レーザ照射型金属積層造形における熱変形と残留応力の解析

抄録

The thermal deformation of double cantilever specimen with support structures made from Ni-base alloy, Inconel 718, fabricated by selective laser melting (SLM) was estimated by thermos-elastic-plastic finite element method. The temperature dependent physical properties, coefficient of thermal elongation, Young modulus, and two-linear-line hardening law, were considered in the numerical analysis. The estimated deformation values were compared with the experimentally fabricated double cantilever specimens' dimensions. The difference of estimated values and measured values were around 1%, though the layer compilation process of SLM was not considered in the analysis.