Residual Stress Analysis of Additive Manufactured A356.2 Aluminum Alloys using X-Ray Diffraction Methods

The physical properties of metal-based structural materials, such as hardness, strength and toughness, are directly or indirectly affected by residual stress inside on the surface given part. Repeated rapid heating cooling during additive manufacturing process causes thermal gradients expansion contraction in material, which stress. Tensile stresses known to exist manufactured products should be kept a minimum they affect mechanical lead product deformation failure. Therefore, it is important evaluate after making control under desired conditions. There limitations using destructive method commonly used for evaluation with products, due difficulties repeated measurements, size, cost issues. necessary apply non-destructive verify validity method. In this study, A356.2 aluminum alloy powders were powder bed fusion process, generated was measured. X-ray diffraction (XRD) methods observe After XRD measurement, analyses performed Williamson-Hall plot, sin2ψ, cosα methods. measurement results samples through LPBF characteristics each discussed.