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Powder Metallurgy Produced TZM Alloy Plate Properties Analysis

Modern TZM alloy industrial production usually uses powder metallurgy method. In order to improve the properties of the alloy, should process rolling in changed direction and intermediate heat treatment, which not only can eliminate the stress of the alloy, but also can improve its mechanical properties.

Analyze the mechanical properties and process performance tests on TZM alloy, which produces by powder metallurgy. TZM alloy plate blank cold rolling at 45°orientation has a certain degree tensile property. After annealing at 850 ℃, the plate in all directions at room temperature has tensile strength.

With incomplete pole figure method estimates the orientation distribution function (ODP) of 0.5mm powder metallurgy produced TZM alloy plate in the processing state and eliminate stress state (850 ℃/h) showing that the states of the alloy plate blank will affect alloy plate’ texture And the states and orientation of plate blank’s affected the mechanical properties at room temperature of alloy plate is connected with texture type of plate blank.

Alloy state and orientation will great impact curved plastic-brittle transition temperature. When alloy at cold state, the bending performance has better direction. After 850 ℃ annealed, the plastic - brittle transition temperature is decreased, and the lateral amplitude transformation temperature is lowered significantly. After eliminated stress, in all directions of alloy plate transition temperature is similar and below 0 ℃, so the alloy plate is preferably used after stress relief.

After complete recrystallization, there is not elongation on alloy plate. And the curved plastic-brittle transition temperature is increased to above room temperature. So we should avoid use alloy plate above the recrystallization temperature. Alloy plate starting recrystallization temperature is 1200 ℃ and the ending recrystallization temperature is 1600 ℃.

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