Article
Materials Science, Multidisciplinary
Tamsin E. Whitfield, George J. Wise, Ed J. Pickering, Howard J. Stone, Nicholas G. Jones
Summary: Refractory metal high entropy superalloys are considered as potential new high temperature structural materials with nanoscale cuboidal microstructures. This study investigated the microstructures produced by the Nb-Zr miscibility gap within the simpler Ti-Nb-Zr constituent system, suggesting that Nb-Zr interactions may not play a significant role in the formation of nanoscale cuboidal RSA microstructures during cooling.
Article
Materials Science, Multidisciplinary
Ali Shafiei
Summary: A new method was proposed to predict the compositions of EHEAs in the Al-Co-Cr-Fe-Ni system, by designing new eutectic or near-eutectic alloys through mixing alloys located on the same eutectic line. Compositional maps were created to show the relations between constituent elements in eutectic alloys, suggesting that EHEAs are derived from binary and ternary eutectic alloys. The proposed diagrams can be considered as convenient methods for evaluating the composition of EHEAs in the Al-Co-Cr-Fe-Ni system.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Abhishek Mehta, Yongho Sohn
Summary: Experimental measurements of chemical and tracer diffusion coefficients in Al0.25CoCrFeNi high-entropy alloy suggest that diffusion may not necessarily be sluggish, indicating a more complex diffusion behavior in high-entropy alloys than previously thought.
MATERIALS RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
A. E. Nassar, A. M. Mullis
Summary: Machine learning methods have been used to predict new High-Entropy Alloys, with the neural network model using compositional data performing better, suggesting that abandoning predictive features may be advantageous.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Yung-Chien Huang, Yi-Cheng Lai, Yu-Hsien Lin, Shyi-Kaan Wu
Summary: The study demonstrates that the alloying element Ta significantly decelerates grain boundary migration, thereby hindering grain growth and increasing the activation energy value for grain growth Q(G).
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Mechanical
William M. Williams, Mitra Shabani, Paul D. Jablonski, Garrett J. Pataky
Summary: CoCrFeNi alloy exhibits good steady-state fatigue crack growth resistance at room temperature, with the plastic deformation mechanism transitioning from dislocation slip to the addition of nano-twinning as crack life progresses.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Materials Science, Multidisciplinary
Ahmadreza Riyahi Khorasgani, Julia Kundin, Olga Lukianova, Neelamegan Esakkiraja, Aloke Paul, Sergiy Divinski, Ingo Steinbach
Summary: This study investigates the impact of interstitial carbon on the thermodynamics-kinetics coupling in CoCrFeMnNi-based High Entropy Alloys. Through calculations, modeling, and simulations, the study reveals the mutual influence of carbon and matrix elements diffusion and the non-monotonous dependence of chromium diffusion on carbon content.
Article
Chemistry, Physical
Saadet Guler, Esra Dokumaci Alkan, Murat Alkan
Summary: This study proposes a phase diagram suitable for the AlCoCrFeNiTiX system using ThermoCalc software and compares it with experimental results. The effects of titanium on the microstructure evaluations and phase transformations in high-entropy alloys were investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
J. Cieslak, M. Calvo-Dahlborg, K. Berent, U. Dahlborg
Summary: The investigation of FeCoNiPdx and CrxFeCoNiPd high entropy alloys showed that increasing Pd content in FeCoNiPdx samples only slightly influenced the Mössbauer spectra, while increasing Cr content in CrxFeCoNiPd samples resulted in a strong decrease in hyperfine field intensity. Decomposing the HEAs compositions into binary artificial Fe-dopant systems helped interpret the magnetic structure of the two series studied.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yegi Vamsi Krishna, Ujjawal Kumar Jaiswal, M. R. Rahul
Summary: The study used machine learning to predict a multiphase alloy system SS + IM with high entropy alloys, with Artificial Neural Network (ANN) showing the highest accuracy. Experimental verification confirmed the accuracy of ANN predictions in the alloy system, but also revealed overlapping design parameters hindering successful prediction.
SCRIPTA MATERIALIA
(2021)
Review
Materials Science, Multidisciplinary
B. Cantor
Summary: Multicomponent high-entropy Cantor alloys, discovered in the late 1970s, occupy a vast region of multi-component phase space and exhibit excellent mechanical properties due to high configurational entropy. The complexity of local atomic configurations and associated lattice strains in these alloys contributes to their unique characteristics and potential for further enhancement and optimization.
