Deformation behaviour and microstructural evolution of high-entropy CoFeMnNi alloy at hot deformation condition with low strain rate
Lihua Du, Jiaai Shi, Jiayu Liang, Kailun Zheng
download PDFAbstract. High-entropy alloy is a promising structural material for high-temperature service applications due to the designable superior properties. Superplasticity, normally achieved at relatively high temperature and low strain rate, enables difficult to formation materials to manufacture complex-shaped parts. This paper presents a feasibility experimental study on the deformation and microstructure of CoFeMnNi high-entropy alloy under hot deformation conditions with low strain rate. A series of hot uniaxial tests were conducted at the temperature range between 800-1000℃ with typical strain rates of 10-4 and 10-5/s to determine the stress-strain behaviours. Additionally, to understand the deformation mechanism, microstructure evolution after deformation was characterized. Finally, a mechanism based constitutive model of high-entropy alloy was developed, which facilities the process optimization by finite element simulations.
Keywords
High-Entropy Alloy, Deformation Behaviour, Super-Plastic Forming, Deformation
Published online , 11 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Lihua Du, Jiaai Shi, Jiayu Liang, Kailun Zheng, Deformation behaviour and microstructural evolution of high-entropy CoFeMnNi alloy at hot deformation condition with low strain rate, Materials Research Proceedings, Vol. 32, pp 253-263, 2023
DOI: https://doi.org/10.21741/9781644902615-29
The article was published as article 29 of the book Superplasticity in Advanced Materials
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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