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Effective and back stresses evolution upon cycling a high-entropy alloy

Lu, K and Chauhan, A and Knöpfle, F and Aktaa, J (2022) Effective and back stresses evolution upon cycling a high-entropy alloy. In: Materials Research Letters, 10 (6). pp. 369-376.

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Official URL: https://doi.org/10.1080/21663831.2022.2054667


We report on the effective and back stresses evolution of a CoCrFeMnNi high-entropy alloy (HEA) by partitioning its cyclic hysteresis loops. It was found that the cyclic stress response of the HEA predominantly originates from the back stress evolution. Back stress also increases significantly with increasing strain amplitude and reducing grain size. However, the change of effective stress is rather insignificant with altering cycle number, strain amplitude and grain size. This indicates that the effective stress is determined mainly by the lattice friction. Further comparisons to an austenitic steel and a medium-entropy alloy identified the origins of their peculiar cyclic strength. © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Item Type: Journal Article
Publication: Materials Research Letters
Publisher: Taylor and Francis Ltd.
Additional Information: The copyright for this article belongs to authors.
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 18 May 2022 09:38
Last Modified: 18 May 2022 09:38
URI: https://eprints.iisc.ac.in/id/eprint/71845

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