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Abstract The study provides new sights on thermal and mechanical stability of reverted austenite, which interestingly were modulated by intercritical heat treatment in a low alloy low carbon steel. Thermal… Click to show full abstract
Abstract The study provides new sights on thermal and mechanical stability of reverted austenite, which interestingly were modulated by intercritical heat treatment in a low alloy low carbon steel. Thermal and mechanical stability of reverted austenite was strongly governed by the intercritical tempering temperature during the second step of heat treatment and decreased with the increase of temperature. Hollomon analysis indicated that reverted austenite grains experienced martensitic transformation and the tensile strength was significantly enhanced. Furthermore, thermal stability studied by low temperature magnetic experiments suggested that Ms and Mf of reverted austenite generated by intercritical tempering at 720℃ were -97.5℃ and -120.5℃ respectively, and the transformation product was twinned martensite.
Journal Title: Materials Letters
Year Published: 2021
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