Abstract
Thermomechanical fatigue behavior of a nickel base single crystal superalloy TMS-82 has been investigated. It was found that the micropores in the alloy tend to initiate large amounts of deformation twins and the crack causes many twins to occur during its propagation. It is postulated that these twins around the micropores or the crack are induced by the stress field of the micropores or the crack tip, respectively. A thermodynamic model is adopted linking the twin formation energy with the stress field around the crack tip, which explains the observed results with good consistency. The influencing factors for a crack to stimulate twins around it are shown by the model, which might provide possible ways to enhance the alloy's thermomechanical fatigue performance.
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: Progress in Natural Science: Materials International
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.
