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TZM Alloy Deformation Resistance Affected By Deformation Temperature

TZM alloy has good mechanical property and high temperature performance, in industry, metallurgical industry, aerospace and other fields has been widely used. But TZM alloy has high deformation temperature, high deformation resistance, and poor low temperature ductility, so during rolling process it is difficult, limiting its application and development in the relevant field. In the rolling process, the deformation resistance is an important criterion to determine the rolling process, and different rolling process the deformation resistance and morphology of alloy is different, so understanding the effects of different rolling parameters on deformation resistance can optimize rolling process, improve the mechanical properties and the application of TZM alloys.

Using powder metallurgy m to produce TZM alloy billet obtained by mixing, pressing and sintering. Putting the billets at -1500 thermal simulator in a vacuum state process rolling thermal simulation test of the alloy billet. The deformation was 50% and the experimental temperature was 1150 ℃, 1200 ℃, 1250 ℃ and 1300 ℃. Besides, the deformation rate is 1s^-1, 3s^-1 and 5s^-1. TZM alloy deformation resistance is related to deformation temperature and deformation rate, and the following will main analyze the relationship between the deformation resistance and deformation temperature.

Under certain deformation rate, deformation resistance increase with the rolling deformation temperature rises. This is because when the deformation temperature increases, metal atoms’ kinetic energy in the alloy increases as well, which decreased the dislocation resistance. In the other hand, space, interstitial atoms and other disadvantages defects also more active, resulting in dynamic softening to reduce flow stress. What’s more, when the deformation temperature increases, there will have a new sliding system which produces on the internal original sliding systems of alloy, to enhance the interoperability of the alloy, reducing the dislocation density, improving alloy’s plastic deformation.

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