Effect of deformation of austenite during HTMT on the stability of high-carbon martensite during low-temperature tempering
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Hot plastic deformation of austenite affects the kinetics of biphase decomposition of martensite during low-temperature tempering. The lattice constant of temper martensite depends on the extent of biphase decomposition of martensite.
As a rule, HTMT accelerates self-tempering during quenching and has different effects on biphase decomposition of martensite during subsequent low-temperature tempering, depending on the hot deformation conditions of austenite. When an imperfect polygonization structure with high density of free dislocations is formed during deformation of austenite, the biphase decomposition of martensite is accelerated during low-temperature tempering; after HTMT producing a perfected regular structure of polygonal subboundaries in austenite (and inherited by martensite), biphase decomposition of martensite is slowed down.
KeywordsAustenite Martensite Plastic Deformation Lattice Constant Deformation Condition
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