Fracture mechanical investigations on Selective Laser Melting materials
Selective Laser Melting (SLM) is a powder bed based additive manufacturing process.Using SLM,material efficient producing of complex delicate components becomes feasible.The input data required for this is solely a design model.The present paper deals with crack growth behavior in Compact Tension specimens (CT specimens) manufactured in layers.These specimens were built of titanium alloy Ti-6-4 and stainless steel 316L using the selective laser melting process.In order to analyze the effect of porosity and residual stresses on the crack growth behavior and on the fracture mechanical properties different heat treatments were performed.Conclusions about the influence of material isotropy could be made by analyses on specimens with perpendicular as well as parallel initial crack orientation related to the building direction.Additionally,data for reference material were conducted in order to compare fracture mechanical properties of selective laser melted Ti-6-4 with conventionally processed Ti-6-4.Numerical simulation of crack propagation in a hip joint implant was performed using the software ADAPCRACK3D.Thus,it could be shown that material condition exhibits significant effect on the residual lifetime of SLM processed components consisting of Ti-6-4.
Additive Manufacturing (AM) Selective Laser Melting (SLM) fatigue crack growth heat treatment
Hans Albert Richard Andre Riemer Eric Klemp
Institute of Applied Mechanics,University of Paderborn,Germany;Direct Manufacturing Research Center Direct Manufacturing Research Center DMRC,University of Paderborn
国际会议
北京
英文
1-8
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）