|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Effect of Laser Scan Strategy and Post Processing on High Strain Rate Deformation Response of Additively Manufactured Stainless Steel
||Brandon McWilliams, Brahmananda Pramanik, Andelle Kudzal, Bruce Madigan
|On-Site Speaker (Planned)
In this work the effect of laser scan strategy and post processing were studied with respect to the resulting microstructure and the high strain rate compressive deformation response of powder bed fusion additively manufactured 17-4 stainless steel. Two different scan strategies were implemented including a hexagonal island strategy and a concentric ring strategy. Quasi-static and high strain rate compression samples were tested using a split Hopkinson pressure bar at strain rates from 1200-2200/s. Specimens were tested in the as-built, heat treated, and hot isostatic pressed and heat treated conditions. Porosity concentration and distribution within the samples were quantified using micro computed tomography. It was found that the material has a strain rate dependent yield strength and that the presence of porosity strongly influences the high strain rate flow stress, whereas at quasi-static rates this effect is not observed.
||Planned: Supplemental Proceedings volume