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Meeting Materials Science & Technology 2020
Symposium Additive Manufacturing: Qualification and Certification
Presentation Title The Effects of Powder Particle Size Distribution on the Powder and Part Performance of Laser Powder Bed Fusion 17-4 PH Stainless Steel
Author(s) Jordan S. Weaver, Justin Whiting, Carlos Beauchamp, Max Peltz, Thien Phan, Vipin Tondare, Jared Tarr, Alkan Donmez
On-Site Speaker (Planned) Jordan S. Weaver
Abstract Scope The powder particle size distribution (PSD) is an important precursor material specification; however, the effects of small changes in the PSD on powder and part performance are not fully realized. In this study, three Argon atomized 17-4 PH stainless steel powders with small shifts in their PSD’s (fine, medium, and coarse) were characterized and used to build samples for metallography and mechanical testing. Powder performance measurements (tapped density, Hall flowmeter, rheometer, pycnometer, and spreading) provide a ranking of the powders from best to worst as coarse, medium, and fine. However, microstructure quantification (density, grain size, and crystallographic texture) and mechanical testing (Rockwell hardness and uniaxial tension) reveal that all three powders produce nearly identical, acceptable parts with slightly higher hardness and strength for the medium powder. The results reveal the process is robust for static mechanical properties with regards to small changes in PSD with a range in powder performance.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Comprehensive Digital Platform for Additive Manufacturing
A Multi-Sensor Comparative Study for Fatigue Prognosis of Additively Manufactured Metallic Specimens
Connecting Metal Powder Morphological Characteristics with Flowability Properties Using Machine Learning
CT Based Analysis of Generation and Characterization of Parameter- and Process-induced Defects in Powder Bed Fusion Additive Manufacturing
Effect of Sample Geometry and Orientation on Tensile Properties of Ti-6Al-4V Manufactured by Electron Beam Melting
Ensuring Build Quality thru Physics-based Support Design Optimization for Residual Stress
Influence of Printing Parameters within the Binder-powder Interaction
Introductory Comments: Additive Manufacturing: Qualification and Certification
Physics-based Qualification for Laser Powder Bed Fusion AM
Pore Formation in Laser Powder Bed Fusion Inconel 718 through Multiphysics Modeling
Post-build Heat Treatment of Wire-arc Additive Manufactured 410 SS for Hardness Tuning
Recyclability of Ti-6Al-4V Powders Used in Additive Manufacturing
Reducing Anisotropic Deformation of LPBF Inconel 718 for Applications in Extreme Conditions
Reducing Heat Buildup and Regularizing Melt Pool Dimensions in Laser Powder Bed Fusion through a “Powder Moat” Scan Strategy
Similarity Analysis and Clustering of Thermal History to Understand Process-structure Relationships
Simulation of the Effect of Texture on Anisotropy in SLM-Produced IN718 Microstructures
The Effects of Powder Particle Size Distribution on the Powder and Part Performance of Laser Powder Bed Fusion 17-4 PH Stainless Steel
Unveiling the Relationships between Powder Bed Conditions and Materials Quality during Selective Laser Melting

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