|
金属学报(英文版) 1989
GROWTH OF ISOTHERMAL MARTENSITE IN AN Fe-Ni-Mn ALLOYKeywords: Fe-Ni-Mn alloy,plate martensite,isothermal transformation Abstract: The substructural development of martensite plates at different stage of the transformation foran Fe-21Ni-4Mn alloy has been investigated by using transmission electron microscope.Twinning was found in small thin platelets at the initial stage.Fine twins extend to the wholeplatelet.The dislocations and twins were found in the thick platelets at a later stage.Bendingof the twins was also observed frequently at this stage.Finally,several platelets coalesce witheach other to form a macroscopic(252)_f martensite“plate”.The original habit plane of theindividual platelet was measured to be close to(121)_f.
|