The reverse transformation of martensite to austenite takes place when the alloys are annealed after the external stress is unloaded.
卸去外加应力，对其进行回复退火，合金发生逆转变，即从马氏体转变为奥氏体。
2
The decomposition and transformation of the retained austenite in bainite differ from that in martensite.
贝氏体中的残余奥氏体分解和转变的行为与马氏体中的不同。
3
M1 and M2 are two different martensite variants with diverse elastic strain energy and lattice distortions, which transformation to austenite at different temperatures.