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Force Structure: Army and Marine Corps Efforts to Review Nonstandard Equipment for Future Usefulness (open access)

Force Structure: Army and Marine Corps Efforts to Review Nonstandard Equipment for Future Usefulness

Correspondence issued by the Government Accountability Office with an abstract that begins "In summary, the Army and the Marine Corps have taken steps to determine the future usefulness of nonstandard equipment but have not finalized all of the decisions on whether to add such equipment to unit authorization documents. As of November 2011, the Army had reviewed 409 equipment systems through its Capabilities Development for Rapid Transition process, determining that about 11 percent of that equipment is useful for the future and about 37 percent is not needed and should be terminated. The Army has not made a final decision on the future need for the remaining 52 percent of the equipment, which it continues to sustain for current operations primarily through the use of overseas contingency operations funds. The Army has also taken some additional actions to review nonstandard equipment through other forums and reviews which have led to recommendations for some items to be retained for the future. Since 2008, the Marine Corps has reviewed 144 different requests for capabilities to fill gaps identified by commanders. Of these, the Marine Corps has determined that about 63 percent will continue to be needed in the future to meet enduring …
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Inspectors General: HUD Office of Inspector General Resources and Results (open access)

Inspectors General: HUD Office of Inspector General Resources and Results

A letter report issued by the Government Accountability Office with an abstract that begins "During the 5-year period from fiscal year 2007 through 2011, the Department of Housing and Urban Development’s (HUD) Office of Inspector General (OIG) had budget and staffing resources that were consistent with other OIGs, and a monetary return for each budget dollar which exceeded the average return for Cabinet-level OIGs. During the 5-year period, the HUD OIG had total budgetary resources ranging from $121 million to $144 million, consistently ranking it fifth among all Cabinet-level OIGs. However, while the total budgetary resources for all Cabinet-level OIGs increased by about 45 percent over the 5-year period, the HUD OIG’s total budgetary resources increased by 19 percent. In terms of staffing, the HUD OIG’s full-time-equivalent staff (FTE) consistently ranked in the top four or five of the Cabinet-level OIGs. Also, the HUD OIG’s FTEs increased by about 13 percent during the 5-year period, as compared to about a 17 percent average increase for all Cabinet-level OIGs. During the same 5-year period, the HUD OIG reported an estimated average dollar return of about $13.62 for each HUD OIG total budgetary dollar received, while the 16 OIGs in the Cabinet-level …
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Terrorist Watchlist: Routinely Assessing Impacts of Agency Actions since the December 25, 2009, Attempted Attack Could Help Inform Future Efforts (open access)

Terrorist Watchlist: Routinely Assessing Impacts of Agency Actions since the December 25, 2009, Attempted Attack Could Help Inform Future Efforts

A letter report issued by the Government Accountability Office with an abstract that begins "In July 2010, the federal government finalized guidance to address weaknesses in the watchlist nominations process that were exposed by the December 2009 attempted attack and to clarify how agencies are to nominate individuals to the watchlist. The nominating agencies GAO contacted expressed concerns about the increasing volumes of information and related challenges in processing this information. Nevertheless, nominating agencies are sending more information for inclusion in the terrorist watchlist after the attempted attack than before the attempted attack. Agencies are also pursuing staffing, technology, and other solutions to address challenges in processing the volumes of information. In 2011, an interagency policy committee began an initiative to assess the initial impacts the guidance has had on nominating agencies, but did not provide details on whether such assessments would be routinely conducted in the future. Routine assessments could help the government determine the extent to which impacts are acceptable and manageable from a policy perspective and inform future efforts to strengthen the nominations process."
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Managing for Results: GAO's Work Related to the Interim Crosscutting Priority Goals under the GPRA Modernization Act (open access)

Managing for Results: GAO's Work Related to the Interim Crosscutting Priority Goals under the GPRA Modernization Act

Correspondence issued by the Government Accountability Office with an abstract that begins "The act requires that OMB develop federal government priority goals (crosscutting goals) and a federal government performance plan, which is to be updated annually and released concurrently with the President’s budget. Specifically, it requires OMB, starting with the 2015 budget and in coordination with agencies and in consultation with the Congress, to develop—every 4 years—long-term, outcome-oriented goals for a limited number of crosscutting policy areas and goals for management improvement areas, including: financial management; human capital management; information technology management; procurement and acquisition management; and real property management. The goals are to be updated or revised every 4 years. In addition, OMB is required to develop interim priority goals, starting with the 2013 budget. OMB is also required to provide information on how these federal government priority goals will be achieved in a federal government performance plan."
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Nonpoint Source Water Pollution: Greater Oversight and Additional Data Needed for Key EPA Water Program (open access)

