Several main tantalum alloys and their properties

Due to the low strength of pure tantalum, it can not meet the requirements of some mechanical equipment, so its application is limited to some extent. So people developed and produced corrosion resistant tantalum alloys with different strength. Ta-W binary system is the most important tantalum alloy system. Currently, commercially available Ta-W binary system alloys include Ta-2.5W, Ta-7.5W and Ta-10W.Ta-8W-2Hf and Ta-10W-2.5Hf ternary alloys were developed by adding 2%-2.5% Hf on the basis of Ta-W binary alloy. These alloys have high high temperature strength, creep resistance and good processing plasticity, and have been widely used in chemical, electronic, aerospace and atomic energy industries.

In the Ta-W binary system, new tantalum alloys with high strength and high plasticity, such as Ta-12W, Ta-13W and Ta-15W, can also be obtained. These tantalum alloys have higher creep strength and lower creep rate due to their higher tungsten content than TA-10W alloys. In order to test the mechanical properties of the above four alloys at room temperature and high temperature strength at 1600t, the mechanical properties of Ta-10W, Ta-12W, Ta-13W and Ta-15W alloys annealed at 1600 ℃ for 1 h were investigated.

It can be seen that the strength of these alloys increases with the increase of tungsten content, while their elongation and reduction of section change only slightly. However, the high temperature mechanical properties of Ta-10W and Ta12W alloys are significantly different at 1600℃.

The high temperature mechanical properties of the new binary tantalum alloy not only improve with the increase of tungsten content, but also the effect is more significant. It is an excellent candidate material for high temperature resistant structure in atomic energy, aerospace, electronics industry, etc.