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3D-printed and injection molded polymer matrix composites with 2D layered materials (open access)

3D-printed and injection molded polymer matrix composites with 2D layered materials

This article reports on a study where 2D TMDs (MoS₂ and WS₂) and the 3D allotrope of carbon and graphite were incorporated into acrylonitrile butadiene styrene (ABS) and polyethylene terephthalate glycol (PETG) matrices in order to form polymer matrix composites (PMCs). The multipronged analysis described in this study was motivated by the purpose to fuse together topics of low-cost, additive manufacturing with 2D layered materials, and studying their ensuing mechanical and tribological properties.
Date: June 26, 2020
Creator: Gamboa, Gerardo; Mazumder, Sangram; Hnatchuk, Nathalie; Catalan Gonzalez, Jorge Alfredo; Cortes, Damaris; Chen, Ikang et al.
System: The UNT Digital Library
Achieving extraordinary structural efficiency in a wrought magnesium rare earth alloy (open access)

Achieving extraordinary structural efficiency in a wrought magnesium rare earth alloy

Article describes development of an ultrafine-grained magnesium alloy with an extraordinary strength and ductility combination, exceptional high specific strength, zero yield strength asymmetry and excellent high strain rate superplasticity.
Date: January 29, 2020
Creator: Panigrahi, S. K.; Mishra, Rajiv; Brennan, R.C. & Cho, K. C.
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
Can a simple topological-constraints-based model predict the initial dissolution rate of borosilicate and aluminosilicate glasses? (open access)

Can a simple topological-constraints-based model predict the initial dissolution rate of borosilicate and aluminosilicate glasses?

This article, as an alternative route to empirical models, shows that a structural descriptor based on the number of topological constraints per atom can be used to predict the initial dissolution rate of aluminosilicate and borosilicate glasses after being parameterized on different families of glasses (specific series of borosilicate glasses). Results show that, provided that corrections are made for high alkali content glasses that dissolve incongruently (preferential release of Na), the model gives reasonable predictions, even far from its training domain.
Date: March 16, 2020
Creator: Gin, Stéphane; Wang, Mengyi; Bisbrouck, Nicolas; Taron, Mélanie; Lu, Xiaonan; Deng, Lu et al.
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
Compostable, fully biobased foams using PLA and micro cellulose for zero energy buildings (open access)

Compostable, fully biobased foams using PLA and micro cellulose for zero energy buildings

Article examining foams made from polylactic acid (PLA) and micro cellulose fibrils (MCF) to address the need for bio-resourced foams for the building industry.
Date: October 20, 2020
Creator: Oluwabunmi, Kayode; D'Souza, Nandika Anne, 1967-; Zhao, Weihuan; Choi, Tae-Youl & Theyson, Thomas
System: The UNT Digital Library
Computational Assessment of Thermokinetics and Associated Microstructural Evolution in Laser Powder Bed Fusion Manufacturing of Ti6Al4V Alloy (open access)

Computational Assessment of Thermokinetics and Associated Microstructural Evolution in Laser Powder Bed Fusion Manufacturing of Ti6Al4V Alloy

This article develops a three-dimensional thermokinetic model based on the finite element method to correlate with the microstructure evolved in additively manufactured Ti6Al4V alloy.
Date: May 5, 2020
Creator: Pantawane, Mangesh V.; Ho, Yee-Hsien; Joshi, Sameehan & Dahotre, Narendra B.
System: The UNT Digital Library
Correlating work hardening with co-activation of stacking fault strengthening and transformation in a high entropy alloy using in-situ neutron diffraction (open access)

Correlating work hardening with co-activation of stacking fault strengthening and transformation in a high entropy alloy using in-situ neutron diffraction

Article using in-situ neutron diffraction to correlate SF strengthening to work hardening behavior in a low SFE Fe40Mn20Cr15Co20Si5 (at%) high entropy alloy, SFE ~ 6.31 mJ m−2. Cooperative activation of multiple mechanisms was indicated by increases in SF strengthening and γ-f.c.c. → ε-h.c.p. transformation leading to a simultaneous increase in strength and ductility. The present study demonstrates the application of in-situ, neutron or X-ray, diffraction techniques to correlating SF strengthening to work hardening.
Date: December 17, 2020
Creator: Frank, M.; Nene, Saurabh S.; Chen, Y.; Gwalani, B.; Kautz, E. J.; Devaraj, A. et al.
System: The UNT Digital Library
Correlation between bonding, vacancy migration mechanisms, and creep in model binary and ternary hcp-Mg solid solutions (open access)