Nonpoint Source Water Pollution: Greater Oversight and Additional Data Needed for Key EPA Water Program

A letter report issued by the Government Accountability Office with an abstract that begins "Under section 319 of the Clean Water Act, state-selected projects to reduce nonpoint source pollution have helped restore more than 350 impaired water bodies since 2000, but other projects have encountered significant challenges. According to GAO survey results, 28 percent of projects did not achieve all objectives originally identified in the project proposal (e.g., implementing the desired number of pollution reduction practices), while many that did so still faced considerable challenges. About half such challenges were beyond staff control (e.g., bad weather or staff turnover), but the other half were challenges that generally could have been identified and mitigated before projects were proposed and selected for funding, such as gaining access to desired properties. In one state, for example, $285,000 in section 319 funds was to subsidize the cost to homeowners of repairing damaged septic systems. Once the grant was awarded, however, one homeowner signed up to participate."
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Human Rights: State Department Followed an Extensive Process to Prepare Annual Country Reports (open access)

Human Rights: State Department Followed an Extensive Process to Prepare Annual Country Reports

Correspondence issued by the Government Accountability Office with an abstract that begins "State has an extensive process designed to make the country reports on human rights as comprehensive, objective, and uniform as possible. This process includes annually issuing detailed instructions, consulting and assessing information from multiple sources, and collaboratively and iteratively drafting and reviewing the reports. State issues instructions for preparing the country reports each year, outlining a consistent structure and describing, for example, the topics that should be included in each subsection. The instructions also, among other things, indicate that the country reports should build on the previous year’s reports and specify guidelines for new and updated content. In addition, the instructions state that staff preparing the country reports are to use and assess multiple sources, including host governments, local and international human NGOs, labor unions, and host country media as well as classified information. State officials told us that they also obtain information from business leaders and industry groups, although there is no legal requirement to do so. In general, according to State officials, Foreign Service officers—often on their first or second tour of duty—prepare first drafts of the country reports with the assistance of other embassy personnel, …
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Observations on the Coast Guard's and the Department of Homeland Security's Fleet Studies (open access)

Observations on the Coast Guard's and the Department of Homeland Security's Fleet Studies

Correspondence issued by the Government Accountability Office with an abstract that begins "Fleet Mix Phase One, which was not cost constrained, indicated that the planned program of record does not fully meet long-term strategic goals and found that, to meet these goals, the Coast Guard requires a fleet that could cost as much as $65 billion to acquire, which is about $40 billion more than the $24.2 billion program of record. Coast Guard officials stated that the analysis supports the continued pursuit of the program of record. However, DHS Program Analysis & Evaluation (PA&E) and OMB officials told us that the analysis has limited utility without cost constraints and trade-offs."
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Defense Acquisitions: Further Action Needed to Improve DOD's Insight and Management of Long-term Maintenance Contracts (open access)

Defense Acquisitions: Further Action Needed to Improve DOD's Insight and Management of Long-term Maintenance Contracts

A letter report issued by the Government Accountability Office with an abstract that begins "At the departmental level, neither the Department of Defense (DOD) nor the individual military departments know the extent to which weapon system programs rely on long-term maintenance contracts. DOD policy requires DOD and the military departments to approve acquisition strategies and lifecycle sustainment plans, which include information on contractor support, but DOD officials reported that they do not collect information on the use of long-term contracts. DOD’s limited visibility over long-term maintenance contracts reflects broader DOD challenges with managing services acquisition. GAO’s past work has identified the need for DOD to obtain better data on its contracted services to enable it to make more strategic decisions. DOD is considering a number of policy- and data-related initiatives that could improve its knowledge of these contracts, but these efforts are in the early stages of development."
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Rural Housing Service: Efforts to Identify and Reduce Improper Rental Assistance Payments Could Be Enhanced (open access)

Rural Housing Service: Efforts to Identify and Reduce Improper Rental Assistance Payments Could Be Enhanced

