About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
Use of Powder with Non-spherical Morphology in a Laser Powder Bed Fusion Additive Manufacturing Process |
Author(s) |
Mahya Shahabi, Tianyu Zhu, Yao Xu, Jagannath Jayachandran, Sneha Prabha Narra |
On-Site Speaker (Planned) |
Mahya Shahabi |
Abstract Scope |
Depending on the alloy and the powder manufacturing methods, the powder can be a cost contributor in powder bed fusion metal additive manufacturing processes. On the other hand, it is not always possible to produce spherical powders using gas atomization processes especially for materials with a high melting point. Hence, the focus of this work is to demonstrate the opportunity to work with powders with irregular morphology in a laser powder bed fusion process. We investigated the use of 17-4 precipitation hardening (PH) stainless steel water atomized powders that have a non-spherical morphology. Optimal deposition conditions were developed to achieve the part density that is comparable to samples fabricated with standard spherical powders. Overlap percentage between laser tracks was found to be the key factor for controlling porosity in the as-fabricated parts. This work demonstrates the possibility to use alternate irregular morphology powders in powder bed fusion processes. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |