Dynamic behavior of tungsten alloys with different grain sizes

Experimental Lagrangian analysis technique was adopted to investigate the dynamic behavior of 91W-6.3Ni-2.7Fe with three kinds grain sizes of 1-3 μm, 10-15 μm and 30-40 μm. The stress-time history curves at different Lagrangian positions were obtained for tungsten alloys at different impact velocities. Lagrangian analysis technique was used to discuss the mechanical properties of the tungsten alloys under high strain rate. The mechanical quantities at different Lagrangian positions, such as strain, specific volume, density, strain rate, specific internal energy and particle velocity were obtained. The influence of grain size on the dynamic behavior of tungsten alloys under high strain rate was analyzed and the stress-strain curves (10⁴-10⁵s^-1) of the tungsten alloys were given.