A letter report issued by the Government Accountability Office with an abstract that begins "The Rural Housing Service (RHS) has identified improper rental assistance payments caused by certain sources of errors, but its reported error rate (total amount improperly paid divided by program outlays) may understate the magnitude of the problem. RHS has identified improper payments resulting from inaccurate calculations of tenant subsidies and incomplete supporting documents. From fiscal years 2007 through 2010, RHS reduced its reported error rate from 3.95 percent (representing $35 million in errors) to 1.48 percent (representing $15 million in errors). However, these figures may be understated because RHS has not estimated improper payments due to unreported tenant income, and it lacks the authority to match tenant data to federal income data for this purpose. These data include the Department of Health and Human Services’ (HHS) New Hires database and the Social Security Administration’s (SSA) data on benefits payments. RHS has proposed legislation to gain access to the HHS data but not the SSA data. Additionally, RHS has not recently estimated payment processing errors and has not strictly adhered to procedures for classifying payments as improper. Further, in 2008, RHS began excluding improper payments of less …
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
President's Emergency Plan for AIDS Relief: Agencies Can Enhance Evaluation Quality, Planning, and Dissemination (open access)

President's Emergency Plan for AIDS Relief: Agencies Can Enhance Evaluation Quality, Planning, and Dissemination

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of State’s (State) Office of the U.S. Global AIDS Coordinator (OGAC), the Department of Health and Human Services’ (HHS) Centers for Disease Control and Prevention (CDC), and the U.S. Agency for International Development (USAID) have evaluated a wide variety of President’s Emergency Plan for AIDS Relief (PEPFAR) program activities, demonstrating a clear commitment to evaluation. However, GAO found that the findings, conclusions, and recommendations were not fully supported in many PEPFAR evaluations. Agency officials provided nearly 500 evaluations addressing activities ongoing in fiscal years 2008 through 2010 in all program areas relating to HIV/AIDS treatment, prevention, and care. GAO’s assessment of a selected sample of seven OGAC-managed evaluations found that they generally adhered to common evaluation standards, as did most of a selected sample of 15 evaluations managed by CDC and USAID headquarters. Based on this assessment, GAO determined that these evaluations generally contained fully supported findings, conclusions, and recommendations. However, based on a similar assessment of a randomly selected sample taken from 436 evaluations provided by PEPFAR country and regional teams, GAO estimated that 41 percent contained fully supported findings, conclusions, and recommendations, …
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
Mental Health and Substance Use: Treatment Exclusions in Employers' Health Insurance Coverage (open access)

Mental Health and Substance Use: Treatment Exclusions in Employers' Health Insurance Coverage

Correspondence issued by the Government Accountability Office with an abstract that begins "In summary, this report provides information on the incidence of treatment exclusions for MH/SU for the 2011 or 2010 plan year and the 2008 plan year for employers that responded to our survey. In total, for the 2011 or 2010 plan year, of the 96 employers that responded to our question about whether their most popular plan excluded coverage for any specific treatments related to MH/SU, 39 employers reported excluding a treatment. In comparison, for the 2008 plan year, of the 81 employers that responded to our question about whether their most popular excluded coverage for any specific treatments related to MH/SU, 27 employers reported excluding a treatment."
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Text
System: The UNT Digital Library
Critical Infrastructure Protection: DHS Could Better Manage Security Surveys and Vulnerability Assessments (open access)

Critical Infrastructure Protection: DHS Could Better Manage Security Surveys and Vulnerability Assessments

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Homeland Security (DHS) has conducted about 2,800 security surveys and vulnerability assessments on critical infrastructure and key resources (CIKR). DHS directs its protective security advisors to contact owners and operators of high-priority CIKR to offer to conduct surveys and assessments. However, DHS is not positioned to track the extent to which these are performed at high-priority CIKR because of inconsistencies between the databases used to identify these assets and those used to identify surveys and assessments conducted. GAO compared the two databases and found that of the 2,195 security surveys and 655 vulnerability assessments conducted for fiscal years 2009 through 2011, 135 surveys and 44 assessments matched and another 106 surveys and 23 assessments were potential matches for high-priority facilities. GAO could not match additional high-priority facilities because of inconsistencies in the way data were recorded in the two databases, for example, assets with the same company name had different addresses or an asset at one address had different names. DHS officials acknowledged that the data did not match and have begun to take actions to improve the collection and organization of the …
Date: May 31, 2012
Creator: United States. Government Accountability Office.
Object Type: Report
System: The UNT Digital Library
The Greensheet (Houston, Tex.), Vol. 43, No. 212, Ed. 1 Thursday, May 31, 2012 (open access)