Correlation between bonding, vacancy migration mechanisms, and creep in model binary and ternary hcp-Mg solid solutions

Article compares in-plane (IP) and out-of-plane (OOP) vacancy migration mechanisms in binary Mg–X (Ca, Y, and Gd) and ternary Mg–X (Ca, Y, and Gd)–Zn alloys using density functional theory based first principles computations.
Date: October 13, 2020
Creator: Paranjape, Priyanvada; Srinivasan, S. G. & Choudhuri, Deep
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
Dynamic Shear Deformation of a Precipitation Hardened Al0.7CoCrFeNi Eutectic High-Entropy Alloy Using Hat-Shaped Specimen Geometry (open access)

Dynamic Shear Deformation of a Precipitation Hardened Al0.7CoCrFeNi Eutectic High-Entropy Alloy Using Hat-Shaped Specimen Geometry

The article reports on the shear deformation of a eutectic structured HEA and effect of precipitation on shear deformation, particularly Al₀.₇CoCrFeNi high-entropy alloy (HEA). A split-Hopkinson pressure bar (SHPB) was used to compress the hat-shaped specimens to study the local dynamic shear response of the alloy. The change in the width of shear bands with respect to precipitation and deformation rates was studied. The precipitation of L1₂ phase did not delay the formation of adiabatic shear bands (ASB) or affect the ASB width significantly, however, the deformed region around ASB, consisting of high density of twins in fcc phase, was reduced from 80 µm to 20 µm in the stronger precipitation strengthened condition.
Date: April 10, 2020
Creator: Gwalani, Bharat; Wang, Tianhao; Jagetia, Abhinav; Gangireddy, Sindhura; Muskeri, Saideep; Mukherjee, Sundeep et al.
System: The UNT Digital Library
Editorial: Catalysts for Clean Energy Conversion and Storage (open access)

Editorial: Catalysts for Clean Energy Conversion and Storage

An introduction to a series of research articles submitted on the topic of "Catalysts for Clean Energy Conversion and Storage".
Date: February 21, 2020
Creator: Xia, Zhenhai & Xiang, Zhonghua
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
Embedded Corrosion Sensing with ZnO-PVDF Sensor Textiles (open access)

Embedded Corrosion Sensing with ZnO-PVDF Sensor Textiles

Article investigating a non-conductive sensor textile as a viable solution for corrosion in underground and submerged steel pipes. The results offer a new option for sub-surface corrosion sensing using low cost, easily fabricated sensor textiles.
Date: May 28, 2020
Creator: Chowdhury, Tonoy; D'Souza, Nandika Anne, 1967-; Ho, Yee-Hsien; Dahotre, Narendra B. & Mahbub, Ifana
System: The UNT Digital Library
Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination (open access)

Engineering transformation pathways in an Al0.3CoFeNi complex concentrated alloy leads to excellent strength–ductility combination

Article reports a novel multi-phase microstructure in a HEA/CCA similar to the microstructure observed in dual-phase stainless steel.
Date: July 2, 2020
Creator: Dasari, S.; Jagetia, Abhinav; Soni, V.; Gwalani, Bharat; Banerjee, Rajarshi & Gorsse, Stéphane
System: The UNT Digital Library
Fabrication and characterization of inkjet-printed 2D perovskite optoelectronic devices (open access)

Fabrication and characterization of inkjet-printed 2D perovskite optoelectronic devices

Article presents the large scale synthesis of solution-processed 2D (CH₃(CH₂)₃NH₃)₂(CH₃NH₃)ₙ − 1PbₙI₃ₙ + 1 (n = 2, 3, and 4) perovskites, a family of layered compounds with composition-tunable bandgap, where inkjet printing was used to fabricate heterostructure, flexible photodetector devices. The flexible, inkjet-printed perovskite 2D heterostructures have significant potential for optoelectronic devices, which can enable broad possibilities with compositional tunability and versatility of the organohalide perovskites.
Date: August 24, 2020
Creator: Min, Misook; Hossain, Ridwan F.; Ma, Liang-Chieh & Kaul, Anupama
System: The UNT Digital Library
Hierarchical Eutectoid Nano-lamellar Decomposition in an Al0.3CoFeNi Complex Concentrated Alloy (open access)

Hierarchical Eutectoid Nano-lamellar Decomposition in an Al0.3CoFeNi Complex Concentrated Alloy

