|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Ultrafine-grained and Heterostructured Materials (UFGH XII)
||In-situ X-ray Diffraction Study on Tensile Deformation of TRIP-assisted Metastable Austenitic Fe-Ni-C Steel
||Sungsoon Kang, Si Gao, Wenqi Mao, Yu Bai, Myeongheom Park, Hiroki Adachi, Masugu Sato, Nobuhiro Tsuji
|On-Site Speaker (Planned)
Tensile test with in-situ high energy synchrotron X-ray diffraction at the beam line BL46XU of SPring-8 was carried out on a TRIP-assisted metastable austenitic Fe-Ni-C specimen having an excellent combination of a high ultimate tensile strength and a good tensile elongation . The change in the volume fraction of deformation induced martensite during tensile deformation of the sample was precisely measured using the diffraction profiles. Besides that, analysis of phase stresses in austenite and martensite was performed measured by the diffraction peak shift due to the elastic deformation of the phases in response to the external load. The results showed a moderate transformation rate of the strain induced martensite, and a dramatic phase stress partitioning between the deformation induced martensite and the austenite during plastic deformation.