|About this Abstract
||2nd International Conference on Technological Innovations in Metals Engineering (TIME)
||Technological Innovations in Metals Engineering (TIME)
||Fracture and Fatigue Crack Behavior of Selective Laser Melted AlSi10Mg with Systematically Induced Defects
||Austin Q. Ngo, Varthula Jayasekera, Brett Conner, Griffin Jones, Kenneth Meinert, John J Lewandowski
|On-Site Speaker (Planned)
||Austin Q. Ngo
Laser powder bed fusion processing of alloys can be used to build replacement parts for critical structural applications. To ensure mechanical reliability of additively manufactured parts, we study the effects of defects formed during processing on mechanical behavior and properties. Mechanical test specimens of AlSi10Mg were fabricated via selective laser melting. Specimens were built using optimized, defect-free parameters, and sub-optimal parameters to systematically induce lack of fusion defects of varying sizes. Different post-processing treatments were applied to baseline and defect-induced specimens to study the effects of heat treatment and/or HIP on defect population and mechanical properties. Computed tomography was used to characterize internal defect contents and the reliability of nondestructive defect detection for quality assurance. Mechanical data was generated via tensile testing, constant amplitude fatigue testing, fracture toughness testing, and fatigue crack growth testing. The effects of defects, build orientation, and post-processing on the subsequent mechanical properties will be covered.