Influence of Low Martensite Volume Fraction on Damage Evolution in Steel with Ferrite-Cementite Microstructure

This study investigates the influence of a low martensite volume fraction on the mechanical behavior and damage evolution of steels with a ferrite-cementite microstructure. Tensile testing and SEM analysis show that martensite, even at low levels, alters strain partitioning, suppresses yield point elongation, and shifts fracture initiation from ferrite cementite debonding to void formation near martensite particles. These findings highlight an unaddressed research gap regarding the role of minimal martensite fractions in modifying failure mechanisms.

کلیدواژه ها:

damage evolution ، ferrite-cementite steel ، martensite ، tensile behavior