The effect of nitriding on the elevated temperature tensile properties of some molybdenum-base alloys

Abstract

The elevated temperature tensile properties of Mo-0.49% Ti, Mo-0.98% Ti and Mo-1.5% Zr specimens, in both the dispersion-hardened and the recrystallised conditions, have been investigated between room temperature and 900°C using two strain-rates. The effect of increase in temperature and in strain-rate on ultimate tensile stress (U.T.S.) and ductility have been studied and metallographic and fractographic observations have been made on the tested specimens. The results are discussed in the light of current theories of elevated temperature deformation and intergranular failure.