|About this Abstract
||2023 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Effect of Volumetric Defects on the Fatigue Behavior of Laser Powder Bed Fused Ti-6Al-4V
||Muztahid Muhammad, Shuai Shao, Nima Shamsaei
|On-Site Speaker (Planned)
Additively manufactured parts contain process-induced volumetric defects which can be detrimental to fatigue performance. This study investigated the effect of defects on the fatigue behavior of the laser powder bed fused (L-PBF) Ti-6Al-4V specimens. Cylindrical rods of L-PBF Ti-6Al-4V were fabricated with large variations (total six sets) in process parameters to induce different types of defects. After stress relief, cylindrical rods were removed from the build plates and machined to standard fatigue test specimens. A high resolution X-ray Computed Tomography machine was employed to analyze the defect distribution of selected specimens resulting from each set of process parameters before fatigue testing. Fully-reversed force-controlled fatigue tests were conducted at room temperature using a servo-hydraulic load frame. A scanning electron microscope was utilized to analyze the microstructure and fracture surfaces. The size and shape of the crack initiating defects were attempted to be correlated with the measured fatigue properties.
||Additive Manufacturing, Titanium, Other