Abstract
Deformation-induced carbide transformation (DICT) is first observed in M2 high-speed steel (HSS) wherein deformation enables a lower transformation temperature and enhanced transformation rate of M2C carbide into M6C and MC. Dislocations introduced into M2C by pre-deformation act as nucleation sites of new precipitates and enable an evolution of the transformation pathway from a common interface-nucleation mode to a dislocation-nucleation manner. DICT offers an opportunity to circumvent the carbide-related trade-off between the wear resistance and toughness of M2 HSS.
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