Effects of C and N on high-temperature deformation behavior of 15Cr-15Mn-4Ni austenitic stainless steels
SCIE
SCOPUS
- Title
- Effects of C and N on high-temperature deformation behavior of 15Cr-15Mn-4Ni austenitic stainless steels
- Authors
- Cho, Yeonggeun; Gwon, Hojun; Kim, Sung-Joon
- Date Issued
- 2021-07
- Publisher
- Elsevier BV
- Abstract
- The effect of interstitial C and N atoms on high-temperature deformation behavior was investigated in 15Cr & ndash;15Mn & ndash;4Ni austenitic stainless steels containing 0.1 & ndash;0.3 wt% of either C or N. Single-hit compression tests were performed in the deformation temperature range 800 & ndash;1100 degrees C and the strain rate range 0.01 & ndash;1 s- 1. In both C-added (+C) and N-added (+N) steels, the high-temperature strength, i.e. mean flow stress, increased as the concentration of C or N increased. At the same level of C or N concentration, the mean flow stress, activation energy for high-temperature deformation, and degree of lattice expansion were larger in +N-steels than in +Csteels, whereas the dynamically recrystallized grain size and grain growth rate were larger and faster in +C-steels than in +N-steels. The higher strength of +N-steels over +C-steels at a wide range of temperatures was attributed to the stronger solid solution hardening effect of N atoms compared to C atoms. Dynamic recrystallization was relatively retarded in the +N-steels, because N atoms interacted strongly with grain boundaries.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/109542
- DOI
- 10.1016/j.msea.2021.141463
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- Materials Science and Engineering: A, vol. 819, 2021-07
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- There are no files associated with this item.
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