The Greensheet (Houston, Tex.), Vol. 43, No. 212, Ed. 1 Thursday, May 31, 2012

Free weekly newspaper that includes business and classified advertising.
Date: May 31, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
Port Aransas South Jetty (Port Aransas, Tex.), Vol. 41, No. 22, Ed. 1 Thursday, May 31, 2012 (open access)

Port Aransas South Jetty (Port Aransas, Tex.), Vol. 41, No. 22, Ed. 1 Thursday, May 31, 2012

Weekly newspaper from Port Aransas, Texas on Mustang Island that includes local, state and national news along with extensive advertising.
Date: May 31, 2012
Creator: Judson, Mary Henkel
Object Type: Newspaper
System: The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 43, No. 213, Ed. 1 Thursday, May 31, 2012 (open access)

The Greensheet (Houston, Tex.), Vol. 43, No. 213, Ed. 1 Thursday, May 31, 2012

Free weekly newspaper that includes business and classified advertising.
Date: May 31, 2012
Creator: unknown
Object Type: Newspaper
System: The Portal to Texas History
The Naples Monitor (Naples, Tex.), Vol. 126, No. 16, Ed. 1 Thursday, May 31, 2012 (open access)

The Naples Monitor (Naples, Tex.), Vol. 126, No. 16, Ed. 1 Thursday, May 31, 2012

Weekly newspaper from Naples, Texas that includes local, state and national news along with advertising.
Date: May 31, 2012
Creator: Craig, Morris
Object Type: Newspaper
System: The Portal to Texas History
TANK 21 AND TANK 24 BLEND AND FEED STUDY: BLENDING TIMES, SETTLING TIMES, AND TRANSFERS (open access)

TANK 21 AND TANK 24 BLEND AND FEED STUDY: BLENDING TIMES, SETTLING TIMES, AND TRANSFERS

The Salt Disposition Integration (SDI) portfolio of projects provides the infrastructure within existing Liquid Waste facilities to support the startup and long term operation of the Salt Waste Processing Facility (SWPF). Within SDI, the Blend and Feed Project will equip existing waste tanks in the Tank Farms to serve as Blend Tanks where salt solutions of up to 1.2 million gallons will be blended in 1.3 million gallon tanks and qualified for use as feedstock for SWPF. In particular, Tanks 21 and 24 are planned to be used for blending and transferring to the SDI feed tank. These tanks were evaluated here to determine blending times, to determine a range of settling times for disturbed sludge, and to determine that the SWPF Waste Acceptance Criteria that less than 1200 mg/liter of solids will be entrained in salt solutions during transfers from the Tank 21 and Tank 24 will be met. Overall conclusions for Tank 21 and Tank 24 operations include: (1) Experimental correction factors were applied to CFD (computational fluid dynamics) models to establish blending times between approximately two and five hours. As shown in Phase 2 research, blending times may be as much as ten times greater, or more, …
Date: May 31, 2012
Creator: Lee, S.; Leishear, R. & Poirier, M.
Object Type: Report
System: The UNT Digital Library
Multi-Scale Action Effectiveness Research in the Lower Columbia River and Estuary, 2011 - FINAL ANNUAL REPORT (open access)

Multi-Scale Action Effectiveness Research in the Lower Columbia River and Estuary, 2011 - FINAL ANNUAL REPORT

The study reported here was conducted by researchers at Pacific Northwest National Laboratory (PNNL), the Oregon Department of Fish and Wildlife (ODFW), the University of Washington (UW), and the National Marine Fisheries Service (NMFS) for the U.S. Army Corps of Engineers, Portland District (USACE). This research project was initiated in 2007 by the Bonneville Power Administration to investigate critical uncertainties regarding juvenile salmon ecology in shallow tidal freshwater habitats of the lower Columbia River. However, as part of the Washington Memorandum of Agreement, the project was transferred to the USACE in 2010. In transferring from BPA to the USACE, the focus of the tidal freshwater research project shifted from fundamental ecology toward the effectiveness of restoration in the Lower Columbia River and estuary (LCRE). The research is conducted within the Action Agencies Columbia Estuary Ecosystem Restoration Program (CEERP). Data reported herein spans the time period May 2010 to September 2011.
Date: May 31, 2012
Creator: Sather, Nichole K.; Storch, Adam; Johnson, Gary E.; Teel, D. J.; Skalski, J. R.; Bryson, Amanda J. et al.
Object Type: Report
System: The UNT Digital Library
Next Generation Surfactants for Improved Chemical Flooding Technology (open access)

