The comparison of deformation structure between as-quenched and tempered lath martensites in a low carbon steel

摘要

The microstructure of lath martensite in the low carbon steels contains fine laths with many dislocations. After light deformation, the lath boundaries remain, and the deformation structure contains lamellar boundaries, irregularly bent laths and kinked laths. After heavy deformation, the lamellar boundaries increase. Tempering changes lath martensite structure, and the deformation structure maybe changes by tempering. However, the deformation structure of tempered lath martensite is not understood well. The aim of the present study is to clarify the development of deformation structure of tempered lath martensite in the low carbon steel.