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Analysis the Room Temperature Mechanical Properties of TZM Alloy After Rolling Deformation

TZM alloy after appropriately rolling deformation become tight and room temperature mechanical properties of alloy has been greatly improved. The tensile strength of TZM alloy is more than 840Mpa and the elongation is more than 4%. Besides, the gain is finer. What’s more, its tensile properties are better than un-rolling deformation TZM alloy. Since un-rolling deformation alloy’s Mo grains have weak combine and grain boundaries is weaker, so in lesser strain and lower energy it is easy to become the source of cracks. The rolled alloy, the grain after pressure processing stretched into a fibrous distribution and interplay with Mo grains so the greatly reduced susceptibility of alloy to crack.
At the same time, due to the fine grain size, in the same amount of deformation the deformation dispersed in more crystal grains to operate. The difference of strain ratio in grains and the grain boundary is difference and deformation is more uniform so stress concentration reduces. Alloy can withstand large amount of deformation before breaking. And because fine grain size, grain boundaries zigzags, is not conducive to the spread of crack resulting in the fracture process can absorb more energy, resulting in a relatively large elongation, performance good room temperature toughness.

 

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