Next Generation Surfactants for Improved Chemical Flooding Technology

The principle objective of this project was to characterize and test current and next generation high performance surfactants for improved chemical flooding technology, focused on reservoirs in the Pennsylvanian-aged (Penn) sands. In order to meet this objective the characteristic curvatures (Cc) of twenty-eight anionic surfactants selected for evaluation for use in chemical flooding formulations were determined. The Cc values ranged from -6.90 to 2.55 with the majority having negative values. Crude oil samples from nine Penn sand reservoirs were analyzed for several properties pertinent to surfactant formulation for EOR application. These properties included equivalent alkane carbon numbers, total acid numbers, and viscosity. The brine samples from these same reservoirs were analyzed for several cations and for total dissolved solids. Surfactant formulations were successfully developed for eight reservoirs by the end of the project period. These formulations were comprised of a tertiary mixture of anionic surfactants. The identities of these surfactants are considered proprietary, but suffice to say the surfactants in each mixture were comprised of varying chemical structures. In addition to the successful development of surfactant formulations for EOR, there were also two successful single-well field tests conducted. There are many aspects that must be considered in the development and …
Date: May 31, 2012
Creator: Wesson, Laura; Lohateeraparp, Prapas; Harwell, Jeffrey & Shiau, Bor-Jier
Object Type: Report
System: The UNT Digital Library
Mid-Atlantic Wind - Overcoming the Challenges (open access)

Mid-Atlantic Wind - Overcoming the Challenges

This study, supported by the US Department of Energy, Wind Powering America Program, Maryland Department of Natural Resources and Chesapeake Bay Foundation, analyzed barriers to wind energy development in the Mid-Atlantic region along with options for overcoming or mitigating them. The Mid-Atlantic States including Delaware, Maryland, North Carolina and Virginia, have excellent wind energy potential and growing demand for electricity, but only two utility-scale projects have been installed to date. Reasons for this apathetic development of wind resources were analyzed and quantified for four markets. Specific applications are: 1) Appalachian mountain ridgeline sites, 2) on coastal plains and peninsulas, 3) at shallow water sites in Delaware and Chesapeake Bays, Albemarle and Pamlico Sounds, and 4) at deeper water sites off the Atlantic coast. Each market has distinctly different opportunities and barriers. The primary barriers to wind development described in this report can be grouped into four categories; state policy and regulatory issues, wind resource technical uncertainty, economic viability, and public interest in environmental issues. The properties of these typologies are not mutually independent and do interact. The report concluded that there are no insurmountable barriers to land-based wind energy projects and they could be economically viable today. Likewise potential sites …
Date: May 31, 2012
Creator: Ancona, Daniel F., III; George, Kathryn E.; Bowers, Richard P.; Sparling, Dr. Lynn; Buckheit, Bruce & LoBue, Daniel
Object Type: Report
System: The UNT Digital Library
Probing Novel Properties of Nucleons and Nuclei via Parity Violating Electron Scattering (open access)

Probing Novel Properties of Nucleons and Nuclei via Parity Violating Electron Scattering

This thesis reports on two experiments conducted by the HAPPEx (Hall A Proton Parity Experiment) collaboration at the Thomas Je#11;erson National Accelerator Facil- ity. For both, the weak neutral current interaction (WNC, mediated by the Z{sup 0} boson) is used to probe novel properties of hadronic targets. The WNC interaction amplitude is extracted by measuring the parity-violating asymmetry in the elastic scattering of longitudinally polarized electrons o#11; unpolarized target hadrons. HAPPEx-III, con- ducted in the Fall of 2009, used a liquid hydrogen target at a momentum transfer of Q{sup 2} = 0.62 GeV{sup 2}. The measured asymmetry was used to set new constraints on the contribution of strange quark form factors (G{sup s}{sub E,M} ) to the nucleon electromagnetic form factors. A value of A{sub PV} = -23.803{+-}#6; 0.778 (stat){+-}#6; 0.359 (syst) ppm resulted in G{sup s}{sub E} + 0:517G{sup s}{sub M} = 0.003{+-} 0.010 (stat){+-} #6;0.004 (syst){+-}#6; #6;0.009 (FF). PREx, conducted in the Spring of 2010, used a polarized electron beam on a 208Pb target at a momentum transfer of Q{sup 2} = 0.009 GeV{sup 2}. This parity-violating asymmetry can be used to obtain a clean measurement of the root-mean-square radius of the neutrons in the {sup 208}Pb nucleus. …
Date: May 31, 2012
Creator: Mercado, Luis
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Exploratory Use of Microaerosol Decontamination Technology (PAEROSOL) in Enclosed, Unoccupied Hospital Setting (open access)

