Research on deformation and residual stress for overhanging structure of semi-circular hole by selective laser melting

The simulation model of unsupported semi-circular hole overhanging structure of SLM formed AlSi10Mg alloy was established based on Simufact additive. The total distortion and residual stress in different processes were analyzed. The effects of geometric parameter thickness and inner and outer circle radius on the max total distortion and max residual stress were studied. The results show that the max total distortion and the max residual stress increase with the increase of the thickness of the semi-circular hole; the radius of the inner circle of the semi-circular hole becomes larger, and the max total distortion tends to increase; the outer radius of the semi-circular hole becomes larger, and the max total distortion decreases, but it has little effect on the total distortion.