Abstract

Reversible martensitic transformation was observed in Fe-based high-carbon alloys at temperatures when none lattice defects (including divacancies) could diffuse. Formation and behavior of carbon-vacancy clusters was studied and discussed. Chemical composition of hexagonal ɛ-carbide is determined as Fe 3C. The effect of particle size and ɛ-carbide/martensite orientation relationship on the ɛ-carbide → cementite transformation is discussed.

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