On the evolving nature of c/a ratio in a hexagonal close-packed epsilon martensite phase in transformative high entropy alloys (open access)

On the evolving nature of c/a ratio in a hexagonal close-packed epsilon martensite phase in transformative high entropy alloys

Article studying c/a ratio and transformation volume change of h.c.p. (hexagonal close packed) epsilon martensite phase in transformative high entropy alloys (HEAs) quantified as functions of alloy chemistry, friction stir processing and tensile deformation. The study reveals that while intrinsic c/a is dependent on alloying elements, c/a of epsilon in transformative HEAs changes with processing and deformation.
Date: June 18, 2019
Creator: Sinha, Subhasis; Nene, Saurabh S.; Frank, Michael; Liu, Kaimiao; Agrawal, Priyanka & Mishra, Rajiv
Object Type: Article
System: The UNT Digital Library
A novel nano-particle strengthened titanium alloy with exceptional specific strength (open access)

A novel nano-particle strengthened titanium alloy with exceptional specific strength

This article microstructurally tailors an exceptionally high-strength titanium alloy, Ti-6Al-2Sn-4Zr-6Mo (Ti6246) through friction stir processing (FSP) in order to provide enhanced weight savings and improved fuel efficiency. The specific strength attained in one of the conditions is close to 450 MPa m³/mg, which is about 22% to 85% greater than any commercially available metallic material. This novel nano particle strengthened Ti alloy is a potential replacement for many structural alloys, enabling significant weight reduction opportunities.
Date: May 7, 2019
Creator: Dutt, Aniket K.; Gwalani, Bharat; Tungala, Vedavyas; Carl, Matthew; Mishra, Rajiv; Tamirisakandala, Sesh A. et al.
Object Type: Article
System: The UNT Digital Library
High Tensile Ductility and Strength in Dual-phase Bimodal Steel through Stationary Friction Stir Processing (open access)

High Tensile Ductility and Strength in Dual-phase Bimodal Steel through Stationary Friction Stir Processing

This article demonstrates a facile single-step processing route for the development of bimodal grain structure in austenitic stainless steel, SS316L.
Date: September 28, 2018
Creator: Singh Arora, Harpreet; Ayyagari, Aditya; Saini, J.; Selvam, K.; Riyadh, S.; Pole, M. et al.
Object Type: Article
System: The UNT Digital Library
Surface degradation mechanisms in a eutectic high entropy alloy at microstructural length-scales and correlation with phase-specific work function (open access)

Surface degradation mechanisms in a eutectic high entropy alloy at microstructural length-scales and correlation with phase-specific work function

Article evaluating wear and corrosion behavior for the AlCoCrFeNi2.1 eutectic high entropy alloy consisting of BCC (B2), and FCC (L12) lamellae.
Date: January 9, 2019
Creator: Hasannaeimi, Vahid; Ayyagari, Aditya; Muskeri, Saideep; Salloom, Riyadh & Mukherjee, Sundeep
Object Type: Article
System: The UNT Digital Library
Physical and optical properties of the International Simple Glass (open access)

Physical and optical properties of the International Simple Glass

This article presents physical property data (both published and previously unpublished) on a single batch of International Simple Glass (ISG), which was cast into individual ingots that were distributed to the collaborators. Properties from the atomic scale to the macroscale, including composition and elemental impurities, phase purity, density, thermal properties, mechanical properties, optical and vibrational properties, and the results of molecular dynamics simulations are presented, as well as information on the surface composition and morphology after polishing. Although the existing literature on the alteration of ISG is not extensively reviewed here, the results of well-controlled static alteration experiments are presented here as a point of reference for other performance investigations.
Date: May 8, 2018
Creator: Kaspar, Tiffany C.; Ryan, Joseph V.; Pantano, Carlo G.; Rice, Jarrett; Trivelpiece, Cory; Hyatt, Neil C. et al.
Object Type: Article
System: The UNT Digital Library
Fundamentals of three-dimensional Yb-fiber Nd:YAG laser machining of structural bone (open access)

