About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
|
Presentation Title |
On the Relevant Scale Related to Fatigue Crack Initiation in Different Metallic Alloys |
Author(s) |
Patrick Villechaise, Jonathan Cormier, Samuel Hemery |
On-Site Speaker (Planned) |
Patrick Villechaise |
Abstract Scope |
A way to improve metallic alloys against fatigue crack initiation is to apply thermo mechanical treatments in order to achieve a well-adapted metallurgical microstructure. To propose relevant metallurgical solutions, one needs first to identify the mechanisms governing the early stages of fatigue damage in relation with the microplasticity and the microstructure. The plastic localization within slip bands and the interactions with microstructural elements like grain/twin boundaries or other interfaces are often at the root of crack initiation. Lots of studies aim to identify the very local microstructure at the origin of cracks using the most advanced techniques for analyzing the role of crystallography, chemistry and 3D morphology. However the finest scale is not always the only one that has to be considered. This question will be discussed based on results obtained on different FCC (steels, Ni-based superalloys) and HCP (/ and -metastable Ti alloys) alloys. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Characterization, Other |