Evaluation of residual stress in stainless steel 316L and Ti6Al4V samples produced by selective laser melting
Virtual and Physical Prototyping
Department of Mechanical and Mechatronic Engineering, Central University of Technology, Free State, South Africa
Selective laser melting (SLM) has great potential in additive manufacturing because it enables the production of full-density complex parts with the desired inner structure and surface morphology. High temperature gradients as a result of the locally concentrated energy input lead to residual stresses, crack formation and part deformation during processing or after separation from the supports and the substrate. In this study, an X-ray diffraction technique and numerical simulation were used for investigating the residual stress in SLM samples fabricated from stainless steel 316L and Ti6Al4V alloy. Conclusions regarding directions and values of stresses in SLM objects are given. © 2015 Taylor & Francis.
3D printers; Alloy steel; Computer simulation; Melting; Numerical models; Residual stresses; Titanium alloys; X ray diffraction; Additive Manufacturing; Energy inputs; High temperature gradient; Inner structure; Selective laser melting; Stainless steel 316L; Ti-6Al-4V alloy; X-ray diffraction techniques; Stainless steel