Fundamentals of three-dimensional Yb-fiber Nd:YAG laser machining of structural bone

This article presents a study that aims to understand the fundamental aspects of the laser-bone interaction in three-dimensional laser machining of the bone through an integrated experimental-computational approach.
Date: June 28, 2019
Creator: Dahotre, Narendra B.; Pantawane, Mangesh V.; Robertson, William B.; Khan, Riaz J. K. & Fick, Daniel P.
Object Type: Article
System: The UNT Digital Library
Growth of pulsed laser deposited few-layer WS2 films (open access)

Growth of pulsed laser deposited few-layer WS2 films

This article performs X-ray photoelectron, Raman, and diffraction studies of few-layered pulsed laser deposited WS₂ films as a function of laser fluence and frequency to understand the impact on structure and properties.
Date: August 13, 2019
Creator: Rathod, Urmilaben P.; Cai, Bimin; Iheomamere, Chukwudi; Nyandoto, Gilbert; Voevodin, Andrey A. & Shepherd, Nigel D.
Object Type: Article
System: The UNT Digital Library
Graphene-covered transition metal halide molecules as efficient and durable electrocatalysts for oxygen reduction and evolution reactions (open access)

Graphene-covered transition metal halide molecules as efficient and durable electrocatalysts for oxygen reduction and evolution reactions

Author Manuscript version of an article designing a new type of electrocatalysts consisting of transition metal halide molecules covered by graphene sheets. This work provides a theoretical base for rationally designing durable electrocatalysts with excellent catalytic activities.
Date: September 26, 2019
Creator: Xia, Zhenhai; Zhang, Detao; Zhang, Jing; Gong, Lele; Zhu, Yonghao & Zhang, Lipeng
Object Type: Article
System: The UNT Digital Library
Sc3N@C80 and La@C82 doped graphene for a new class of optoelectronic devices (open access)

Sc3N@C80 and La@C82 doped graphene for a new class of optoelectronic devices

This is the Author Manuscript version of an article presenting high-performance hybrid graphene photodetectors prepared with endohedral fullerenes deposited on graphene using electrophoretic methods for the first time.
Date: December 19, 2019
Creator: Jayanand, Kishan; Min, Misook; Chugh, Srishti; Kaul, Anupama; Adhikari, Nirmal & Echegoyen, Luis
Object Type: Article
System: The UNT Digital Library
Polydimethylsiloxane and polyisoprene-based graphene composites for strain-sensing (open access)

Polydimethylsiloxane and polyisoprene-based graphene composites for strain-sensing

In this article, different composite materials have been developed and characterized for different applications in the health science field and as optoelectromechanical sensors.
Date: March 31, 2017
Creator: Catalan Gonzalez, Jorge Alfredo & Kaul, Anupama
Object Type: Article
System: The UNT Digital Library
Investigation of structural morphology and electrical properties of graphene-C₆₀ hybrids (open access)

Investigation of structural morphology and electrical properties of graphene-C₆₀ hybrids

This article reports on the electrophoretic deposition of C₆₀ on graphene. The results suggest that graphene based C₆₀ structures are attractive as flexible transparent electrodes and are excellent electron accepting/charge transport materials for the construction of efficient photovoltaic devices.
Date: May 2, 2017
Creator: Chugh, Srishti; Biswas, Chandan; Echegoyen, Luis & Kaul, Anupama
Object Type: Article
System: The UNT Digital Library
Inkjet printing of liquid-exfoliated, highly conducting graphene/poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) nanosheets for organic electronics (open access)

Inkjet printing of liquid-exfoliated, highly conducting graphene/poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) nanosheets for organic electronics

In this article, highly dispersive graphene inks are demonstrated by liquid-phase exfoliation of the bulk graphite crystal in the solvent N-methyl-2-pyrrolidone (NMP).
Date: May 4, 2017
Creator: Desai, Jay A.; Biswas, Chandan & Kaul, Anupama
Object Type: Article
System: The UNT Digital Library
Carbon Nanomaterials for Optical Absorber Applications (open access)

