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open access

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.
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Engineering
open access

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.
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Engineering
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
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Science
open access

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.
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.
Partner: UNT College of Engineering
open access

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.
Partner: UNT College of Engineering
open access

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.
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Engineering
open access

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.
Partner: UNT College of Engineering
open access

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
Partner: UNT College of Engineering
open access

Dynamic Motions of Topological Defects in Nematic Liquid Crystals under Spatial Confinement

Description: Article discusses how topological defects (TDs) have become a sensational topic due to their significant influence on the unusual optical and physiochemical characteristics of the material. Here, authors assert how nematic liquid crystals confined in a cell exhibiting surfaces with periodic anchoring conditions containing surface topography are relied on.
Date: April 25, 2023
Creator: Pawale, Tejal; Swain, Justin; Hashemi, Mohammad Reza; Tierra, Giordano & Li, Xiao
Partner: UNT College of Science
open access

A Critical Review of Laser Shock Peening of Aircraft Engine Components

Description: Article describes how many aviation accidents are caused by the failure of aircraft engine components, and engine blades are especially vulnerable to high-cycle fatigue fracture in severe working environments as well as to impact damage caused by foreign objects. This review provides an overview of the development of LSP for use in treating aircraft engine components over the past three decades, with a brief introduction to the development of high-energy pulsed lasers for LSP.
Date: May 3, 2023
Creator: Ye, Yixuan; Zhang, Yu; Huang, Tao; Zou, Shikun; Dong, Yalin; Ding, Han et al.
Partner: UNT College of Engineering
open access

Laser powder bed fusion processing of a precipitation strengthenable FCC based high entropy alloy

Description: Article describes how, while additive manufacturing (AM) of single-phase solid solution based high entropy alloys (HEAs) has attracted a lot of recent attention, such processing of precipitation strengthenable multi-phase HEAs has not been actively investigated. This becomes important since AM processing results in each layer experiencing rapid solidification followed by multiple heating-cooling cycles, mimicking in situ heat treatments, potentially influencing the phase evolution.
Date: March 21, 2023
Creator: Chesetti, Advika; Banerjee, Sucharita; Dasari, Sriswaroop; Varahabhatla, S.M.; Sharma, Abhishek; Mantri, Srinivas Aditya et al.
Partner: UNT College of Engineering
open access

Mapping hierarchical and heterogeneous micromechanics of a transformative high entropy alloy by nanoindentation and machine learning augmented clustering

Description: Article describes how conventional macromechanical tests provide limited insights into complex hierarchical deformation behavior of a transformative high entropy alloy (HEA). In this work, a high throughput microstructure-micromechanical correlative study is presented by combining high-resolution nanoindentation, site-specific microscopy, and Gaussian mixture model (GMM) clustering.
Date: April 26, 2023
Creator: Dhal, Abhijeet; Haridas, Ravi Sankar; Agrawal, Priyanka; Gupta, Sanya & Mishra, R. S.
Partner: UNT College of Engineering
open access

Deformation behavior and strengthening effects of an eutectic AlCoCrFeNi2.1 high entropy alloy probed by in-situ synchrotron X-ray diffraction and post-mortem EBSD

Description: Article describes how high energy synchrotron X-ray diffraction was used during tensile testing of an as-cast eutectic AlCoCrFeNi2.1 high entropy alloy. The authors determine for the first time the volume fractions of existing phases, and they further detail their role on the alloy deformation behavior.
Date: March 27, 2023
Creator: Shen, Jiajia; Lopes, J.G.; Zeng, Zhi; Choi, Yeon Taek; Maawad, E.; Schell, N. et al.
Partner: UNT College of Engineering
open access

Evolution of microstructure and mechanical properties in gas tungsten arc welded dual-phase Fe50Mn30Co10Cr10 high entropy alloy

Description: Article describes how in recent years, high entropy alloys (HEAs) have been shown to be promising alternatives to common engineering alloys, depending on their composition and thermomechanical processing. In the present work, Gas Tungsten Arc Welding (GTAW) was used to achieve defect-free joints based on a novel transformation induced plasticity (TRIP) Fe50Mn30Co10Cr10 HEA.
Date: June 3, 2023
Creator: Lopes, J. G.; Agrawal, Priyanka; Shen, Jiajia; Schell, N.; Mishra, R. S. & Oliveira, J. P.
Partner: UNT College of Science
open access

A Phosphonic Functionalized Biopolymer for the Sorption of Lanthanum (III) and Application in the Recovery of Rare Earth Elements

Description: Authors of the article state that in the first step of their experiment, the sorption was investigated using La(III) ions before testing for the recovery of rare earth elements (REEs) from pretreated industrial acidic leachate. They infer that phosphonate groups participate in the sorption, and that the most effective sorption is at pH = 4.
Date: February 3, 2023
Creator: Hamza, Mohammed F.; Abdellah, Walid M.; Zaki, Doaa I.; Wei, Yuezhou; Althumayri, Khalid; Brostow, Witold, 1934- et al.
Partner: UNT College of Engineering
open access

Quantitative estimation of closed cell porosity in low density ceramic composites using X-ray microtomography

Description: Article asserts that x-ray Microtomography is a proven tool for phase fraction analysis of multi-phase systems, provided that each phase is adequately partitioned by some means of data processing. The authors present a novel, combined methodology for accurate porosity analysis—despite these shortcomings.
Date: January 4, 2023
Creator: Smith, J. D.; Garcia, C.; Rodriguez, J. & Scharf, T. W.
Partner: UNT College of Engineering
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