Dependence of mode I and mixed mode I/III fracture toughness on temperature for a ferritic/martensitic stainless steel
- Pacific Northwest Lab., Richland, WA (United States); and others
The objective is to investigate the dependence of mode I and mixed mode I/III fracture toughness on temperature in the range of {minus}95{degrees}C to 25{degrees}C for a low activation ferritic/martensitic stainless steel (F82-H). Mode I and mixed Mode I/III fracture toughnesses were investigated in the range of {minus}95 to 25{degree}C for a F82-H steel heat-treated in the following way; 1000{degree}C/20 h/air-cooled (AC), 1100{degree}C/7 min/AC, and 700{degree}C/2 h/AC. The results indicate that crack tip plasticity was increased by mixed mode loading, and suggest that at low temperature, mode I fracture toughness is the critical design parameter, but at temperatures above room temperature, expecially concerning fatigure and creep-fatigue crack growth rate, a mixed mode loading may be more harmful than a mode I loading for this steel because a mixed mode loading results in lower fracture toughness and higher crack tip plasticity (or dislocation activity).
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 114929
- Report Number(s):
- DOE/ER-0313/17; ON: DE95013663; TRN: 95:022886
- Resource Relation:
- Other Information: PBD: Apr 1995; Related Information: Is Part Of Fusion materials semiannual progress report for the period ending September 30, 1994; PB: 390 p.
- Country of Publication:
- United States
- Language:
- English
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