Carbon Nanomaterials for Optical Absorber Applications

Article describing optical absorbers based on vertically aligned multi-walled carbon nanotubes (MWCNTs), synthesized using electric-field assisted growth that show an ultra-low reflectance, 100X lower compared to the benchmark, a diffuse metal black - Au-black - from wavelength λ ~ 350 nm – 2500 nm.
Date: December 28, 2011
Creator: Kaul, Anupama; Coles, James; Megerian, Krikor; Eastwood, Michael; Green, Robert; Pagano, Thomas et al.
Object Type: Article
System: The UNT Digital Library
Biocompatible, large-format, inkjet printed heterostructure molybdenum disulfide-graphene photodetectors on conformable substrates (open access)

Biocompatible, large-format, inkjet printed heterostructure molybdenum disulfide-graphene photodetectors on conformable substrates

This article describes an inkjet printed, biocompatible, heterostructure photodetector that was constructed using inks of photo-active molybdenum disulfide (MoS2) and electrically conducting graphene which facilitated charge collection of the photocarriers. The importance of such devices stems from their potential utility in age-related-macular degeneration, which is a condition where the photosensitive retinal tissue degrades with aging, eventually compromising vision. The absence of effective therapeutic remedies for patients with this disorder has motivated the development of such devices to restore some degree of visual function.
Date: September 7, 2017
Creator: Hossain, Ridwan F.; Deaguero, Isaac G.; Boland, Thomas & Kaul, Anupama
Object Type: Article
System: The UNT Digital Library
Corrosion of Al0.1CoCrFeNi High Entropy Alloy in a Molten Eutectic Salt (open access)

Corrosion of Al0.1CoCrFeNi High Entropy Alloy in a Molten Eutectic Salt

Article describes study which investigates the hot corrosion behavior of Al0.1CoCrFeNi high entropy alloy (HEA) and Ni-base Alloy 718.
Date: July 17, 2019
Creator: Jalbuena, A.A.; Ury, Nicholas; Bae, Jaewan; Faraj, Christopher; Hanan, Kailey; Kasnakjian, Shahan et al.
Object Type: Article
System: The UNT Digital Library
Thermo-mechanical response of single-phase face-centered-cubic AlxCoCrFeNi high-entropy alloy microcrystals (open access)

Thermo-mechanical response of single-phase face-centered-cubic AlxCoCrFeNi high-entropy alloy microcrystals

Article describes the response of [100]-oriented single-crystal face-centered-cubic Al0.1CoCrFeNi and Al0.3CoCrFeNi high-entropy alloy (HEA) microcrystals tested from 293 to 573 K by means of in situ micro-compression.
Date: March 13, 2018
Creator: Jiao, Quan; Sim, Gi-Dong; Komarasamy, Mageshwari; Mishra, Rajiv; Liaw, Peter K. & El-Awady, Jaafar A.
Object Type: Article
System: The UNT Digital Library
Crystallographically degenerate B2 precipitation in a plastically deformed fcc-based complex concentrated alloy (open access)

Crystallographically degenerate B2 precipitation in a plastically deformed fcc-based complex concentrated alloy

Article describes the development of bcc-ordered B2 and fcc phases manifested in three different orientation relationships (ORs) in the same microstructure: Kurdjumov–Sachs, Nishiyama–Wasserman and Pitsch.
Date: January 22, 2018
Creator: Choudhuri, Deep; Shukla, Shivakant; Green, Whitley; Gwalani, Bharat; Ageh, Victor; Banerjee, Rajarshi et al.
Object Type: Article
System: The UNT Digital Library
Hierarchical features infused heterogeneous grain structure for extraordinary strength-ductility synergy (open access)

Hierarchical features infused heterogeneous grain structure for extraordinary strength-ductility synergy

