Response surface modelling of thermo-mechanical fatigue in hot forging

G. A. Berti, S. Bonnini, M. Monti & L. Salmaso
Investigation of thermo-mechanical fatigue (TMF) phenomena usually involves complex experimentation and long testing runs, as well as difficulties in specifying and fitting appropriate models. Moreover, the experimental techniques usually consider temperature in the specimen to be constant, or slowly varying, often with a uniform distribution of temperature in the cross section of the specimen but it is not a plausible assumption. Aimed at extending the investigation to hot forging dies, where the variation of some...