Exploratory Use of Microaerosol Decontamination Technology (PAEROSOL) in Enclosed, Unoccupied Hospital Setting

The goal of this study was to validate the previously observed high biological kill performance of PAEROSOL, a semi-dry, micro-aerosol decontamination technology, against common HAI in a non-human subject trial within a hospital setting of Madigan Army Medical Center (MAMC) on Joint Base Lewis-McChord in Tacoma, Washington. In addition to validating the disinfecting efficacy of PAEROSOL, the objectives of the trial included a demonstration of PAEROSOL environmental safety, (i.e., impact to hospital interior materials and electronic equipment exposed during testing) and PAEROSOL parameters optimization for future deployment.
Date: May 31, 2012
Creator: Rainina, Evguenia I.; McCune, D. E.; Luna, Maria L.; Cook, J. E.; Soltis, Michele A.; Demons, Samandra T. et al.
Object Type: Report
System: The UNT Digital Library
Advanced Electric Submersible Pump Design Tool for Geothermal Applications (open access)

Advanced Electric Submersible Pump Design Tool for Geothermal Applications

Electrical Submersible Pumps (ESPs) present higher efficiency, larger production rate, and can be operated in deeper wells than the other geothermal artificial lifting systems. Enhanced Geothermal Systems (EGS) applications recommend lifting 300 C geothermal water at 80kg/s flow rate in a maximum 10-5/8-inch diameter wellbore to improve the cost-effectiveness. In this paper, an advanced ESP design tool comprising a 1D theoretical model and a 3D CFD analysis has been developed to design ESPs for geothermal applications. Design of Experiments was also performed to optimize the geometry and performance. The designed mixed-flow type centrifugal impeller and diffuser exhibit high efficiency and head rise under simulated EGS conditions. The design tool has been validated by comparing the prediction to experimental data of an existing ESP product.
Date: May 31, 2012
Creator: Qi, Xuele; Turnquist, Norman & Ghasripoor, Farshad
Object Type: Article
System: The UNT Digital Library
Alumina-Forming Austenitics: A New Approach to Thermal and Degradation Resistant Stainless Steels for Industrial Use (open access)

Alumina-Forming Austenitics: A New Approach to Thermal and Degradation Resistant Stainless Steels for Industrial Use

A series of developmental AFA alloys was selected for study based on: 25 Ni wt.% (alloys A-F), 20 wt% Ni (alloys G-H), and 12 Ni wt.% (alloys I-L). An emphasis in this work was placed on the lower alloy content direction for AFA alloys to reduce alloy raw material cost, rather than more highly alloyed and costly AFA alloys for higher temperature performance. Alloys A-D explored the effects of Al (3-4 wt.%) and C (0.05-0.2 wt.%) in the Fe-25Ni-14Cr-2Mn-2Mo-1W-1Nb wt.% base range; alloys E and F explored the effects of removing costly Mo and W additions in a Fe-25Ni-14Cr-4Al-2.5Nb-2Mn-0.2C base, alloys G and H examined Nb (1-2.5wt.%) and removal of Mo, W in a Fe-20Ni-14Cr-3Al-2Mn-0.2 C wt.% base; and alloys I-L examined effects of C (0.1-0.2 wt.%) and Mn (5-10 wt.%) on a low cost Fe-14Cr-12Ni-3Cu-2.5Al wt.% base (no Mo, W additions). Creep testing resulted in elemental trends that included the beneficial effect of higher carbon and lower niobium in 20-25%Ni AFA alloys and, the beneficial of lower Mn in 12%Ni AFA alloys. Corrosion tests in steam and sulfidation-oxidation environments showed, in general, these alloys were capable of a ten-fold improvement in performance when compared to conventional austenitic stainless steels. …
Date: May 31, 2012
Creator: Helmick, David A; Magee, John H & Brady, Michael P
Object Type: Report
System: The UNT Digital Library