Tantalum tungsten alloy is a very important and widely used high temperature and high strength material in tantalum alloy, especially high tantalum tungsten alloy, which is widely used in some extremely harsh conditions. Tantalum alloy with high tungsten content has higher creep strength and lower creep speed, so it is a good candidate material for heat-resistant components. Due to its high density, high melting point, corrosion resistance, good processability, weldability and other characteristics, it has been gradually applied in the fields of weapons, aerospace and other fields in recent years, working in a harsh high-temperature environment. In recent years, the research of tantalum-tungsten alloy in China has been carried out gradually. The preparation technology, structure, static mechanical properties at room temperature and high temperature of tantalum-tungsten alloy have been studied, and the dynamic mechanical properties of tantalum-tungsten alloy have also been studied. Dynamic mechanical properties generally refer to the mechanical properties when the strain rate is 100~103 s-1, and 104~ 106s-1 belongs to the range of ultra-high strain rate. FIG. 1 shows the test classification characterized by strain rate [3]. Under very harsh conditions such as dynamic load and impact load, the failure failure of materials will be different from that under static load, and their mechanical properties will be completely different from that under static load.
As an important structural material and functional material, tantalum tungsten alloy is gradually replacing other materials. For example, tantalum tungsten alloy is used as the drug type housing material for explosively formed EFP warhead in armor fragmentation projectile, which can greatly improve the penetration power of EFP. Tantalum tungsten alloy can be used as the coating material for tungsten solid target in high energy accelerator, which can solve the problem of easy corrosion of tungsten target in hot water environment with proton irradiation. Tantalum tungsten alloy is used in chemical corrosion resistance device. Compared with glass and graphite and other non-metals, it has good plasticity and high thermal conductivity, and is suitable for manufacturing heat exchangers. The manufacturing methods of tantalum tungsten alloy parts mainly include mechanical cutting forming, sheet stamping forming and rolling forming, as shown in figure 1. The precision of stamping or rolling parts is low, which needs to be machined to meet the requirement of manufacturing precision.
