|About this Abstract
||MS&T23: Materials Science & Technology
||Metal Powder Synthesis and Processing: Fundamental Aspects and Modeling
||Flowability and Suitability of Mechanically Derived Powders for Additive Manufacturing
||David F. Bahr, John E. Barnes, John Hunter Martin
|On-Site Speaker (Planned)
||David F. Bahr
Metal additive manufacturing (AM) provides the opportunity of “on demand” customizable fabrication to minimize supply chain constraints. However, powder availability could become a similar constraint, and creating affordable regional sources for low-embodied energy powders will be a crucial step in distributed manufacturing. A powder creation method using cold mechanically derived (CMD) of particulates can create a wide range of alloy compositions with approximately 90% less embodied energy than gas atomization (GA). We will demonstrate the morphology and flowability of Al 7075 and Copper 14500 powders made via GA and MF are similar at rates appropriate for powder bed additive methods. Particle morphology descriptions (size and shape) do not strongly correlate to tap density in this case. Laser powder bed fusion tensile specimens were formed from AL 7075 and heat treated to T6; the GA and CMD powders showed equivalent performance to both each other and conventionally wrought 7075.