Elimination of gas holes of laser cladding on 2A12 aluminum alloys

Laser cladding Al-Y(6%Y) was used to repair corrosion damage of 2A12 aluminum alloys.One group of the specimens was shocked on every deposited layer, the other was only deposited Al-Y(6%Y).After aging and fatigue test, fracture and element test were studied.The results show that the safety life of the shocked specimen is 871% of the specimens without shock and there was no pore in the deposited layer which is joined firmly with the substrate.There were many pores in the deposited layer of the specimens without shock, which lead to reduction of the safety life.The element test indicates that parts of the substrate is engaged in metallurgical procedure and the element Y is seriously burnt.