Residual Stress and Texture Evolution on Surface of 304L TRIP Steel Sheet Subjected to FLC Test

The martensite formation in the outer and inner blank sheet surfaces of the metastable 304L austenitic stainless steel subjected to the Forming Limit Curve (FLC) testing, performed according to the Marciniak method, was analysed in regions located near and away from the failure site. X-ray Diffraction (XRD) was also used for residual stress and texture quantification related to strain-induced martensitic phase transformation resulting from distinct stress and strain trajectories associated to FLC specimens. From the results were observed some aspects as greater diversity in the martensite formation and austenite hardening at outer sheet surface that are correlated to residual stress and austenite textural evolution.