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Residual Stress Characterization on the Mesoscale in Additive Manufacturing

Residual stress in advanced manufacturing techniques including additive manufacturing (AM) has become an important area of research with the increasing popularity of these methods. Because of the specialized environments in which AM takes place there are factors influencing the microstructure and morphology at the grain and subgrain scale which are not present in conventional manufacturing techniques [1]. Powder bed fusion processes such as direct metal laser sintering (DMLS) and selective laser melting (SLM) introduce high thermal gradients and quick cooling times which increase heterogeneity on the mesoscale (between 0.1 and 10μm) in polycrystalline materials including residual stress and strain on this scale [1, 2].