Multiscale in-situ observations of the micro- and nanostructure of a PH 13-8 Mo maraging steel during austenitization

Research on the Cold Rolling Process, Microstructure and Properties of 305 Austenitic Stainless Steel Thin Strips

“…It is generally accepted that the main purpose of reverse phase transformation annealing is to reduce deformation-induced martensite to austenite under specific conditions and that reverse transformation, revertive recrystallization or discontinuous recrystallization of deformation-induced martensite may occur simultaneously or sequentially [ 26 ]. In dynamics, on the one hand, the more deformation-induced martensite is generated, the more prone to reverse transformation in the early stage of annealing, because the more severe deformation-induced martensite will provide more nucleation sites for the austenite grains, therefore, the larger the deformation, the faster the martensite disappears [ 27 ]. For example, the volume fractions of martensite before and after annealing of the 90% cold rolled sample changes greatly, because the 90% cold rolled sample has more dislocation cellular martensite, which creates favorable conditions for the formation of nano/ultrafine grain structure in the later stage.…”