Quantitatively evaluating respective contribution of austenite and deformation-induced martensite to flow stress, plastic strain, and strain hardening rate in tensile deformed TRIP steel

In situ 3D crystallographic characterization of deformation-induced martensitic transformation in a metastable Fe–Cr–Ni austenitic alloy by X-ray microtomography

“…To be able to associate the DIMT process with the resultant mechanical responses, we need to obtain three-dimensional (3D) information on the nature and growth characteristics of the newly formed α ʹ martensite, including its structure and shape, as well as its crystallographic orientation in relation to the parent austenite. X-ray 16 , 17 and neutron diffraction 18 – 20 analyses can be used effectively to acquire hitherto controversial crystallographic information, as well as information on the internal stresses and microscopic strains applied to various diffractive planes during tensile deformation, and hence the dislocation density. Diffraction observations can precisely capture the steep changes in the volume fraction of the α ʹ martensite and parent austenite phases as DIMT progresses.…”