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Extended CT Void Analysis in FDM Additive Manufacturing Components (open access)

Extended CT Void Analysis in FDM Additive Manufacturing Components

This article provides an extended analysis of void shape by means of X-ray computed tomography (CT) applied to fused deposition modeling (FDM) samples. Furthermore, a relation between the tensile mechanical properties and digital void measurements is established. The results lead to the formulation of a novel criterion that predicts the mechanical behavior of AM components.
Date: July 26, 2020
Creator: Hernandez-Contreras, Adriana; Ruiz-Huerta, Leopoldo; Caballero-Ruiz, Alberto; Moock, Verena & Siller Carrillo, Héctor Rafael
System: The UNT Digital Library
Spatial Decomposition of a Broadband Pulse Caused by Strong Frequency Dispersion of Sound in Acoustic Metamaterial Superlattice (open access)

Spatial Decomposition of a Broadband Pulse Caused by Strong Frequency Dispersion of Sound in Acoustic Metamaterial Superlattice

This article uses an acoustic metamaterial superlattice for the spatial and spectral deconvolution of a broadband acoustic pulse into narrowband signals with different central frequencies.
Date: December 30, 2020
Creator: Jin, Yuqi; Zubov, Yurii; Yang, Teng; Choi, Tae-Youl; Krokhin, Arkadii A. & Neogi, Arup
System: The UNT Digital Library
Acoustic Metasurface-Aided Broadband Noise Reduction in Automobile Induced by Tire-Pavement Interaction (open access)

Acoustic Metasurface-Aided Broadband Noise Reduction in Automobile Induced by Tire-Pavement Interaction

Article demonstrating a technique utilizing acoustic metasurfaces (AMSes) with high reflective characteristics using relatively lightweight materials for noise reduction without any change in mechanical strength or weight of the tire. The proposed design can significantly reduce the noise arising from tire–pavement interaction over a broadband of acoustic frequencies under 1000 Hz and over a wide range of vehicle speeds using a negative effective dynamic mass density approach.
Date: July 30, 2021
Creator: Heo, Hyeonu; Sofield, Matthew; Ju, Jaehyung & Neogi, Arup
System: The UNT Digital Library
Effects of UV Stabilizers on Polypropylene Outdoors (open access)

Effects of UV Stabilizers on Polypropylene Outdoors

This article looks at hindered amine light stabilizers (HALSs) and nano ZnO were used to stabilize polypropylene (PP) film-based formulations that were exposed to ultraviolet (UV) light for different lengths of time, simulating the harsh outdoor weather of Dallas, Texas, USA. UV doses applied in our laboratory are 121 times larger than the UV dose provided by the sunlight in Texas. 15 different compositions were studied. The combination of HALSs and nano-ZnO stabilizers makes the PP films harder—which is important for some PP applications, such as toy manufacturing.
Date: April 1, 2020
Creator: Brostow, Witold, 1934-; Lu, Xinyao; Gencel, Osman & Osmanson, Allison T.
System: The UNT Digital Library
Unveiling the interplay of deformation mechanisms in a metastable high entropy alloy with tuned composition using synchrotron X-ray diffraction (open access)

Unveiling the interplay of deformation mechanisms in a metastable high entropy alloy with tuned composition using synchrotron X-ray diffraction

Article investigating the mechanical behavior of a metastable high entropy alloy (HEA) with composition Fe39-Mn20-Co20-Cr15-Si5-1Al (at%).
Date: January 15, 2022
Creator: Polatidis, E.; Shukla, S.; Čapek, J.; Van Petegem, S.; Casati, N. & Mishra, R. S.
System: The UNT Digital Library
High-Temperature Nano-Indentation Creep Behavior of Multi-Principal Element Alloys under Static and Dynamic Loads (open access)

High-Temperature Nano-Indentation Creep Behavior of Multi-Principal Element Alloys under Static and Dynamic Loads

Paper describes the results of studies testing the creep resistance of two multi-principal element alloys, CoCrNi and CoCrFeMnNi.
Date: February 13, 2020
Creator: Sadeghilaridjani, Maryam & Mukherjee, Sundeep
System: The UNT Digital Library
Opportunities and Issues in the Application of Titanium Alloys for Aerospace Components (open access)

Opportunities and Issues in the Application of Titanium Alloys for Aerospace Components

This article describes recent developments, issues, and opportunities associated with the production and use of Ti and its alloys in aerospace components. Included are new Ti alloys, new applications of Ti alloys, and the current status of several manufacturing processes including a discussion of the promise and current reality of additive manufacturing as a potentially revolutionary method of producing Ti alloy components.
Date: May 7, 2020
Creator: Williams, James C. & Boyer, Rodney R.
System: The UNT Digital Library
Corrosion Fatigue Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusion (open access)

Corrosion Fatigue Characteristics of 316L Stainless Steel Fabricated by Laser Powder Bed Fusion

