首页|Optimizing transformation-induced plasticity in CoCrNi alloys by combined grain refinement and chemical tuning

Optimizing transformation-induced plasticity in CoCrNi alloys by combined grain refinement and chemical tuning

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  • NSTL
  • Elsevier
Grain refinement increases yield strength, but usually at the cost of ductility reduction. In the present work, we explored the strategy of grain refinement and composition tuning in CoCrNi alloys to optimize mechanical properties. Grain refinement was found to strongly suppress deformation-induced martensitic transformation in metastable CoCrNi alloys, which was utilized to modulate the transformation-induced plasticity (TRIP) effect in combination with composition tuning guided by theoretical calculations. We demonstrated in a non-equiatomic CoCrNi TRIP medium-entropy alloy (MEA) that our approach resulted in an excellent combination of strength and ductility. The proposed strategy is expected to be useful in exploring superior mechanical properties of MEAs and high-entropy alloys in varying systems.

CoCrNi alloysMedium-entropy alloy (MEA)Stacking fault energy (SFE)Ultrafine grain (UFG)Transformation-induced plasticity (TRIP)HIGH-ENTROPY ALLOYSTACKING-FAULT ENERGIESPHASE-TRANSFORMATIONTWINNING BEHAVIORDEFORMATIONDUCTILITYSTRENGTHSIZECU

Gu, Z. J.、Tian, Y. Z.、Xu, W.、Lu, S.、Shang, X. L.、Wang, J. W.、Qin, G. W.

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Northeastern Univ

Royal Inst Technol

GD Midea Air Conditioning Equipment Co Ltd

Zhejiang Univ

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2022

10.1016/j.scriptamat.2022.114658

Scripta materialia

Scripta materialia

EISCI
ISSN：1359-6462
年,卷(期)：2022.214
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