In situ synchrotron study on the interplay between martensite formation, texture evolution and load partitioning in low-alloyed TRIP steels

► In situ probing the micromechanical response of TRIP steels using high-energy X-rays. ► Link between metastable austenite evolution in bulk and material mechanical response. ► Higher aluminium content yields larger austenite transformation range and formability. ► The austenite stability depends strongly on grain orientation. ► Load partitioning between constituent phases is affected by the transformation.