Thermal Fatigue Studies Using HF Induction Heating of Die Materials for Light Metals Casting
In this study a new thermal fatigue test rig has been developed that can apply a net energy input to materials with different physical properties using HF induction heating. Several commercially available hot work ferrous and non-ferrous die materials were evaluated with the aim of providing a basis for selecting an appropriate die material with good thermal fatigue resistance for a given HPDC application. The results show materials with high thermal conductivity such as tungsten-based materials are more resistant to thermal fatigue cracking than conventionally used hot work tool steels for HPDC dies. The initiation and growth of thermal fatigue cracks were examined and periodically evaluated using computer image analysis, for crack morphology, and hardness on each material tested.
M.S. Dargusch & S.M. Keay
S. Gulizia et al., "Thermal Fatigue Studies Using HF Induction Heating of Die Materials for Light Metals Casting", Materials Science Forum, Vols. 618-619, pp. 357-360, 2009