In what aspects is the toughness of tungsten alloy screws embodied? Mainly including fracture toughness, impact toughness, and ductility. First, fracture toughness: KIC value 20-40MPa·m^{1/2}, resisting crack propagation, matrix phase bridging grains enhancing this aspect. Second, impact toughness: Charpy value 10-30J, absorbing impact energy, applicable to vibration environments. Third, ductility: Elongation 5%-30%, allowing plastic deformation, avoiding brittle fracture. Fourth, high-temperature toughness: Maintains toughness at 1000°C, no embrittlement. Fifth, microstructural toughness: Grain refinement reduces defects, improving fatigue resistance. These aspects make screws reliable in medical and aerospace.
