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
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
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
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
Laser surface engineering of B4C/Fe nano composite coating on low carbon steel: Experimental coupled with computational approach (open access)

Laser surface engineering of B4C/Fe nano composite coating on low carbon steel: Experimental coupled with computational approach

Article describes a study where laser surface engineering was successfully used to engineer a nano carbide composite coating on a low carbon steel substrate.
Date: February 19, 2020
Creator: Salloom, Riyadh; Joshi, Sameehan; Dahotre, Narendra B. & Srinivasan, S. G.
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
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
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
Tomographic mapping of the nanoscale water-filled pore structure in corroded borosilicate glass (open access)

Tomographic mapping of the nanoscale water-filled pore structure in corroded borosilicate glass

This article applies cryo-based atom probe tomography to directly reveal the water-solid interface and hydrated corrosion layers making up the nanoscale porous structure of a corroded borosilicate glass in its native aqueous environment. The analysis includes morphology and compositional mapping of the inner gel/glass interface, isolation of a tomographic sub-volume of the tortuous water-filled gel, and comparison of the gel structure with simulations.
Date: March 18, 2020
Creator: Perea, Daniel E.; Schreiber, Daniel K.; Ryan, Joseph V.; Wirth, Mark G.; Deng, Lu; Lu, Xiaonan et al.
System: The UNT Digital Library
Soft crystal martensites: An in situ resonant soft x-ray scattering study of a liquid crystal martensitic transformation (open access)

Soft crystal martensites: An in situ resonant soft x-ray scattering study of a liquid crystal martensitic transformation

Article presents an in-depth discussion of liquid crystal blue phases (BPs).
Date: March 27, 2020
Creator: Min Jin, Hyeong; Li, Xaio; Dolan, James A.; Kline, R. Joseph; Martínez-González, José A.; Ren, Jiaxing et al.
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
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
International Journal of Lightweight Materials and Manufacture (open access)

International Journal of Lightweight Materials and Manufacture

This article employs a recently introduced magnesium-samarium oxide (Mg–Sm₂O₃) nanocomposite, with different volume fractions of nanosize Sm₂O₃ particles as reinforcement, to study ambient temperature rate-dependent plastic response of the material.
Date: May 11, 2020
Creator: Hasannaeimi, Vahid; Mukherjee, Sundeep; Haghshenas, M.; Song, X. & Gupta, D.
System: The UNT Digital Library
Light–matter interactions in two-dimensional layered tungsten diselenide for gauging evolution of phonon dynamics (open access)

Light–matter interactions in two-dimensional layered tungsten diselenide for gauging evolution of phonon dynamics

Article exploring phonon dynamics in mechanically exfoliated two-dimensional WSe₂ using temperature-dependent and laser-power-dependent Raman and photoluminescence (PL) spectroscopy. The work reported sheds fundamental insights into the evolution of phonon dynamics in WSe₂ and should help pave the way for designing high-performance electronic, optoelectronic and thermoelectric devices in the future.
Date: May 12, 2020
Creator: Bandyopadhyay, Avra S.; Biswas, Chandan & Kaul, Anupama
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
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
Rapid thermokinetics driven nanoscale vanadium clustering within martensite laths in laser powder bed fused additively manufactured Ti6Al4V (open access)

Rapid thermokinetics driven nanoscale vanadium clustering within martensite laths in laser powder bed fused additively manufactured Ti6Al4V

Article reports the computational approach adopted for thermo-diffusion kinetics to rationalize homogenously distributed nanoscale vanadium-rich clusters formed within the martensite laths of Ti6Al4V alloy printed using laser powder bed fusion at an energy density of 52.08J/mm³.
Date: June 1, 2020
Creator: Pantawane, Mangesh V.; Dasari, Sriswaroop; Mantri, Srinivas Aditya; Banerjee, Rajarshi & Dahotre, Narendra B.
System: The UNT Digital Library
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
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
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
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
Prolate and oblate chiral liquid crystal spheroids (open access)

Prolate and oblate chiral liquid crystal spheroids

Article examining the palette of morphologies that arises when microdroplets are deformed into nonspherical shapes in a controllable manner. Specifically, geometrical confinement and mechanical strain are used to manipulate orientational order, phase transitions, and topological defects that arise in chiral liquid crystal droplets. The reported structures and assemblies offer potential for applications in smart coatings, smart fabrics, and wearable sensors.
Date: July 10, 2020
Creator: Sadati, Monirosadat; Martínez-González, José A.; Zhou, Ye; Qazvini, Nader Taheri; Kurtenbach, Khia; Li, Xiao et al.
System: The UNT Digital Library
Microstructurally flexible high entropy alloys: Linkages between alloy design and deformation behavior (open access)

Microstructurally flexible high entropy alloys: Linkages between alloy design and deformation behavior

Article presents research where metastability based alloy design led to flexible microstructural evolution in which either thermodynamically stable γ-phase or unstable ε-phase was obtained at room temperature.
Date: July 19, 2020
Creator: Nene, Saurabh S.; Frank, M.; Agrawal, P.; Sinha, Subhasis; Liu, Kaimiao; Shukla, Shivakant et al.
System: The UNT Digital Library