|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Fatigue and Fracture
||Influence of Build-angle on Charpy Impact Fracture of Laser Powder Bed 3D-printed Stainless Steel and Aluminum Cast Alloy
||Brahmananda Pramanik, Kristofer Kuelper, MD. Salahuddin, Bruce Madigan
|On-Site Speaker (Planned)
This work investigated the influence of build-angle with respect to the fracture toughness and the absorbed energy of as-built laser powder bed 3D-printed stainless steel and aluminum cast alloy. Fracture toughness was estimated applying fractal method on fractured surface. Absorbed energies of the respective materials built at 0, 30, 60 and 90 degree angles were obtained using pendulum impact tester. Lateral expansion of the impacted specimen was measured using lateral expansion gage. Shear fracture percentage and fractal data were quantified by observing fractured surface of the failed specimen under 3D-digital microscope at up to 1000x magnification. Printed aluminum cast alloy showed more prominent brittle shear, whereas fracture region of printed stainless steel showed a mixture of cleavage and ductile-dimple fracture morphologies. It was found that as-built printed materials have significant build-angle dependency on absorbed energy and fracture toughness.
||Planned: Supplemental Proceedings volume