About this Abstract |
Meeting |
Materials Science & Technology 2020
|
Symposium
|
Additive Manufacturing: Materials, Alloy Development, Microstructure and Properties
|
Presentation Title |
3D Characterization of Intrinsic Defects in Water- and Gas- Atomized 17-4 PH Stainless Steel Powder Precursors for Additive Manufacturing |
Author(s) |
Veeraraghavan Sundar, Rachel Reed |
On-Site Speaker (Planned) |
Veeraraghavan Sundar |
Abstract Scope |
Powder precursors have a critical effect on the outcome of AM processes. Two atomization routes (water- and gas- atomization) were used to create 17-4 PH stainless steel precursors for laser bed powder fusion processing at energy densities of ~ 100J/cc. Particle characteristics (size distribution, size width, apparent density, tap density), XRD, and mechanical testing (density, UTS, HRC and elongation %) were used to characterize the powders and AM parts. In addition, automated serial sectioning was used to characterize particle morphology and size distribution, as well as microstructure and defect distribution in the LPBF AM parts. A clear differentiation was demonstrated between the two processing techniques. |