Interaction of Recrystallization and Precipitation during Hot Forming of Alloy 80A
In the high temperature deformation window of the nickel base Alloy 80A the lower temperature region during open die forging was examined with regard to the materials formability. For that purpose, hot compression samples were investigated by means of EBSD and TEM in order to look at recrystallization, precipitations and ductile damage as well as their reciprocal effects. Further a microstructure model was used, which calculates the materials strengthening, softening and the particle kinetics. A micro mechanical damage model of the effective stresses was coupled with the grain structure development in order to describe a retarded damage rate due to the ongoing recrystallization.
T. Chandra, K. Tsuzaki, M. Militzer , C. Ravindran
C. Sommitsch et al., "Interaction of Recrystallization and Precipitation during Hot Forming of Alloy 80A", Materials Science Forum, Vols. 539-543, pp. 2988-2993, 2007