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- Title
Fatigue Crack Growth Behavior of Nitrogen-Alloyed Low-Carbon Austenitic Stainless Steel at Room Temperature.
- Authors
Duraipandi, R.; Nani Babu, M.; Moitra, A.
- Abstract
Fatigue crack growth (FCG) behavior of SS 316L with different nitrogen contents (0.078 wt.% to 0.22 wt.%) was studied at room temperature under different load ratios (R) 0.1 to 0.7. The variation of crack growth rate (da/dN) was analyzed in terms of crack growth mechanism operating under both regimes. With variation of nitrogen content, variation of ΔKth was observed; 0.12 (12 N) and 0.14 (14 N) variants showing minimum and maximum ΔKth, respectively. This was correlated with changes in stacking fault energy (SFE) of the material with nitrogen content. The influence of other factors such as tensile strength, modulus, and microstructure, along with substructural changes during crack growth, were studied. In the 14 N nitrogen variant, the propensity for planar slip and better slip reversibility, originating from a relatively lower SFE, were attributed to a higher ΔKth.
- Subjects
FATIGUE crack growth; FRACTURE mechanics; AUSTENITIC stainless steel; STAINLESS steel; TENSILE strength
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2023, Vol 75, Issue 2, p478
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05622-4