About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
|
Presentation Title |
Effects of Preheating and Multi-laser Melting of Refractory Alloys in Laser Powder Bed Fusion |
Author(s) |
Frank M. Brinkley, Christopher Ledford, Michael Kirka |
On-Site Speaker (Planned) |
Frank M. Brinkley |
Abstract Scope |
Processing of refractory materials and alloys via laser powder bed fusion (L-PBF) has proven difficult due to the high melting temperature, high ductile-to-brittle transition temperature, and the high cooling rates present. This work investigates the effects of high temperature build plate heating (up to 1200°C) and heat input from multiple lasers (a focused master laser and a defocused slave laser) on the melt morphology and cracking behavior of refractory alloys (Mo and W) using single laser track experiments. The effects of laser power, scan speed, beam pathing, and preheating temperature on processability are investigated. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |