Effects of Adiabatic Heating and Strain Rate on the Dynamic Response of a CoCrFeMnNi High-Entropy Alloy
TLDR
In this article, the effects of strain and strain rate on the adiabatic heating and the mechanical behavior of a CoCrFeMnNi high-entropy alloy (HEA) were investigated.Abstract:
This work presents a comprehensive analysis of the effects of strain and strain rate on the adiabatic heating and the mechanical behavior of a CoCrFeMnNi high-entropy alloy (HEA). In this investigation, compression tests were carried out at quasi-static and dynamic strain rates. The temperature of the specimens was measured using high speed infrared thermography. The high strain rate tests were conducted with a Split Hopkinson Pressure Bar, and the tests at lower strain rates were performed using a universal testing machine. The material exhibited a positive strain rate sensitivity, as true stress–strain plots were shifted upwards with the increase in strain rate. With exception of the isothermal tests, temperature rise and the Taylor–Quinney coefficient (β) were noticeably similar for the investigated strain rates. This study shows that the common assumption that β can be considered 0.9 and constant is possibly not very accurate for the CoCrFeMnNi alloy. The β is influenced by at least strain and strain rate.read more
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Deformation mechanisms and texture evolution in high entropy alloy during cold rolling
Lalit Kaushik,Min-Seong Kim,Jaiveer Singh,Joo-Hee Kang,Yoon-Uk Heo,Jin-Yoo Suh,Shi-Hoon Choi +6 more
TL;DR: In this paper, a CoCrFeMnNi high entropy alloy (HEA) was subjected to thickness reductions of 20, 40, and 60% during cold rolling in order to thoroughly investigate the evolutions of both the microstructure and the deformation texture.
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Employing molecular dynamics to shed light on the microstructural origins of the Taylor-Quinney coefficient
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Cold spray deposition characteristic and bonding of CrMnCoFeNi high entropy alloy
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Strain rate sensitive microstructural evolution in a TRIP assisted high entropy alloy: Experiments, microstructure and modeling
Ravi Sankar Haridas,Priyanshi Agrawal,Saket Thapliyal,Surekha Yadav,Rajiv S. Mishra,Brandon McWilliams,Kyu Cho +6 more
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Characteristics of dynamic softening during high temperature deformation of CoCrFeMnNi high-entropy alloy and its correlation with the evolving microstructure and micro-texture
TL;DR: In this paper, the authors investigated the characteristics of dynamic recrystallization (DRX) of a CoCrFeMnNi high-entropy alloy (HEA) via hot compression testing in the temperature range 950-1100 °C and at true strain rates of 10-2 and 10-1 s-1.
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