Cryogenic mechanical behaviors of CrMnFeCoNi high-entropy alloy
Abstract
The CrMnFeCoNi high-entropy alloy (HEA) exhibits higher yield strength, ultimate strength and ductility at lower temperature. To further clarify the effect of the testing temperature on microstructure evolution, in this study in-situ synchrotron-based high-energy X-ray diffraction tensile tests were carried out from 298 K down to 123 K. The enhanced yield strength of the alloy at cryogenic temperatures can be attributed to the greater lattice distortion prior to plastic deformation. Higher strain hardening rate leads to the simultaneously enhanced strength and ductility of the studied HEA below room temperature. Both dynamic Hall-Petch hardening (twinning) and dislocation hardening provide high work hardening capacity for this alloy during the plastic deformation at cryogenic temperatures. The increased dislocation density and nano-twins at cryogenic temperatures can be attributed to the decrease in the stacking fault energy as the deformation temperature decreases. These studies could provide an in-depth understanding for the strengthening mechanisms of the HEA in different temperature conditions and guide the exploration of HEAs with superb mechanical properties at cryogenic environments.
- Authors:
-
- Harbin Inst. of Technology (China)
- Xi'an Space Engine Company Limited (China)
- China Univ. of Petroleum, Beijing, (China)
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Org.:
- USDOE Office of Science (SC); National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1774493
- Grant/Contract Number:
- AC02-06CH11357; 51871076; 51671070; 51827801
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing
- Additional Journal Information:
- Journal Volume: 789; Journal ID: ISSN 0921-5093
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; cryogenic temperature; high energy x-ray diffraction; high-entropy alloy; nano-twins; stacking faults
Citation Formats
Fu, Wujing, Zheng, Wei, Huang, Yongjiang, Guo, Fangmin, Jiang, Songshan, Xue, Peng, Ren, Yang, Fan, Hongbo, Ning, Zhiliang, and Sun, Jianfei. Cryogenic mechanical behaviors of CrMnFeCoNi high-entropy alloy. United States: N. p., 2020.
Web. doi:10.1016/j.msea.2020.139579.
Fu, Wujing, Zheng, Wei, Huang, Yongjiang, Guo, Fangmin, Jiang, Songshan, Xue, Peng, Ren, Yang, Fan, Hongbo, Ning, Zhiliang, & Sun, Jianfei. Cryogenic mechanical behaviors of CrMnFeCoNi high-entropy alloy. United States. https://doi.org/10.1016/j.msea.2020.139579
Fu, Wujing, Zheng, Wei, Huang, Yongjiang, Guo, Fangmin, Jiang, Songshan, Xue, Peng, Ren, Yang, Fan, Hongbo, Ning, Zhiliang, and Sun, Jianfei. Fri .
"Cryogenic mechanical behaviors of CrMnFeCoNi high-entropy alloy". United States. https://doi.org/10.1016/j.msea.2020.139579. https://www.osti.gov/servlets/purl/1774493.
@article{osti_1774493,
title = {Cryogenic mechanical behaviors of CrMnFeCoNi high-entropy alloy},
author = {Fu, Wujing and Zheng, Wei and Huang, Yongjiang and Guo, Fangmin and Jiang, Songshan and Xue, Peng and Ren, Yang and Fan, Hongbo and Ning, Zhiliang and Sun, Jianfei},
abstractNote = {The CrMnFeCoNi high-entropy alloy (HEA) exhibits higher yield strength, ultimate strength and ductility at lower temperature. To further clarify the effect of the testing temperature on microstructure evolution, in this study in-situ synchrotron-based high-energy X-ray diffraction tensile tests were carried out from 298 K down to 123 K. The enhanced yield strength of the alloy at cryogenic temperatures can be attributed to the greater lattice distortion prior to plastic deformation. Higher strain hardening rate leads to the simultaneously enhanced strength and ductility of the studied HEA below room temperature. Both dynamic Hall-Petch hardening (twinning) and dislocation hardening provide high work hardening capacity for this alloy during the plastic deformation at cryogenic temperatures. The increased dislocation density and nano-twins at cryogenic temperatures can be attributed to the decrease in the stacking fault energy as the deformation temperature decreases. These studies could provide an in-depth understanding for the strengthening mechanisms of the HEA in different temperature conditions and guide the exploration of HEAs with superb mechanical properties at cryogenic environments.},
doi = {10.1016/j.msea.2020.139579},
journal = {Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing},
number = ,
volume = 789,
place = {United States},
year = {Fri May 29 00:00:00 EDT 2020},
month = {Fri May 29 00:00:00 EDT 2020}
}
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