PROGRESS IN MATERIALS SCIENCE
(2021)
Article
Chemistry, Physical
Hiroyuki Watanabe, Toru Murata, Shunsuke Nakamura, Naoko Ikeo, Toshiji Mukai, Koichi Tsuchiya
Summary: Cold-working was found to facilitate the formation of sigma phase in CrMnFeCoNi alloy under specific heat treatment conditions. The resulting sigma-body-centered cubic (BCC) aggregates consist of sigma phase spines and BCC particles, forming rapidly at the face-centered cubic/sigma interface.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Shangcheng Zhou, Ruizhi Jian, Yao-Jian Liang, Yichao Zhu, Benpeng Wang, Liang Wang, Lu Wang, Yang Ren, Yunfei Xue
Summary: A novel WHA with strong susceptibility to ASB, using a precipitation-hardening HEA as the binding phase of W particles, was reported in this work. The formation of nanoscale L1(2) precipitates and high dislocation density contribute to a high dynamic yield strength of approximately 2300 MPa. Additionally, a narrow ASB with a width of about 12 μm was observed in the novel WHA, showing a great susceptibility to ASB.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wentao Jiang, Xiaohong Wang, Huijun Kang, Bo Jiang, Duo Dong, Ye Wang, Dongdong Zhu
Summary: The effects of Zr on the microstructure and mechanical properties of Al0.5NbTiV2Zrx and Al0.5Nb0.5TiV2Zrx alloys were investigated. It was found that with the increase of Zr content, the matrix phase decreased and the volume fraction of the Laves phase increased, resulting in changes in the mechanical properties of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Multidisciplinary
Mikhail I. Razumovsky, Boris S. Bokstein, Alexey O. Rodin, Alexandra V. Khvan
Summary: The interdiffusion of elements in a diffusion pair of Ti and an equiatomic HEA TiZrHfNbTaMo was investigated in the temperature range of 1473-1673 K. The phase stability of the alloy was determined using the phase diagram obtained from Thermo-Calc 2021-B software. Ti-HEA diffusion pairs were obtained through low-temperature welding followed by diffusion annealing at temperatures of 1473, 1573, and 1673 K for different durations. The interdiffusion zone was analyzed using EPMA, and the diffusion parameters of HEA elements were obtained using Hall's method. Experimental results are discussed.
Article
Materials Science, Multidisciplinary
Sumeet Mishra, Kaustubh Kulkarni, N. P. Gurao
MATERIALS & DESIGN
(2015)
Article
Chemistry, Physical
Vikrant Kumar Beura, Vincent Xavier, T. Venkateswaran, Kaustubh N. Kulkarni
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Materials Science, Multidisciplinary
Sumeet Mishra, Manasij Yadava, Kaustubh N. Kulkarni, N. P. Gurao
MECHANICS OF MATERIALS
(2018)
Article
Chemistry, Physical
Bhupinder Dangi, Tyson W. Brown, Kaustubh N. Kulkarni
JOURNAL OF ALLOYS AND COMPOUNDS
(2018)
Article
Materials Science, Multidisciplinary
Vivek Verma, Aparna Tripathi, Thiruvenkatam Venkateswaran, Kaustubh N. Kulkarni
JOURNAL OF MATERIALS RESEARCH
(2020)
Article
Nanoscience & Nanotechnology
Kaustubh N. Kulkarni
Summary: In this work, an analytical solution was derived for multicomponent diffusion couples with constant interdiffusion coefficients, and successfully applied to reproduce concentration profiles in experimental diffusion couples. The excellent agreement between experimental and theoretical profiles validates the reliability of the closed form solution and highlights the constancy of interdiffusion coefficients in such concentrated multicomponent alloys.
Article
Materials Science, Multidisciplinary
Kaustubh N. Kulkarni
Summary: This study derived a relationship between diffusion flux and chemical potential gradients for a multicomponent system with composition-dependent molar volume, showing that the marker velocity in a diffusion couple experiment includes drift velocity and Kirkendall velocity.
OXFORD OPEN MATERIALS SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
A. Bhargav Krishna, Kaustubh N. Kulkarni