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Effect of Nb addition on Z-phase formation and creep strength in high-Cr martensitic heat-resistant steels
- Lee, Kyu-Ho;
- Hong, Sung-Min;
- Shim, Jae-Hyeok;
- Suh, Jin-Yoo;
- Huh, Joo-Youl;
- 외 1명
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29초록
The effect of Nb addition on the creep strength of high-Cr martensitic heat-resistant steel was investigated at temperatures ranging from 839 to 894K. The short-term creep properties were improved by Nb addition due to the enhanced MX precipitation. However, Nb addition deteriorated the steel's long-term stability resulting in an even shorter creep-rupture life than the original alloy. Onset of the accelerated degradation in Nb-containing steel was attributed to the gradual formation of Z-phase at the expense of M2N precipitates during creep exposure. (C) 2015 Elsevier Inc. All rights reserved.
키워드
Heat-resistant steels; Creep strength; Precipitation; Z-phase; XRD; MICROSTRUCTURAL EVOLUTION; DEFORMATION; TEMPERATURE
- 제목
- Effect of Nb addition on Z-phase formation and creep strength in high-Cr martensitic heat-resistant steels
- 저자
- Lee, Kyu-Ho; Hong, Sung-Min; Shim, Jae-Hyeok; Suh, Jin-Yoo; Huh, Joo-Youl; Jung, Woo-Sang
- 발행일
- 2015-04
- 유형
- Article
- 권
- 102
- 페이지
- 79 ~ 84
- 언어
- ENG
- 출판사
- ELSEVIER SCIENCE INC
- 발행국가
- 미국
- 분량
- 6 페이지
- ISSN
- E 1873-4189
P 1044-5803