Metallo-Thermo-Mechanical Simulation of Jominy Test Procedure Introducing Developed Material Database "MATEQ"

Abstract

Jominy bar test is popularly used to evaluate hardenability of steels. Thermal and phase transformation stresses and strains are induced in the specimen quenched from an end, the effect of which is not taken into consideration in usual cases. Simulation based on metallo-thermo-mechanics is carried out by use of developed code "HEARTS" to estimate the induced martensite distribution as well as temperature and stresses during and after the test, so to identify the Jominy distance. Here, the material parameters necessary for the simulation are employed from the material database "MATEQ" developed by the Subcommittee on Material Database, the Society of Materials Science, Japan (JSMS). The results of simulation on the Jominy distance depending on chemical compositions and other material characteristics are discussed compared with experimental data for several steels, and the effect of the stresses are evaluated. Thus determined data of Jominy distane are also compared with the ideal critical diameter being another effective parameter to evaluate hardenability of steels.