High temperature properties of hydrogenated Ti50Zr25Co25 rapidly quenched alloy

Abstract

The high temperature properties of hydrogenated Ti50Zr25Co25 ribbons were investigated upto 380 degrees C. As indicated by tensile tests at room temperature, hydrogen-induced strengthening occurred until similar to 21 at.% hydrogen. At this range of hydrogen concentration varying from 0 to similar to 21 at.%, tensile tests conducted at high temperatures (300 degrees to 400 degrees C; strain rate: 10(-4)s(-1)) showed that in addition to enhancement in strength, elongation larger than 20% was obtained. The temperature range at which such property improvements occurred depends on the hydrogen concentration. The change in the mechanical properties in this range of H,., and temperature is attributed to the corresponding changes in the thermal behaviour of the alloy, along with the inherent structural modifications induced by hydrogen addition.