Studies on the Fracture Behaviour for 93 Tungsten Alloy

Studies on the spallation behavior for 93 tungsten alloy have been performed with a compressed gas gun and a manganin piezoresistance gauge technique. It is found that tensile strain rate, alloy elements and metallurgical technology can significantly influence the fracture strength of this material. The metallographic and SEM examination of the recovered specimen show that 93 tungsten alloy spalls in a brittle way, the dominant fracture mode being cleavage of tungsten grains. Moreover, the interior damage degree of the tungsten alloy target is related to the tensile strain rate.