About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
Presentation Title |
Ultrasonic Effects on Plastic Deformation Behavior of TRIP 780 Steel |
Author(s) |
Jiarui Kang, Xun Liu |
On-Site Speaker (Planned) |
Jiarui Kang |
Abstract Scope |
Plastic behavior of TRIP 780 steel under the influence of ultrasonic vibration is studied with micro-tensile tests. The gauge length of the specimen is designed at one order of magnitude smaller than the wavelength of ultrasonic vibration. With this configuration, reduction of flow stress is observed as ultrasonic vibration is applied. The softening effect is more significant with increasing ultrasonic amplitude. When ultrasonic vibration stops, residual hardening is observed, i.e., flow stress rises to a level that is higher than the original stress strain curve. Electron backscatter diffraction (EBSD) was used to characterize the microstructural evolution and the result shows superimposed ultrasonic vibration promotes preferential grain re-orientation and modifies geometrically necessary dislocation (GND) density. |
Proceedings Inclusion? |
Planned: |