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TZM Alloy High Temperature Properties

TZM alloy has good high temperature property, so it can be made of high temperature components used in various fields. TZM alloy High temperature properties include high-temperature tensile property, high temperature oxidation resistance property, high-temperature fatigue property, and high-temperature bending and creep property.

High temperature tensile property: High-temperature tensile property influence by many factors, such as different forms TZM alloy, TiC and ZrC doping method, production method and temperature. TZM alloy after deformation, as the temperature rises, the tensile strength decreased significantly. Zr alloy element added in pure Zr has best results, the amount of 0.1%, having highest performance. And Ti element added in TiH2 has best results, the amount of 0.8%, the alloy having better performance. Using powder metallurgic method and melting method to produce TZM plate the performance is equivalent, but the strength of TZM bars prepared by melting method was significantly higher than prepared by powder metallurgy method.

High temperature fatigue resistance: TZM alloy fatigue life at 500 ℃ and 350 ℃ has little difference, but at 500 ℃ fatigue life is slightly lower than 350 ℃. At 350 ~ 500 ℃, the thermal fatigue life of the alloy is significantly lower than the fatigue life at 350 ~ 500 ℃. This may be caused by the synthetic effect of temperature and cyclic loading, such that the fatigue life is lower than the thermal fatigue life. With the increase of the maximum cyclic stress, fatigue life shortening, elongation increased.

High temperature oxidation resistance: TZM alloy in high temperature oxidation rate is very fast, it can not generate antioxidant protection layer to protect itself. There are two methods for improving high-temperature oxidation resistance property which are alloying methods and coating method, and the coating method has better effect.

High temperature bending and creep property: TZM alloy creep is toward compressive strain direction, and when fatigue life reaches at 2% to 10%, creep direction changes to stretching strain. Creep property is closely related with stress intensity and temperature. Cyclic stress range increases, the more serious cyclic creep. With increasing temperature, cyclic creep has become more apparently.

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