This article studies the corrosion and corrosion fatigue characteristics of LPBF 316L stainless steels (SS) in 3.5 wt.% NaCl solution using an electrochemical method, high cycle fatigue, and fatigue crack propagation testing.
Date: June 29, 2021
Creator: Gnanasekaran, Balachander; Song, Jie; Vasudevan, Vijay K. & Fu, Yao
System: The UNT Digital Library
Probabilistic Seismic Assessment of CoSPSW Structures Using Fragility Functions (open access)

Probabilistic Seismic Assessment of CoSPSW Structures Using Fragility Functions

This article presents a study on the probabilistic assessment of the seismic performance and vulnerability of corrugated steel plate shear walls (CoSPSWs) using fragility functions.
Date: June 18, 2022
Creator: Tan, Zhilun; Zhao, Quihong; Zhao, Yu & Yu, Cheng
System: The UNT Digital Library
Complex Concentrated Alloys (CCAs)—Current Understanding and Future Opportunities (open access)

Complex Concentrated Alloys (CCAs)—Current Understanding and Future Opportunities

Article providing an overview of the special issue titled Complex Concentrated Alloys (CCAs) - Current Understanding and Future Opportunities. The published papers in this special issue aim to report on the current state of research in complex concentrated alloys (CCAs) as well as compelling future opportunities in wide ranging applications.
Date: September 11, 2020
Creator: Mukherjee, Sundeep
System: The UNT Digital Library
Effect of Laser Shock Peening Parameters on Residual Stresses and Corrosion Fatigue of AA5083 (open access)

Effect of Laser Shock Peening Parameters on Residual Stresses and Corrosion Fatigue of AA5083

Article examining Aluminium alloy 5083 subjected to Laser Shock Peening both with (LSP) and without protective coating (LPwC) at multiple pulse densities. A second LPwC treatment was conducted fully submersed under water, in addition to the standard laminar water flow condition. Results show that compressive residual stresses were generated in all cases, although their character varied depending on the peening strategy and method of confinement.
Date: October 14, 2021
Creator: Kaufman, Jan; Špirit, Zbyněk; Vasudevan, Vijay K.; Steiner, Matthew Alan; Mannava, Seetha Ramaiah; Brajer, Jan et al.
System: The UNT Digital Library
Polymorphic nature of {332} 〈 113 〉 twinning mode in BCC alloys (open access)

Polymorphic nature of {332} 〈 113 〉 twinning mode in BCC alloys

Article using ab initio calculations and experimental observations to show that {332}<113> twinning can be described as a polymorphic solid-state transformation able to produce either twinned or martensitic structures with a unified transformation path.
Date: March 17, 2022
Creator: Kwasniak, P.; Sun, F.; Mantri, Srinivas Aditya; Banerjee, Rajarshi & Prima, Frederic
System: The UNT Digital Library
Detection of Pancreatic Cancer miRNA with Biocompatible Nitrogen-Doped Graphene Quantum Dots (open access)

Detection of Pancreatic Cancer miRNA with Biocompatible Nitrogen-Doped Graphene Quantum Dots

Article detects the presence of a specific pancreatic cancer-derived miRNA (pre-miR-132) using the fluorescence properties of biocompatible nitrogen-doped graphene quantum dots (NGQDs) synthesized using a bottom-up approach from a single glucosamine precursor. This non-invasive approach allows cancer-specific miRNA detection to facilitate early diagnosis of various forms of cancer.
Date: August 20, 2022
Creator: Ajgaonkar, Ryan; Lee, Bong; Valimukhametova, Alina; Nguyen, Steven; Gonzalez-Rodriguez, Roberto; Coffer, Jeffery et al.
System: The UNT Digital Library
Flexible and Stretchable Bioelectronics (open access)

Flexible and Stretchable Bioelectronics

Article reviewing several several flexible and stretchable materials used as substrate, stretchable electrical conduits and encapsulation, design modifications for stretchability, fabrication techniques, methods of signal transmission and monitoring, and the power sources for these stretchable bioelectronics. Ultimately, these bioelectronic devices can be used for wide range of applications from skin bioelectronics and biosensing devices, to neural implants for diagnostic or therapeutic purposes.
Date: December 20, 2021
Creator: Chitrakar, Chandani; Hedrick, Eric; Adegoke, Lauren & Ecker, Melanie
System: The UNT Digital Library
A Review of Diagnostics Methodologies for Metal Additive Manufacturing Processes and Products (open access)

A Review of Diagnostics Methodologies for Metal Additive Manufacturing Processes and Products

This article is a review summarizing and discussing various ex-situ inspections and in-situ monitoring methods, including electron-based methods, thermal methods, acoustic methods, laser breakdown, and mechanical methods, for metal additive manufacturing.
Date: August 30, 2021
Creator: Yang, Teng; Mazumder, Sangram; Jin, Yuqi; Squires, Brian; Sofield, Matthew; Pantawane, Mangesh V. et al.
System: The UNT Digital Library
On-chip multiplexed single-cell patterning and controllable intracellular delivery (open access)

