The objective of this paper is to extend the capability of analyzing the time
dependence and coupling of temperature, stress and strain effects on the macroscopic and
microscopic structures subjected to quenching, and to introduce a theory of the kinetic of the
phase transformation. Strain due to phase transformation, transformation plasticity and thermal
expansion are the dominant factors that need to be included in the simulation of a quenching
process. The evolution of the microstructure also influences the constitutive equations. In
particular, as the temperature changes from the high to phase transformation, temperature and
then room temperature, the stress-strain relationship changes from elastic-plastic strain. Therefore,
in order to obtain a high strength and ductility in carbon steels, transformation plasticity often has
a major effect in increasing of the residual stress during quenching process. In this paper, we
measured temperature change and distortion occurring during the quenching process of a carbon
steel(SCr420) by thermal simulation machine (Gleeble 1500) are used to determine the parameter of
transformation plasticity due to the generation of martensite. The modeling of martensitic
transformation plasticity is also verified by using of computational simulation of the quenching
process.
Metallo-Thermo-Mechanical Simulation of Laser-Quenching Process of Carbon Steel by Pulsed YAG Laser Beam.
