Effect of microsctucture on mechanical properties of Co-Cr-W-Ni superalloy

Abstract

Cobalt based Superalloy containing Tungsten, Nickel and Chromium as alloying elements, is extensively used in fabrication of high temperature components of launch vehicle systems. Microstructural variation with respect to grain size has an important role to play in mechanical properties of this alloy. Microstructural changes were incorporated by varying the heat treatment temperature and effect of such changes on the mechanical properties at room temperature as well as at high temperature is investigated. Increase in grain size and decrease in strength and ductility is observed for the alloy heat treated at relatively higher temperature.