High Temperature Mechanical Properties of HK40-type Heat-resistant Cast Austenitic Stainless Steels
- Authors
- Kim, Yoon-Jun; Lee, Dong-Geun; Jeong, Hyeon Kyeong; Lee, Yong-Tai; Jang, Ho
- Issue Date
- 7월-2010
- Publisher
- SPRINGER
- Keywords
- heat resistant steels; intermetallic phase; low-cycle fatigue; stainless steels; tensile strength
- Citation
- JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, v.19, no.5, pp.700 - 704
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
- Volume
- 19
- Number
- 5
- Start Page
- 700
- End Page
- 704
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/116139
- DOI
- 10.1007/s11665-009-9550-3
- ISSN
- 1059-9495
- Abstract
- This work characterized HK40-type, cast austenitic stainless steel, as the W content was varied from 0 to 3.6 wt.%. Analysis of microstructure using optical and scanning electron microscopies showed that the alloys contained relatively large amount of Cr-carbide, Nb-compound, and MnS at the austenite grain boundary. The addition of W promoted the formation of Cr-carbide and affected the high-temperature mechanical properties. According to tension tests carried out at room temperature, 400, 600, and 800 degrees C, the alloys became significantly stronger and brittle as W content increased. The low-cycle fatigue tests showed that fatigue resistance was also increased with W addition, but an excessive amount of W decreased the fatigue resistance. The HK40-type alloys with 2.0 wt.% W exhibited best high-temperature mechanical performances.
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