Stress corrosion cracking and corrosion fatigue on 316L stainless steel in boric acid concentrated media at 320 C

Conference · Thu Jul 01 00:00:00 EDT 1999

OSTI ID:20002560

Herms, E; Olive, J M; Puiggali, M; Boursier, J M

Stress Corrosion Cracking (SCC) and Corrosion-Fatigue (CF) tests were performed in autoclave at 320 C in concentrated boric acid chlorinated media in presence of oxygen or hydrogen on type 316L austenitic stainless steel. Crack Growth Rates (CGR) are higher in non deaerated solutions for both SCC and CF than in hydrogenated solutions. CGR are relatively similar in CF and in SCC, excepted for high load ratio in CF where CGR are higher than in SCC. Detailed analysis of the fracture surface shows some distinct features between SCC and CF. Intergranular and transgranular mode of fracture are observed on SCC and CF. Fracture modes depend on the chemistry of solution in SCC and on frequency in CF. Traces of slip bands and crack front marking associated with oxide scale present on fracture surfaces exist in SCC and CF. Fatigue striations appear for low load ratio and high frequency. Secondary intergranular and transgranular cracking is observed only on SCC fracture surfaces and ligament morphology can be different in SCC relative to FC.

• Research Organization: Bordeaux Univ., Talence (FR)
• OSTI ID: 20002560
• Report Number(s): CONF-990401--
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
BORIC ACID
CORROSION FATIGUE
CRACK PROPAGATION
PWR TYPE REACTORS
REACTOR MATERIALS
STAINLESS STEEL-316L
STRESS CORROSION