Effect of internal hydrogen on the mixed-mode I/III fracture toughness of a ferrific/martensitic stainless steel

Conference · Thu Sep 01 00:00:00 EDT 1994

OSTI ID:10116237

Li, H. ^[1]; Jones, R. H. ^[2]; Gelles, D. S. ^[2]; Hirth, J. P. ^[3]

---

1. Associated Western Universities, Richland, WA (United States)
2. Pacific Northwest Lab., Richland, WA (United States)
3. Washington State Univ., Pullman, WA (United States)

The effects of H on the mixed-mode I/III critical J-integrals (J{sub TC}) and tearing moduli (dJ/da) were examined for a martensitic stainless steel at ambient temperature. A H content of 4 ppm(wt) was attained after charging in a H{sub 2} gas chamber (138 MPa) at 300{degrees}C for 2 weeks. Results showed that H decreased J{sub TC} and dJ/da values compared to steel tested without H. However, the presence of H did not change the dependence of J{sub TC} and dJ/da values on the crack angles. Both J{sub IC} and dJ{sub 1}/da exhibited the highest relative values. The minimum values of both J{sub TC} and dJ/da occurred at a crack angle between 35 and 55{degrees} [P{sub iii} /(P{sub iii} + P{sub i}) = 0.4 and 0.6]. A mechanism of the combined effect of H and mixed-mode on J{sub TC} and dJ/da is discussed.

• Research Organization: Pacific Northwest Lab., Richland, WA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 10116237
• Report Number(s): PNL-SA-24007; CONF-940945-6; ON: DE95005722; TRN: 95:001743
• Resource Relation: Conference: 5. international conference on hydrogen effects on material behavior, Moran, WY (United States), 11-15 Sep 1994
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
MARTENSITE
FRACTURE MECHANICS
HYDROGEN EMBRITTLEMENT
FERRITE
STAINLESS STEELS
MICROSTRUCTURE
HYDROGEN
METALLURGICAL EFFECTS
FRACTURE PROPERTIES
HEAT TREATMENTS
ELECTRIC DISCHARGES
360103
400201
MECHANICAL PROPERTIES
CHEMICAL AND PHYSICOCHEMICAL PROPERTIES