Effect of strain wave shape on low-cycle fatigue crack propagation of SUS 304 stainless steel at elevated temperatures

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02654393· OSTI ID:6554230

Okazaki, M; Hattori, I; Koizwmi, T; Shiraiwa, F

Effect of strain wave shape on strain-controlled low-cycle fatigue crack propagation of SUS 304 stainless steel was investigated at 600 and 700/sup 0/C. It was found that the rate of crack propagation in a cycle-dependent region was successfully correlated with the range of cyclic J-integral, ..delta..J /SUB f/, regardless of the strain wave shape, frequency, and test temperature. It was also shown that the rate of crack propagation gradually increased from cycle-dependent curve to time-dependent one with decreasing frequency and slow-fast strain wave shape, and that one of the factors governing the rate of crack propagation in such a region was the ratio of the range of creep J-integral to that of total J-integral, ..delta..J /SUB c/ /..delta..J /SUB T/. Based on the results thus obtained, an interaction damage rule proposed semi-empirically was interpreted, with regard to crack propagation. Furthermore, fatigue crack initiation mechanism in slow-fast strain wave shape was studied, and it was shown that grain boundary sliding took an important role in it.

• Research Organization: Univ. of Nagaoka, Nagaoka
• OSTI ID: 6554230
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 14A:8; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRACK PROPAGATION
CREEP
CRYSTAL STRUCTURE
DAMAGE
DESTRUCTIVE TESTING
FATIGUE
FREQUENCY DEPENDENCE
GRAIN BOUNDARIES
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRAINS
TESTING
TIME DEPENDENCE
WAVE PROPAGATION