Transient-temperature and residual-stress fields in axisymmetric metal components after hardening

Abstract

A finite-element method is used to analyse the transient–temperature and residual-stress fields in an axisymmetric metal specimen during quenching. In the calculation of transient-temperature fields it is assumed that an unsteady source of latent heat exists in the specimen when a phase transformation occurs. Factors such as the surface heat transfer coefficient, heat conductivity coefficient, linear expansion coefficient, density, specific heat capacity, latent heat, and so forth are all temperature dependent. The elastic-plastic properties of the specimen are modified according to temperature fields, which are determined; the influence of plastic deformation on the temperature fields is neglected. The agreement between the calculated results and the experimental data shows that the numerical analysis method is reliable. The method may also be applied to the analysis of specimens with other than axisymmetric shape.

MST/15