首页|The annealing induced formation of epsilon martensite in CoCrNi medium-entropy alloy after severe plastic deformation

The annealing induced formation of epsilon martensite in CoCrNi medium-entropy alloy after severe plastic deformation

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  • NSTL
  • Elsevier
This study reports the formation of the ε-martensite phase induced by post-deformation annealing (PDA) after severe plastic deformation in the equiatomic CoCrNi medium-entropy alloy. This ε-martensite phase was identified by analyzing the microstructure and the magnetic properties. It was found that after three passes of equal-channel angular pressing (ECAP), annealing at 500 °C or 600 °C induces a clear ε-martensite phase without recrystallization, while upon increasing the annealing temperature to above the recrystallization temperature, i.e., 700 °C or 800 °C, the ε-martensite phase gradually disappears. In addition, the hardness and creep behavior during PDA were investigated via nanoindentation. A different creep behavior before and after recrystallization was observed. The possible formation mechanism of this martensitic transformation is discussed.

CoCrNiCreep behaviorMagnetic propertiesMedium-entropy alloyε-martensite

Deng H.W.、Du W.Y.、Liu Z.Y.、Zhang T.、Li H.、Liu B.、Jing K.、Xie Z.M.

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School of Physics and Materials Science Research Center for Advanced Information Materials (CAIM) Guang Zhou University

State Key Laboratory of Powder Metallurgy Central South University

Key Laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences

2022

10.1016/j.jallcom.2021.163349

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.899
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