Article discusses a novel eutectoid nano-lamellar (FCC + L12)/(BCC + B2) microstructure that has been discovered in a relatively simple Al0.3CoFeNi high entropy alloy (HEA) or complex concentrated alloy (CCA).
Date: March 16, 2020
Creator: Dasari, Sriswaroop; Gwalani, Bharat; Jagetia, Abhinav; Soni, V.; Gorsse, Stéphane & Banerjee, Rajarshi
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
High-Temperature Nano-Indentation Creep of Reduced Activity High Entropy Alloys Based on 4-5-6 Elemental Palette (open access)

High-Temperature Nano-Indentation Creep of Reduced Activity High Entropy Alloys Based on 4-5-6 Elemental Palette

In this article the time-dependent plastic deformation behavior of two refractory high entropy alloys was investigated, namely HfTaTiVZr and TaTiVWZr. These alloys are based on reduced activity metals from the 4-5-6 elemental palette that would allow easy post-service recycling after use in nuclear reactors. The creep behavior was investigated using nano-indentation over the temperature range of 298 K to 573 K under static and dynamic loads up to 5 N.
Date: February 18, 2020
Creator: Sadeghilaridjani, Maryam; Muskeri, Saideep; Pole, Mayur & Mukherjee, Sundeep
System: The UNT Digital Library
Hole-punching for enhancing electrocatalytic activities of 2D graphene electrodes: Less is more (open access)

Hole-punching for enhancing electrocatalytic activities of 2D graphene electrodes: Less is more

Article develops 2D carbon electrocatalysts based on graphene with and without punched holes and/or N-doping and performs a comprehensive combined experimental and theoretical study on the edge and surface electrocatalytic activities of single-layer 2D graphene sheets.
Date: August 17, 2020
Creator: Xia, Zhenhai; Gao, Yunxiang; Zhang, Lipeng; Li, Chang Ming & Dai, Liming
System: The UNT Digital Library
Hydrogen bonding interactions of H2O and SiOH on a boroaluminosilicate glass corroded in aqueous solution (open access)

Hydrogen bonding interactions of H2O and SiOH on a boroaluminosilicate glass corroded in aqueous solution

This article simulates hydrous species (H2O and Si-OH) on nano-porous alteration layers (gels) formed on a boroaluminosilicate glass called International Simple Glass corroded in aqueous solutions at pH 7 and pH 9, and initially saturated with soluble silicon-containing species were analyzed using linear and non-linear vibrational spectroscopy in combination with molecular dynamics simulations. The simulation and experimental results obtained in this study indicate that the water mobility in the gel formed at pH 9 could be slower than that in the gel formed at pH 7, and as a result, the leaching rate at pH 9 is slower than that at pH 7.
Date: January 7, 2020
Creator: Ngo, Dien; Liu, Hongshen; Chen, Zhe; Huseyin, Kaya; Zimudzi, Tawanda J.; Gin, Stéphane et al.
System: The UNT Digital Library
In-vitro biomineralization and biocompatibility of friction stir additively manufactured AZ31B magnesium alloy-hydroxyapatite composites (open access)

In-vitro biomineralization and biocompatibility of friction stir additively manufactured AZ31B magnesium alloy-hydroxyapatite composites

Article presents research where friction stir additive manufacturing technique was employed to fabricate AZ31B magnesium-hydroxyapatite composite. The study aims to evaluate effect of hydroxyapatite (HA, Ca₁₀(PO₄)₆OH₂), a ceramic similar to natural bone, into AZ31B Mg alloy matrix on biomineralization and biocompatibility.
Date: June 30, 2020
Creator: Ho, Yee-Hsien; Man, Kun; Joshi, Sameehan; Pantawane, Mangesh V.; Wu, Tso-Chang; Yang, Yong et al.
System: The UNT Digital Library
Inkjet-printed MoS₂-based field-effect transistors with graphene and hexagonal boron nitride inks (open access)

Inkjet-printed MoS₂-based field-effect transistors with graphene and hexagonal boron nitride inks

This article reports the design, fabrication, and characterization of an all inkjet-printed field-effect transistor (FET).
Date: July 10, 2020
Creator: Hossain, Ridwan F. & Kaul, Anupama
System: The UNT Digital Library
Inks of dielectric h-BN and semiconducting WS₂ for capacitive structures with graphene (open access)

Inks of dielectric h-BN and semiconducting WS₂ for capacitive structures with graphene

This article presents dispersions of WS₂ and h-BN using cyclohexanone and terpineol as the solvent to subsequently print prototype capacitive nanodevices.
Date: July 30, 2020
Creator: Desai, Jay A.; Mazumder, Sangram; Hossain, Ridwan Fayaz & Kaul, Anupama
System: The UNT Digital Library