The air hole is one of the common defects of titanium alloy bar casting. The size of a single air hole is generally no more than 2-3mm, and the small one can reach the micron or submicron level that is invisible to the naked eye. Pores are one of the sources of cracks in castings, reducing the fracture and
Fatigue performance
When hot isostatic pressing is used to treat the casting, the internal pores on the surface can be closed for the first time. And generally does not affect the stability of the size of the cast titanium alloy bar, but the surface pores and the subsurface pores communicating with the surface must be removed by good welding, repair welding and polishing.