TENSILE AND IMPACT PROPERTIES OF TZM AND MO-5-PERCENT RE

Some aspects of the mechanical behaviour of two molybdenum alloys, one belonging to the precipitation hardened sub-family (TZM) and the othe r is a solid solution Mo 5% rhenium-bearing alloy, have been investiga ted. Experimental data (tensile mechanical strength, ductility and imp act properties of unirradiated materials) show that a difference in be haviour exists between the precipitation hardened and the solid soluti on strengthened alloy, but at the same time a serious discrepancy has been found between the present results and previously reported ductile to brittle transition temperature values for Mo alloys.