|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture
||Fatigue Prediction for AlSi10Mg Parts Produced by Laser Powder-bed Fusion
||P.Chris Pistorius, Ming Tang
|On-Site Speaker (Planned)
Previous fatigue results showed that AlSi10Mg parts produced by laser powder-bed fusion can have fatigue resistance similar to conventionally cast parts, and that the fatigue life is controlled by the applied stress and pores. In uniaxial fatigue tests cracks grew from defects exposed at the sample surface. The population of defects depends on the building parameters; if lack-of-fusion pores are avoided, the largest and most common pores are associated with oxides. The oxide-induced pores are similar in appearance to defects in cast aluminum parts; the size and prevalence of these pores are lower for parts built with smaller hatch spacings. The fatigue life can be predicted based on the applied stress range and the distribution of pore sizes on polished planes by using a Gumbel distribution.
||Planned: Supplemental Proceedings volume