What are the high temperature properties of Mo La and TZM alloys?
The high temperature properties and microstructure of MoLa alloy and TZM alloy at 1000 ~ 1800 ℃ were studied. The results show that the molybdenum lanthanum alloy has higher comprehensive properties of strength and plasticity when the temperature is less than 1400 ℃. When the temperature is higher than or equal to 1400 ℃, the tensile strength and plasticity of molybdenum lanthanum alloy decrease. However, with the increase of testing temperature, the tensile strength of TZM alloy decreases, but the plasticity of TZM molybdenum alloy increases, which is contrary to that of molybdenum lanthanum alloy. At the same time, TZM alloy is better than molybdenum lanthanum alloy at the same temperature both in strength and plasticity. The microstructure observation shows that the recrystallization of these two kinds of molybdenum alloys starts at 1100 ℃ and continues to 1550 ℃, and the recrystallized grains are elongated, which is different from the equiaxed grains in the recrystallized state of pure molybdenum.
