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Title: Deformation behavior of a Co-Cr-Fe-Ni-Mo medium-entropy alloy at extremely low temperatures

Abstract

In this work, we report the mechanical and microstructural characteristics of a medium-entropy alloy, Co17.5Cr12.5Fe55Ni10Mo5 (atomic percent, at%) at cryogenic temperatures, down to a record low temperature of 0.5 K. The alloy exhibits excellent strength and ductility combined with a high strain-hardening rate in the entire temperature range investigated. Its property profile, including the yield strength, ultimate tensile strength, strain hardening capability, and absorbed mechanical energy, is better than those of most alloys and HEAs used in cryogenics. Within the interval of extremely low temperatures considered (0.5–4.2 K), the alloy exhibits several unusual features, including anomalies of the temperature dependence of the yield strength and tensile ductility, discontinuous plastic deformation (DPF), and a change in the propensity for the deformation-induced martensitic transformation. While the occurrence of these effects in the same temperature interval may be fortuitous, we hypothesize that they are interrelated and provide a tentative explanation of the observed phenomena on this basis.

Authors:
 [1];  [2];  [2];  [2];  [3];  [4];  [4];  [5];  [5];  [1];  [6];  [1];  [1];  [1]
  1. Pohang Univ. of Science and Technology (POSTECH) (Korea, Republic of)
  2. National Academy of Sciences of Ukraine (NASU), Kharkov (Ukraine)
  3. Monash Univ., Melbourne, VIC (Australia); Univ. of Western Australia, Perth, WA (Australia)
  4. Univ. of Tennessee, Knoxville, TN (United States)
  5. Univ. of Illinois at Urbana-Champaign, IL (United States)
  6. Max Planck Inst. for Iron Research, Düsseldorf (Germany)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE; US Army Research Office (ARO); National Research Foundation of Korea (NRF); National Science Foundation (NSF)
OSTI Identifier:
1843667
Grant/Contract Number:  
AC05-00OR22725; W911NF-13-1-0438; W911NF-19-2-0049; NRF-2018K1A3A1A13087775; NRF-2016M3D1A1023384; NRF-2021R1A2C3006662; DMR-1611180; DMR-1809640
Resource Type:
Accepted Manuscript
Journal Name:
Materials Today
Additional Journal Information:
Journal Volume: 50; Journal Issue: 1; Journal ID: ISSN 1369-7021
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Medium-entropy alloy; Cryogenic temperatures; Discontinuous plastic deformation; Martensitic phase transformation; Dislocation

Citation Formats

Moon, Jongun, Tabachnikova, Elena, Shumilin, Sergii, Hryhorova, Tetiana, Estrin, Yuri, Brechtl, Jamieson, Liaw, Peter K., Wang, Wenqing, Dahmen, Karin A., Zargaran, Alireza, Bae, Jae Wung, Do, Hyeon-Seok, Lee, Byeong-Joo, and Kim, Hyoung Seop. Deformation behavior of a Co-Cr-Fe-Ni-Mo medium-entropy alloy at extremely low temperatures. United States: N. p., 2021. Web. doi:10.1016/j.mattod.2021.08.001.
Moon, Jongun, Tabachnikova, Elena, Shumilin, Sergii, Hryhorova, Tetiana, Estrin, Yuri, Brechtl, Jamieson, Liaw, Peter K., Wang, Wenqing, Dahmen, Karin A., Zargaran, Alireza, Bae, Jae Wung, Do, Hyeon-Seok, Lee, Byeong-Joo, & Kim, Hyoung Seop. Deformation behavior of a Co-Cr-Fe-Ni-Mo medium-entropy alloy at extremely low temperatures. United States. https://doi.org/10.1016/j.mattod.2021.08.001
Moon, Jongun, Tabachnikova, Elena, Shumilin, Sergii, Hryhorova, Tetiana, Estrin, Yuri, Brechtl, Jamieson, Liaw, Peter K., Wang, Wenqing, Dahmen, Karin A., Zargaran, Alireza, Bae, Jae Wung, Do, Hyeon-Seok, Lee, Byeong-Joo, and Kim, Hyoung Seop. Mon . "Deformation behavior of a Co-Cr-Fe-Ni-Mo medium-entropy alloy at extremely low temperatures". United States. https://doi.org/10.1016/j.mattod.2021.08.001. https://www.osti.gov/servlets/purl/1843667.
@article{osti_1843667,
title = {Deformation behavior of a Co-Cr-Fe-Ni-Mo medium-entropy alloy at extremely low temperatures},
author = {Moon, Jongun and Tabachnikova, Elena and Shumilin, Sergii and Hryhorova, Tetiana and Estrin, Yuri and Brechtl, Jamieson and Liaw, Peter K. and Wang, Wenqing and Dahmen, Karin A. and Zargaran, Alireza and Bae, Jae Wung and Do, Hyeon-Seok and Lee, Byeong-Joo and Kim, Hyoung Seop},
abstractNote = {In this work, we report the mechanical and microstructural characteristics of a medium-entropy alloy, Co17.5Cr12.5Fe55Ni10Mo5 (atomic percent, at%) at cryogenic temperatures, down to a record low temperature of 0.5 K. The alloy exhibits excellent strength and ductility combined with a high strain-hardening rate in the entire temperature range investigated. Its property profile, including the yield strength, ultimate tensile strength, strain hardening capability, and absorbed mechanical energy, is better than those of most alloys and HEAs used in cryogenics. Within the interval of extremely low temperatures considered (0.5–4.2 K), the alloy exhibits several unusual features, including anomalies of the temperature dependence of the yield strength and tensile ductility, discontinuous plastic deformation (DPF), and a change in the propensity for the deformation-induced martensitic transformation. While the occurrence of these effects in the same temperature interval may be fortuitous, we hypothesize that they are interrelated and provide a tentative explanation of the observed phenomena on this basis.},
doi = {10.1016/j.mattod.2021.08.001},
journal = {Materials Today},
number = 1,
volume = 50,
place = {United States},
year = {Mon Sep 13 00:00:00 EDT 2021},
month = {Mon Sep 13 00:00:00 EDT 2021}
}

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