Abstract
Integrated Computational Materials Engineering (ICME) is a way to design products and its materials along with their manufacturing process by linking material models at multiple lengths and time scales. The phenomenological model gives constitutive equations such that it defines the relationship between process variables and the resulting output i.e. microstructure and its properties. Forged components require high strength and good ductility. So as to achieve best combination of these properties, an appropriate grain size must be produced which actually depends on thermo-mechanical process used. In this paper a thermo mechanical simulation experiments were conducted for 42CrMo4 material at 1223K, 1323K and 1423K with corresponding strain rates of 0.2, 2, 20 (s-1). Based on the flow stress data, activation energy Q = 421.6 kJ/mole was calculated and further a mathematical relation was developed between grain size evolved and process parameters such as strain, strain rate and temperature during hot forging. The thermo mechanical physical simulation process was optimized by applying ICME principle by studying the entire deformation behaviour of material and the various metallurgical variables affecting the features of microstructure during deformation process