Preparation of high-mechanical-property medium-entropy CrCoNi alloy by asymmetric cryorolling

Yu-zeWU,Zhao-yangZHANG,JuanLIU,CharlieKONG,YuWANG,PuneetTANDON,AlexanderPESIN,Hai-liangYU,

doi:10.1016/S1003-6326(22)65893-X

Transactions of Nonferrous Metals Society of China >

2022 , Vol. 32 >Issue 5: 1559 - 1574

DOI: https://doi.org/10.1016/S1003-6326(22)65893-X

Materials Science and Engineering

Preparation of high-mechanical-property medium-entropy CrCoNi alloy by asymmetric cryorolling

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Yu-ze WU^1,2,3, Zhao-yang ZHANG^1,2,3, Juan LIU^1,2,3, Charlie KONG⁴, Yu WANG⁴, Puneet TANDON⁵, Alexander PESIN⁶, Hai-liang YU^1,2,3

1. State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China;
2. College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China;
3. Light Alloys Research Institute, Central South University, Changsha 410083, China;
4. Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia;
5. PDPM Indian Institute of Information Technology, Design and Manufacturing, Jabalpur 482005, India;
6. Laboratory of Mechanics of Gradient Nanomaterials, Nosov Magnitogorsk State Technical University, Magnitogorsk 455000, Russia

Online published: 2022-05-25

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Abstract

In order to obtain good strength-plasticity synergy for a medium entropy alloy (MEA) CrCoNi, cold rolling, asymmetric rolling, cryorolling and asymmetric-cryorolling with subsequent annealing at different temperatures were conducted. The results showed that the asymmetric-cryorolled alloy achieved a high strength of over 1.6 GPa. After annealing at 1073 K, it retained a high strength of ~1 GPa while the elongation reached nearly 60%. After annealing, the heterogeneous characteristics were formed in asymmetric-cryorolled samples, which were found to be more distinct than those of the samples subjected to asymmetric rolling. This resulted in the generation of high strength and ductility.

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Yu-zeWU,Zhao-yangZHANG,JuanLIU,CharlieKONG,YuWANG,PuneetTANDON,AlexanderPESIN,Hai-liangYU, . Preparation of high-mechanical-property medium-entropy CrCoNi alloy by asymmetric cryorolling[J]. Transactions of Nonferrous Metals Society of China, 2022 , 32(5) : 1559 -1574 . DOI: 10.1016/S1003-6326(22)65893-X

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