Finite Element Analysis of the Milling of Ti6Al4V Titanium Alloy Laser Additive Manufacturing Parts

This study aimed to analyze the defects of large residual stress in laser additive manufacturing metal parts by establishing a milling numerical simulation Ti6Al4V titanium alloy thin-walled based on Johnson-Cook constitutive model alloy, modified Coulomb friction model, physical chip separation criterion and other theories, combined with finite element software ABAQUS. The influences depth, initial temperature speed forming quality formed part were analyzed. results show that changes distribution deposition layer, which can reduce or even change tensile surface layer produced process into compressive stress, equivalent Mises decreases 47% compared original surface. When increases from 20 °C 400 °C, maximum 26%.