Controlled rolling of Hastelloy-N

Abstract

This paper provides information of the uniform grain structure after application of hot and cold rolling conditions and recrystallization processes followed by various annealing times in NiMoCr alloy. The different structure would result in high temperature mechanical properties such as yield strength, tensile strength, ductility, fatigue, and creep strength. The microstructural changes as results from all tested programs were investigated by optical microscope. The obtained results showed that the uniformity of recrystallized structure relates strongly to amount of deformation during hot and cold rolling and period of annealing time. It was also found that the uniformity of recrystallized structure increased with higher deformation and longer annealing times. The formability was tested and the base deformation resistances (BDR) were also calculated.