Abstract：Aiming at the phenomenon of abnormal ablation on the surface of W-7Cu infiltrated with tungsten and
copper, samples were taken from the rudder surface and guard plate of returned part, and the ablative characteristics,
microstructure, surface debris, fracture morphology and metallographic structure of samples were compared
and analyzed. The results showed that rudder surface’s ablation was more sever, both propellant residue on the
surfaces were distributed, the fracture apperance was dominated by transgranular and intergranular fracture, no
abnormal tissue was found; According to the results of metallographic and transmission electron microscope, the
cavity of rudder surface is more than that of the guard plate, and copper leaks exist in both areas, energy spectrum
analysis showed that the copper content has different gradients, the copper precipitation at rudder surface
was significant that affected by three kinds of working conditions including temperature, time and scour speed.
The study conclusions can provide a basis for subsequent failure analysis and quality control of tungsten-impregnated
copper gas rudder products.
2024, Vol. 34 
