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Meeting Materials Science & Technology 2019
Symposium Additive Manufacturing: Effective Production, Characterization, and Recycling of Powder Materials
Presentation Title Assessment of 316L Stainless Steel Powder Produced from Recycled Machining Chips for Closed Lifecycle Additive-Subtractive Manufacturing
Author(s) Marcus A. Jackson, Justin D. Morrow, John F. Konopka, Dan Thoma, Frank E. Pfefferkorn
On-Site Speaker (Planned) Marcus A. Jackson
Abstract Scope The objective of this work is to compare 316L stainless steel powder produced by ball milling of 316L stainless steel machining chips to traditional melt-atomized powder feedstock. This powder production method is key to enabling closed lifecycle additive-subtractive manufacturing – a vision for sustainable material manufacturing wherein the machining chips produced by subtractive manufacturing are mechanically processed, without melting, into feedstock for additive manufacturing and thus recycled. In this work, a wrought bar of 316L stainless steel is end milled to produce chips, which are ball milled to reduce their size to form a powder. The particle size, morphology, and chemistry of the powder is then assessed by scanning electron microscopy and energy dispersive x-ray spectroscopy and compared with similar assessment of traditional melt-atomized powder feedstock. The feasibility of this method to produce feedstock for a Laser Engineered Net Shaping (LENS) additive manufacturing system is then presented.
Proceedings Inclusion? Planned: At-meeting proceedings


Additive Manufacturing Alloys: Influence of Powder Preparation Method in Aluminum Matrix Composites
Assessment of 316L Stainless Steel Powder Produced from Recycled Machining Chips for Closed Lifecycle Additive-Subtractive Manufacturing
Characterization of Gas Atomized Aluminum Alloy Powder for Additive Manufacturing Applications
Characterization of Nickel-base Superalloy MAR-M247 Powders by Synchrotron X-ray Computed Tomography
Characterization of Titanium Powder Produced from Battlefield Scrap for Additive Manufacturing
Determination of Viscosity of Metal Melts by High Temperature Rheometry
Effects of Recycling PREP and Plasma Atomized Ti-6Al-4V Powder from LENS Process
Exploring the Feasibility of Cryomilled Aluminum Alloy 5083 as Feed Stock Material for Additive Manufacturing
Hydrogen Assisted Magnesiothermic Reduction (HAMR) for Making Low-oxygen Ti Powder
Metal Particulate Produced by Modulation-assisted Machining
P3-26: Identifying Correlations between Metal Powder Properties and Binder Jet Print Settings to Optimize Process
Potentials and Risks in Hybrid Manufacturing
Powder Specification Needs for Steels in the LPBF Process
Surface Area as a Powder Morphology Probe
Synchrotron X-ray CT of AM Feedstock Metal Powder: A Validation of Metallographic Porosity Measurements.
Understanding Powder Morphology and Its Effect on Flowability through Computer Vision and Machine Learning In Additive Manufacturing
Understanding Surface Area Measurement for Improved Powder Characterization

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