Evolution of microstructure and properties of CoCrFeMnNi high entropy alloy fabricated by selective laser melting

Zhenhui Wang; Pengcheng Ji; Gang Wang; Yandong Jia; Hui Wang; Xuguang An

doi:10.1515/ijmr-2022-0139

Article

Evolution of microstructure and properties of CoCrFeMnNi high entropy alloy fabricated by selective laser melting

Zhenhui Wang , Pengcheng Ji , Gang Wang , Yandong Jia , Hui Wang and Xuguang An

Published/Copyright: August 10, 2023

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From the journal International Journal of Materials Research Volume 114 Issue 10-11

Abstract

CoCrFeMnNi high entropy alloy was prepared by selective laser melting as a function of processing parameters by adopting the single factor variable method. The influence of process parameters on the microstructure and mechanical properties was investigated in detail. The results show that the alloy maintained a single-phase fcc structure, the microstructure is anisotropic and shows the presence of a high density of dislocations accumulated and entangled inside the grains. The ductility has a significant influence on the level of porosity, which in turn depends on the process parameters. Especially with the variation of hatch spacing, the elongation at break differs by at most 20.9 %.

Keywords: CoCrFeMnNi; High entropy alloy; Mechanical properties; Microstructure; Selective laser melting

Corresponding author: Yandong Jia, School of Materials Science and Engineering, Institute of Materials, Shanghai University, 99 Shangda Road, Baoshan District, Shanghai 200444, P.R. China, E-mail: yandongjia@shu.edu.cn

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: Unassigned

Funding source: Shanghai Municipal Education Commission

Award Identifier / Grant number: Unassigned

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research Funding: This work is supported by the open research fund of Songshan Lake Materials Laboratory (no. 2021SLABFN06), the National Natural Science Foundation of China (Grant numbers 51971123, 51925103, 52201183), the Innovation Program of Shanghai Municipal Education Commission (no. 2021-01-07-00-09-E00114), the financial support from Program 173 (no. 2020-JCIQ-ZD-186-01).
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2022-03-13

Accepted: 2022-06-01

Published Online: 2023-08-10

Published in Print: 2023-10-27

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Articles in the same Issue

https://doi.org/10.1515/ijmr-2022-0139

Keywords for this article

CoCrFeMnNi; High entropy alloy; Mechanical properties; Microstructure; Selective laser melting