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Tuning the temperature range of superelastic Ni-Ti alloys for elastocaloric cooling via thermal processing

Description: Article describes how caloric cooling enlisting solid-state refrigerants is potentially a promising eco-friendly alternative to conventional cooling based on vapor compression. Here, the authors have explored tuning the operation temperature range of Ni50.8Ti49.2 for elastocaloric cooling. In particular, they have studied the effect of thermal treatments (a.k.a. aging) on the transformation temperature, superelasticity, and elastocaloric effects of Ni50.8Ti49.2 shape memory alloy tubes.
Date: April 28, 2023
Creator: Yamazaki, Takahiro; Montagnoli, Andre L.; Young, Marcus L. & Takeuchi, Ichiro
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Partner: UNT College of Engineering
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Room and Elevated Temperature Sliding Friction and Wear Behavior of Al0.3CoFeCrNi and Al0.3CuFeCrNi2 High Entropy Alloys

Description: Article discusses how, in this study, processing–structure–property relations were systematically investigated at room and elevated temperatures for two FCC Al0.3CoFeCrNi and Al0.3CuFeCrNi2 high-entropy alloys (HEAs), also known as complex concentrated alloys (CCAs), prepared by conventional arc-melting. It was determined that both alloys exhibit FCC single-phase solid solution structure. Micro-indentation and sliding wear tests were performed to study the hardness and tribological behavior and… more
Date: April 2, 2023
Creator: Kadhim, Dheyaa F.; Korcherla, Manindra V. & Scharf, Thomas W.
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Partner: UNT College of Engineering
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Light Confinement in Twisted Single-Layer 2D+ Moiré Photonic Crystals and Bilayer Moiré Photonic Crystals

Description: Article reporting optical properties of twisted single-layer 2D+ moiré photonic crystals where there is a weak modulation in z direction, and bilayer moiré-overlapping-moiré photonic crystals. This study leads to a potential application of 2D+ moiré photonic crystal in future on-chip optoelectronic integration.
Date: December 25, 2023
Creator: Kamau, Steve; Hurley, Noah; Kaul, Anupama; Cui, Jingbiao & Lin, Yuankun
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Partner: UNT College of Engineering
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Tribocatalytically-active nickel/cobalt phosphorous films for universal protection in a hydrocarbon-rich environment

Description: Article describes how high-contact stresses generated at the sliding interfaces during their relative movement provide a unique combination of local heating and shear- and load-induced compression conditions. The authors of the article employ the electrodeposition process to design a coating composed of a hard cobalt-phosphorous matrix with the inclusion of tribocatalytically-active nickel clusters.
Date: July 5, 2023
Creator: Shirani, Asghar; Al Sulaimi, Rawan; Macknojia, Ali Zayaan; Eskandari, Mohammad & Berman, Diana
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Partner: UNT College of Engineering
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MXene/graphene oxide nanocomposites for friction and wear reduction of rough steel surfaces

Description: Article describes how development of solid lubricant materials that render reliable performance in ambient conditions, are amenable to industrial size and design complexities, and work on engineered surfaces is reported. This report presents the holistic exploration and correlation of structure-property-processing pertaining to the advancement of solid lubrication science.
Date: July 8, 2023
Creator: Macknojia, Ali Zayaan; Ayyagari, Aditya; Shevchenko, Elena V. & Berman, Diana
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Partner: UNT College of Engineering
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Ideal plasticity and shape memory of nanolamellar high-entropy alloys

Description: Article describes how understanding the relationship among elemental compositions, nanolamellar microstructures, and mechanical properties enables the rational design of high-entropy alloys (HEAs). In this article the authors construct nanolamellar Alx-CoCuFeNi HEAs with alternating high- and low-Al concentration layers and explore their mechanical properties using a combination of molecular dynamic simulation and density functional theory calculation.
Date: October 13, 2023
Creator: Chen, Shuai; Liu, Ping; Pei, Qingxiang; Yu, Zhi Gen; Aitken, Zachary H.; Li, Wanghui et al.
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Partner: UNT College of Engineering
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Underlying factors determining grain morphologies in high-strength titanium alloys processed by additive manufacturing

Description: Article describes how, in recent research, additions of solute to Ti and some Ti-based alloys have been employed to produce equiaxed microstructures when processing these materials using additive manufacturing. The present study develops a computational scheme for guiding the selection of such alloying additions, and the minimum amounts required, to effect the columnar to equiaxed microstructural transitions.
Date: June 6, 2023
Creator: Nartu, Mohan S. K. K. Y.; Welk, Brian A.; Mantri, Srinivas Aditya; Taylor, Nevin L.; Viswanathan, Gopal B.; Dahotre, Narendra B. et al.
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Partner: UNT College of Engineering

Plexcitonic interactions in spherical and bi-pyramidical Au nanoparticles with monolayer WSeâ‚‚

Description: Article describes how plasmons associated with zero-dimensional (0D) metal nanoparticles and their synergistic interactions with excitons in two-dimensional (2D) semiconductors offer opportunities for remarkable spectral tunability not otherwise evident in the pristine parent materials, which necessitates an in-depth study elucidating the nature of the plasmonic and excitonic interactions, jointly referred to as plexcitons in order to understand the foundational aspects of the light–matter inte… more
Date: November 15, 2022
Creator: Jayanand, Kishan & Kaul, Anupama
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Partner: UNT College of Engineering
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Planar shock compression of spark plasma sintered B4C and B4C-TiB2 ceramic composites

