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Meeting Materials Science & Technology 2019
Symposium Additive Manufacturing: Effective Production, Characterization, and Recycling of Powder Materials
Presentation Title Hydrogen Assisted Magnesiothermic Reduction (HAMR) for Making Low-oxygen Ti Powder
Author(s) Pei Sun, Z. Zak Fang, Ying Zhang, Yang Xia, Hyrum Lefler, Tuoyang Zhang
On-Site Speaker (Planned) Pei Sun
Abstract Scope Hydrogen assisted magnesiothermic reduction (HAMR) is a low-cost technology for making Ti and Ti alloy powders with low oxygen. Due to the strong affinity for oxygen, making low-oxygen Ti always requires extensive and costly refining processes. Simple reactions between Mg and TiO2 cannot produce Ti metal with low oxygen content due to thermodynamic limits (Ti-O solid solutions with 1-2 wt.% O is more stable than MgO). In order to overcome the thermodynamic barrier, hydrogen is introduced to destabilize Ti-O solid solutions, thus enabling Mg, in the presence of hydrogen, to extract oxygen out from Ti solid to a very low level. HAMR process has been successfully used to produce low oxygen Ti and Ti alloy powders with O <0.15 wt.%. The principles of HAMR technology can also be utilized to recycle used Ti powders from additive manufacturing.
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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