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Erschienen in:

2018 | OriginalPaper | Buchkapitel

Mechanical Properties and Shear Localization of High Entropy Alloy CoCrFeMnNi Prepared by Powder Metallurgy

verfasst von : Bingfeng Wang, Xiaoxia Huang, Yong Liu, Bin Liu

Erschienen in: TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings

Verlag: Springer International Publishing

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Abstract

Mechanical properties of the CoCrFeMnNi high entropy alloy at strain rates (1 × 10⁻⁴ s⁻¹ to 0.1 s⁻¹ and 1 × 10³ s⁻¹ to 3 × 10³ s⁻¹) and at temperatures (298.15, 673.15 and 1073.15 K) are investigated. Hat shaped specimens are used to induce the formation of an adiabatic shear band under controlled shock-loading tests. Results indicate that the yield strength of the CoCrFeMnNi high entropy alloy is increasing sensitively with increasing the strain rates. Grains in the boundary of the shear band in the CoCrFeMnNi high entropy alloy are highly elongated along the shear direction, and the core of the shear band consists of nanotwins and ultrafine equiaxed grains. Rotational dynamic recrystallization takes effects on the formation of the microstructures in the shear band.

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Titel: Mechanical Properties and Shear Localization of High Entropy Alloy CoCrFeMnNi Prepared by Powder Metallurgy
verfasst von: Bingfeng Wang
Xiaoxia Huang
Yong Liu
Bin Liu
Verlag: Springer International Publishing
Buch: TMS 2018 147th Annual Meeting & Exhibition Supplemental Proceedings
Print ISBN: 978-3-319-72525-3

Electronic ISBN: 978-3-319-72526-0

Copyright-Jahr: 2018
DOI: https://doi.org/10.1007/978-3-319-72526-0_44

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