Abstract
The fatigue and creep-fatigue crack initiation and growth behaviors of Ni-base single crystal superalloy TMS 12 were investigated at room temperature and 920°C using double edge notched specimens. At room temperature the fatigue incipient crack growth from the notch occurred by failure on the (111) plane, and the crack growth was not dependent on the number of cycles. At 920°C the crack growth behavior did not exhibit anisotropic fracture, which is caused from multiple slips. Under creep-fatigue and creep, rhombic cavities were observed at the crack tip vicinity. Alpha wolfram precipitates were observed at the sites of cavities. Cracks initiated from the interface rafted γ' and γ at alpha wolfram precipitates in (100) plane, which formed square-type cavities.
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: Journal of the Society of Materials Science, Japan
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.
