Effect of heat treatment and welding on mechanical properties of low-alloy molybdenum alloys in a wide temperature range

The short-term strength and ductility of rolled thin sheets from low-alloy molybdenum alloys TsM-10, TsM-6, TsM-12, and MI-5 in deformed, polygonized, recrystallized, and cast states is studied in the temperature range 20–2000°C. It is shown that the high-temperature strength of these alloys can be increased by a factor of 1.1–1.6 by annealing at 1150–1500°C for 1 h. Welded joints of molybdenum alloys are shown to have a lower strength than the base metal at 20–1500°C but commonly have a comparable strength in the high-temperature region.