About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing: Materials Design and Alloy Development V – Design Fundamentals
|
Presentation Title |
Impact of Starting Particle Content and Laser Powder Bed Fusion Processing on Microstructure and Material Properties in A6061-RAM Alloys |
Author(s) |
Chloe B. Johnson, Michael Kaufman, Adam Polizzi, Jeremy Iten, Amy Clarke |
On-Site Speaker (Planned) |
Chloe B. Johnson |
Abstract Scope |
Aluminum alloys are excellent candidates for light-weighting using laser powder bed fusion additive manufacturing (AM), which can produce parts with complex cooling channels, allowing lower operating temperature alloys to withstand higher temperatures. However, aluminum alloys are difficult to print, having a high thermal conductivity, low absorptivity, and large solidification range, which can cause solidification cracking during the final stages of solidification. Reactive additive manufacturing (RAM) alloys, which contain micron-scale particles that undergo a thermodynamically favorable reaction in the melt during AM to generate product, submicron inoculant particles, present a method to fully refine the grain structure and prevent solidification cracking in AM aluminum alloys. Partially dissolved additive particles and submicron inoculants also give RAM alloys composite properties. The types and amount of reactive particles in RAM powder feedstocks allow for tailoring of material properties and performance to different applications and generate unique microstructures based on RAM content and AM processing. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Aluminum, Characterization |