Article describes experiment in which a synergistic balance of strength and ductility was achieved in a prototypical fcc-based Al0.3CoCrFeNi complex concentrated alloy by incorporating hierarchical microstructural features into heterogeneous grain structure.
Date: October 27, 2018
Creator: Shukla, Shivakant; Choudhuri, Deep; Wang, Tianhao; Liu, Kaimiao; Robert Wheeler; Williams, Sarah et al.
Object Type: Article
System: The UNT Digital Library
Physical and Mechanical Properties of Polymer Composites with High Content of Wastes Including Boron (open access)

Physical and Mechanical Properties of Polymer Composites with High Content of Wastes Including Boron

Article describes study examining the physical and mechanical properties of polymer composite with wastes that incorporate boron.
Date: December 4, 2015
Creator: Uygunoglua, Tayfun; Gunes, Ibrahim & Brostow, Witold, 1934-
Object Type: Article
System: The UNT Digital Library
Self-Assembly Techniques for Nanofabrication (open access)

Self-Assembly Techniques for Nanofabrication

Article introduces a special issue of the Journal of Nanomaterials that addresses the research studies on fabrication, processing, and applications of self-assembled nanostructures.
Date: December 24, 2013
Creator: Kajbafvala, Amir; Bahmanpour, Hamed; Maneshian, Mohammad H. & Li, Minghang
Object Type: Article
System: The UNT Digital Library
Bulk Nanostructured Metals and Alloys: Processing, Structure, and Thermal Stability (open access)

Bulk Nanostructured Metals and Alloys: Processing, Structure, and Thermal Stability

Introduction to a special issue of the Journal of Nanomaterials focusing on bulk nanostructured alloys and metals.
Date: November 21, 2012
Creator: Bahmanpour, Hamed; Kajbafvala, Amir; Maneshian, Mohammad H.; Zargar, Hamid Reza & Youssef, Khaled
Object Type: Article
System: The UNT Digital Library
Surface Integrity Achieved by Finishing Processes on Sverker 21 and Vanadis 6 Cold Working Tool Steels (open access)

Surface Integrity Achieved by Finishing Processes on Sverker 21 and Vanadis 6 Cold Working Tool Steels

Article discusses the effects of various processes on the surface integrity of Sverker 21 and Vanadis 6 steel surfaces.
Date: November 2015
Creator: Brostow, Witold, 1934-; Czechowski, K.; Kot, M.; Rusek, P. & Toboła, D.
Object Type: Article
System: The UNT Digital Library
A new combinatorial approach to assess the influence of alloy composition on the oxidation behavior and concurrent oxygen-induced phase transformations for binary Ti–xCr alloys at 650 °C (open access)

A new combinatorial approach to assess the influence of alloy composition on the oxidation behavior and concurrent oxygen-induced phase transformations for binary Ti–xCr alloys at 650 °C

Article describes an experiment in which a combinatorial approach was used to investigate systematically the influence of composition and time on the oxidation of Ti–Cr system.
Date: May 11, 2015
Creator: Samimi, Peyman; Liu, Yue; Ghamarian, Iman; Brice, David A. & Collins, Peter
Object Type: Article
System: The UNT Digital Library
Development and application of a novel precession electron diffraction technique to quantify and map deformation structures in highly deformed materials—as applied to ultrafine-grained titanium (open access)

Development and application of a novel precession electron diffraction technique to quantify and map deformation structures in highly deformed materials—as applied to ultrafine-grained titanium

Article describes precession electron diffraction (PED), which makes possible the very accurate and automated quantitative characterization of technically interesting materials that historically have been difficult to analyze due to their dimensions and/or degree of deformation, including specifically ultrafine-grained metallic structures with high dislocation densities.
Date: August 13, 2014
Creator: Ghamarian, Iman; Liu, Yue; Samimi, Peyman & Collins, Peter
Object Type: Article
System: The UNT Digital Library