Amount of retained austenite at room temperature after reverse transformation of martensite to austenite in an Fe-13 percent Cr-7 percent Ni-3 percent Si martensitic stainless steel

摘要

Below a heating rate of 10 deg C/s, the reverse transformation (#alpha#'->#gamma#) of a low carbon Fe-13 percent Cr-7 percent Ni-3 percent Si martensitic stainless steel occurs by diffusion, whereas it occurs in a diffusionless manner above 10 deg C/s. The amount of retained austenite at room temperature is proportional to both the volume fraction of reversed austenite and its stability.