|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing of Metals: Establishing Location Specific, Processing-Microstructure-Property-Relationships III
||Design-to-Components, Closed-loop Research and Development for Gas Atomization and Selective Laser Meltin of Metallic Alloys
||Sharon Park, Le Zhou, Edward Dein, Yongho Sohn
|On-Site Speaker (Planned)
A correlation among gas atomization parameters, production yield and microstructure was examined for Aluminum alloy powders to be employed for powder bed fusion (PBF) additive manufacturing (AM). Alloy powders of were batch-produced while systematically varying the atomizing pressure (1.0 – 3.0 MPa), melt temperature (800 - 950║C) and flow rate (0.7 – 2.3 kg/min). Powders were characterized for production yield, per-particle-size yield, and microstructure by using digital scale, laser diffraction particle analyzer and electron microscopy, respectively. Flow rate was identified as the most influential processing parameter. The atomization process was optimized to yield powder size, 75.0 wt% for < 75 m and 35.0 wt% for < 45 m, a suitable range for AM. Secondary dendrite arm spacing measurements were taken to estimate the cooling rate of approximately 3250 K/s for < 45 m powders. A correlation between powder characteristics and PBF parts will be examined.
||Planned: Supplemental Proceedings volume