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Hydrogen-induced nanohardness variations in a CoCrFeMnNi high-entropy alloy
- Zhao, Yakai;
- Lee, Dong-Hyun;
- Lee, Jung-A;
- Kim, Woo-Jin;
- Han, Heung Nam;
- ... Jang, Jae-il;
- 외 2명
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57초록
The influence of electrochemically charged hydrogen (H) on the hardness (H-N) of a CoCrFeMnNi high-entropy alloy (HEA) was investigated with nanoindentation. Upon charging, H-N of HEA increases by similar to 60%, which decreases gradually during subsequent aging at room temperature, and on prolonged aging, the alloy softens to an extent that H-N falls below that of the uncharged HEA. These H-induced mechanical property variations are rationalized in terms of the competition between solid solution hardening caused by H and excess vacancy creation due to deeply trapped H. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
키워드
High-entropy alloy; Hydrogen; Nanoindentation; Thermal desorption spectroscopy; MECHANICAL-PROPERTIES; STORAGE PROPERTIES; DISLOCATION NUCLEATION; NANOCRYSTALLINE; BEHAVIOR; NI; MICROSTRUCTURE; SUSCEPTIBILITY; DEFORMATION; STABILITY
- 제목
- Hydrogen-induced nanohardness variations in a CoCrFeMnNi high-entropy alloy
- 저자
- Zhao, Yakai; Lee, Dong-Hyun; Lee, Jung-A; Kim, Woo-Jin; Han, Heung Nam; Ramamurty, Upadrasta; Suh, Jin-Yoo; Jang, Jae-il
- 발행일
- 2017-04
- 유형
- Article
- 권
- 42
- 호
- 16
- 페이지
- 12015 ~ 12021