About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
|
Symposium
|
5th International Congress on 3D Materials Science (3DMS 2021)
|
Presentation Title |
3D Mapping of Type-III Stress in Plastically Deformed Steel |
Author(s) |
Yujiro Hayashi |
On-Site Speaker (Planned) |
Yujiro Hayashi |
Abstract Scope |
Materials modeling for the prediction of mechanical behavior of alloys requires advances in multiscale 3D measurement of stress and its evolution produced by mechanical events. We show non-destructive 3D mapping of intragranular local (type-III) stress in plastically deformed multiple grains embedded in mm-sized bulk steel using scanning 3DXRD. The grains were illuminated by a high-energy X-ray microbeam from various directions. Non-overlapped multiple diffraction spots per grain were detected through a conical slit. Type-III elastic strain tensors under 5% plastic deformation were determined from the differences between observed scattering angles and stress-free Bragg angles. The observed type-III stress deviated by a value as high as the yield strength from grain-averaged (type-II) stress. The type-III stress was in a triaxial stress state even under elongation smaller than the uniform elongation. Multiscale modeling of deformation and failure of steel will be facilitated using the non-destructive 3D type-III stress tensor mapping data. |
Proceedings Inclusion? |
Definite: Other |