|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Effects of Gas Pressure on Melt Track Shape and Quality in SLM
||Jonathan Gibbs, Christoph Meier, Ryan Penny, Stuart Baker, Yu Zou, Johannes Weinberg, Reimar Weissbach, Martin Feldmann, A. John Hart
|On-Site Speaker (Planned)
Selective laser melting (SLM) is rapidly being adopted for additive manufacturing (AM) of metal components, achieving locally high density and near-net shape geometric accuracy. The dynamics of the melt pool and stability of the melt track upon cooling are critical to the microstructure, porosity, and final properties of the solidified material. Using a custom-built miniature SLM system, we study the effect of ambient gas pressure on the melt pool and solidified track, and elucidate how pressure performs as a control variable to influence surface quality, porosity, and material loss due to evaporation. Select results are presented for steel and magnesium alloys, and results are further interpreted using in situ infrared metrology and simulations of the melt pool dynamics.
||Planned: Supplemental Proceedings volume