Abstract
Effects of grain size on Intergranular crack propagation properties under low-cycle fatigue were investigated using austenitic SUS304 stainless steel at 973K in air. Wave shapes used were strain-controlled slow-slow and slow-fast triangular ones. Small crack propagation rate (SCPR) and large crack propagation rate (LCPR) were examined. The SCPR was lower in the specimens with a smaller grain diameter, and increased in proportion to about D0.7 in the tests with slow-slow and slow-fast wave shapes. The LCPR increased with the grain size in proportion to about D0.5 in the tests with slow-fast wave shape. In this type of wave shape, the main crack coalesced with the wedge-type cracks which were initiated at the front of the main crack. The dependence of LCPR on grain size was much the same as that of crack initiation life, as analysed by the authors.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
