|About this Abstract
||Materials Science & Technology 2019
||Advances in Understanding of Martensite in Steels
||Use of In-situ Methods to Investigate the Deformation Induced Martensitic Transformation
||Djamel Kaoumi, Francois-Ligori Paul, Yuchen Zhao, Matthew Frost, Jun-Sang Park, Jonathan Almer
|On-Site Speaker (Planned)
Deformation Induced Martensitic (DIM) transformation in various 304 Stainless Steels is characterized in-situ through imaging and diffraction methods. (i) In-situ TEM tensile experiments done at 25°C down to cryogenic temperatures (-100°C) evidenced processes of Stacking Fault (SF) formation and the transformations from austenite γ (fcc) to both ε-martensite (hcp) and/or α’-martensite (bct). (ii) The DIM transformation was also investigated in-situ through uniaxial tensile tests performed at 25°C under synchrotron X-ray diffraction and neutron diffraction measurements respectively where the estimated phase volume fraction and the internal stress analysis based on the diffraction data evidenced a possible mechanism of direct transformation to α’-martensite by crystal lattice deformation. This presentation will thus showcase how in-situ techniques are suitable to investigate phase transformation mechanisms induced under stress.
||Definite: At-meeting proceedings