About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Multimodal Assessment of Mechanically Induced Transformation and Damage in TRIP Steels Using X-Ray Nanotomography and Pencil-Beam Diffraction Tomography |
Author(s) |
Hiroyuki Toda, Kyosuke Hirayama, Hiro Fujihara |
On-Site Speaker (Planned) |
Hiroyuki Toda |
Abstract Scope |
A comprehensive multimodal measurement environment integrating X-ray nano- and micro-tomography techniques and a special X-ray diffraction technique has been developed and was applied for the first time to practical metallic materials. The X-ray diffraction method used is a special one in which a collimated X-ray beam of 1 micron in diameter is scanned as the sample is rotated, hitting all microscopic regions of the sample from all directions. The three techniques were installed on a single synchrotron beamline (BL20XU at SPring-8) and the deformation, phase transformation, damage and fracture processes of a single TRIP steel specimen were visualised and analysed. The transformation behaviour of a large number of austenite grains was analysed individually to identify the factors controlling the behaviour. It was found that the phase transformation rate is influenced by the crystallographic orientation and dislocation density of individual austenite grains, and that this also affects subsequent damage behavior. |
Proceedings Inclusion? |
Undecided |