Description: Article describes how blending of ceramic constituent phases enhances sinterability and performance in high strength ceramics. The authors describe how a near fully dense blended boron carbide (B4C)-titanium diboride (TiB2) composite produced through spark plasma sintering (SPS) is probed to understand the mechanical performance under dynamic uniaxial strain, or shock compression.
Date: January 24, 2024
Creator: Turnage, Scott A.; Clayton, John D.; Rodriguez, Jonathan; Scharf, Thomas W. & Williams, Cyril L.
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Partner: UNT College of Engineering
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Multimodal and multiscale strengthening mechanisms in Al-Ni-Zr-Ti-Mn alloy processed by laser powder bed fusion additive manufacturing

Description: Article describes how the unique thermokinetics of laser-powder bed fusion additive manufacturing has been exploited for development of a novel high strength Al-Ni-Ti-Zr-Mn alloy. The authors say that the addition of 0.5 wt% Mn leads to extraordinary improvement in ultimate tensile strength (502 MPa) and work hardening due to the activation of two Mn-induced strengthening mechanisms
Date: December 29, 2023
Creator: Dhal, Abhijeet; Thapliyal, Saket; Agrawal, Priyanka; Roy, Ankita; Sharma, Aishani; Mishra, R. S. et al.
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Partner: UNT College of Engineering
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Accessibility and Mechanical Stability of Nanoporous Zinc Oxide and Aluminum Oxide Coatings Synthesized via Infiltration of Polymer Templates

Description: Article describes how the conformal nanoporous inorganic coatings with accessible pores that are stable under applied thermal and mechanical stresses represent an important class of materials used in the design of sensors, optical coatings, and biomedical systems. Authors synthesize porous AlOx and ZnO coatings by the sequential infiltration synthesis (SIS) of two types of polymers that enable the design of porous conformal coatings.
Date: October 14, 2023
Creator: Omotosho, Khalil D.; Lyon, Zachary; Shevchenko, Elena V. & Berman, Diana
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Partner: UNT College of Engineering
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Highly Pseudocapacitive Storage Design Principles of Heteroatom-Doped Graphene anode in Calcium-Ion Batteries

Description: Article describes how pseudocapacitive storage of multivalent ions, especially Ca2+, in heteroatom-doped carbon nanomaterials is promising to achieve both high energy and power densities, but there is the lack of pseudocapacitive theories that enable rational design of the materials for calcium-ion batteries.
Date: August 22, 2023
Creator: Gao, Yong; Li, Zhenglong; Weng, Pan; Cui, Wengang; Wang, Xiaowei; Yang, Yaxiong et al.
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Partner: UNT College of Engineering
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Effect of Cu and Ni Inclusion on Tribological Performance of Tribocatalytically Active Coatings in Hydrocarbon Environments

Description: Article describes how protective coatings are important for enhancing tribological behavior, preventing surface degradation, and reducing friction-induced energy losses during the operation of mechanical systems. The authors study the effect of catalytic metals, specifically their compositions and amount, on the tribocatalysis process.
Date: December 31, 2023
Creator: Sulaimi, Rawan Al; Eskandari, Mohammad; Shirani, Asghar; Macknojia, Ali Zayaan; Miller, Wesley & Berman, Diana
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Partner: UNT College of Science
open access

Molten Salt Corrosion Behavior of Dual-Phase High Entropy Alloy for Concentrating Solar Power Systems

Description: Article describes how dual-phase high entropy alloys have recently attracted widespread attention as advanced structural materials due to their unique microstructure, excellent mechanical properties, and corrosion resistance. The molten salt corrosion behavior of AlCoCrFeNi2.1 eutectic high-entropy alloy was evaluated in molten NaCl-KCl-MgCl2 salt at 450° C and 650° C in comparison to conventional duplex stainless steel 2205.
Date: February 4, 2023
Creator: Patel, Kunjal; Hasannaeimi, Vahid; Sadeghilaridjani, Maryam; Muskeri, Saideep; Mahajan, Chaitanya & Mukherjee, Sundeep
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Partner: UNT College of Engineering
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Phase-Specific Damage Tolerance of a Eutectic High Entropy Alloy

Description: Article describes how phase-specific damage tolerance was investigated for the AlCoCrFeNi2.1 high entropy alloy with a lamellar microstructure of L12 and B2 phases. Distinct differences in micro-scale deformation mechanisms were reflected in post-compression fractography, with L12-phase cantilevers showing typical characteristics of ductile failure, including the activation of multiple slip lanes, shear lips at the notch edge, and tearing inside the notch versus quasi-cleavage fracture with cle… more
Date: November 30, 2023
Creator: Jha, Shristy; Mishra, R. S. & Mukherjee, Sundeep
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Partner: UNT College of Engineering
open access

Boosting Piezoelectricity by 3D Printing PVDF-MoS2 Composite as a Conformal and High-Sensitivity Piezoelectric Sensor

Description: Article describes how additively manufactured flexible and high-performance piezoelectric devices are highly desirable for sensing and energy harvesting of 3D conformal structures. This study reports a significantly enhanced piezoelectricity in polyvinylidene fluoride (PVDF) achieved through the in situ dipole alignment of PVDF within PVDF-2D molybdenum disulfide composite by 3D printing.
Date: June 21, 2023
Creator: Islam, M.D, Nurul; Rupom, Rifat Hasan; Adhikari, Pashupati R.; Demchuk, Zoriana; Popov, Ivan; Sokolov, Alexei P. et al.
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Partner: UNT College of Engineering
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