Influence of dispersed β phase on local deformation pattern in mill-annealed Ti-Fe-O alloy under dwell fatigue loading
| Autor: | Liangwei Yin, Osamu Umezawa |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Dwell fatigue
Materials science Crystal plasticity Mechanical Engineering Alloy Titanium alloy Lath engineering.material Intergranular corrosion Nanoindentation Industrial and Manufacturing Engineering Stress (mechanics) Slip transfe Mechanics of Materials Modeling and Simulation engineering General Materials Science Redistribution (chemistry) Deformation (engineering) Composite material |
| Zdroj: | International Journal of Fatigue. 152:106447 |
| ISSN: | 0142-1123 |
| DOI: | 10.1016/j.ijfatigue.2021.106447 |
| Popis: | Grain-scale dwell fatigue behavior in Ti-Fe-O alloy is elucidated, with attention focused on the stress redistribution phenomenon that occurs within the soft-hard grain combination. Elastoplastic properties of the β phase are determined using nanoindentation and crystal plasticity modeling. On this basis, the role of intergranular β lath on stress redistribution is evaluated. Redistribution of stress from the soft to hard α grain is inhibited in the presence of intergranular β lath during dwell period. Meanwhile, the peak stress in the β lath is enhanced. This may result in the competition of two dwell fatigue failure modes at high stress state. |
| Databáze: | OpenAIRE |
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