On-chip multiplexed single-cell patterning and controllable intracellular delivery

Article presents a simple 3D electroporation platform that enables massively parallel single-cell manipulation and the intracellular delivery of macromolecules and small molecules.
Date: February 24, 2020
Creator: Dong, Zaizai; Jiao, Yanli; Xie, Bingteng; Hao, Yongcun; Wang, Pan; Liu, Yuanyuan et al.
System: The UNT Digital Library
Review of Gamification mindset (open access)

Review of Gamification mindset

This article is a review of the book "Gamification Mindset" by Ole Goethe.
Date: October 15, 2020
Creator: Ham, Chris D.
System: The UNT Digital Library
Structure and inference in Japanese right dislocation (open access)

Structure and inference in Japanese right dislocation

Article exploring the syntactic nature of Japanese Right Dislocation Constructions (RDCs) by illuminating the ellipsis sites in the postverbal domains of the constructions via pragmatic inference. Although the most prevailing bi-clausal analysis of RDCs adopts the perspective that the repetition of the antecedent clause occurs in collocation, this paper shows that the same surface strings are potentially ambiguous since right dislocation is a heterogeneous phenomenon. It proposes additional types of a bi-clausal structure and discusses evidence that suggests that even when the surface strings are the same the recovery of the ellipsis site is possibly derived in multiple ways through the use of distinct linguistic strategies.
Date: May 17, 2018
Creator: Furuya, Kaori
System: The UNT Digital Library
Educación, Ecoturismo y Conservación Biocultural en los Bosques en Miniatura Del Cabo de Hornos (open access)

Educación, Ecoturismo y Conservación Biocultural en los Bosques en Miniatura Del Cabo de Hornos

Article demonstrates that using Field Environmental Philosophy (FEP) methodology, inconspicuous species can be made visible and their ecological, ethical, aesthetic, and economic values can be recognized by citizens.
Date: September 12, 2020
Creator: Rozzi, Ricardo, 1960-; Medina, Yanet & Massardo, Francisca
System: The UNT Digital Library
Pb(ii) adsorption from aqueous solution by an aluminum-based metal organic framework–graphene oxide nanocomposite (open access)

Pb(ii) adsorption from aqueous solution by an aluminum-based metal organic framework–graphene oxide nanocomposite

This article is motivated by the promise of emerging nanocomposites and reports for the first time the adsorption performance of an aluminum-based MOF (MIL-53(Al)) and GO nanocomposite for Pb(II) removal from aqueous solutions.
Date: March 22, 2021
Creator: Chowdhury, Tonoy; Zhang, Lei; Zhang, Junqing & Aggarwal, Srijan
System: The UNT Digital Library
Durability of Portland Concrete Containing Polymeric Fillers and Fly Ash (open access)

Durability of Portland Concrete Containing Polymeric Fillers and Fly Ash

Article explores degradation of Portland concrete and finds that the combination of fly ash with polymers provides significantly improved properties.
Date: January 2, 2020
Creator: Brostow, Witold, 1934-; Chetuya, Nonso; Hong, Hee Jae; Gencel, Osman; Menard, Noah & Sayana, Susmitha
System: The UNT Digital Library
Additive friction stir deposition: a deformation processing route to metal additive manufacturing (open access)

Additive friction stir deposition: a deformation processing route to metal additive manufacturing

This article outlines key advantages of additive friction stir deposition, e.g. rendering fully-dense material in the as-printed state with fine, equiaxed microstructures, identifies its niche engineering uses, and points out future research needs in process physics and materials innovation.
Date: November 24, 2020
Creator: Yu, Hang Z. & Mishra, Rajiv
System: The UNT Digital Library
Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys (open access)

Ordering-mediated local nano-clustering results in unusually large Hall-Petch strengthening coefficients in high entropy alloys

This article reports a dramatic increase in the grain boundary strengthening or Hall-Petch coefficient, K, by systematically investigating the effect of Al addition on tensile yield strength in CoFeNi and CoCrFeNi high entropy alloys (HEAs) or complex concentrated alloys (CCAs). Such a trend is attributed to the ordering mediated nano-clustering in Al containing HEA/CCAs.
Date: January 23, 2021
Creator: Jagetia, Abhinav; Nartu, M. S. K. K. Y.; Dasari, S.; Sharma, A.; Gwalani, Bharat & Banerjee, Rajarshi
System: The UNT Digital Library
Properties of lightweight concrete blocks with waste zeolitic tuff (open access)

Properties of lightweight concrete blocks with waste zeolitic tuff

Article presents an alternative block wall with Bayburt stone (BS) containing zeolite, namely lightweight concrete masonry blocks (LCMBs).
Date: August 17, 2020
Creator: Osmanson, Allison T.; Brostow, Witold, 1934-; Tekin, Ilker; Kotan, Turkay; Gencel, Osman & Martínez-Barrera, Gonzalo
System: The UNT Digital Library