Competition of mechanisms contributing to the texture formation in metastable austenitic steel under compressive load

Abstract The interplay of microstructural mechanisms controlling the deformation-induced martensitic phase transformations and texture formation in all phases a metastable austenitic Cr-Mn-Ni steel was investigated using situ synchrotron radiation diffraction under uniaxial compression ex electron backscatter diffraction. With increasing deformation, originally fully transformed to mixture γ-austenite, e-martensite α´-martensite. face centred cubic γ-austenite formed fibre {110} with respect deformation direction. degree increased progressively deformation. hexagonal close packed preferentially oriented reciprocal direction { 10 1 ¯ 3 } along load axis. nearly independent extent. body α´-martensite mixed {100} & {111} component very strong early stages formation, but it deteriorated evolution is explained by competition between transformation texture, several mechanisms, which are highly sensitive local orientation grains acting force, like stacking fault austenite, variant selection both martensites twinning