Additive Manufacturing of Pure Mo and Mo + TiC MMC Alloy by Electron Beam Powder Bed Fusion

Christopher Rock, Edgar Lara-Curzio, Betsy Ellis, Christopher Ledford, Donovan N. Leonard, Rangasayee Kannan, Michael Kirka, Timothy Horn

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A metal matrix composite powder of molybdenum (Mo) + TiC was produced by mechanical alloying (MA) and used in additive manufacturing by electron beam powder bed fusion along with pure Mo powder to form sandwich structures. The Mo + TiC solid layers formed mixed structures of Mo with discrete TiC particles, eutectic Mo + TiC, and Mo dendrites. Thermodynamic modeling showed that the system contained an invariant eutectic reaction in the composition range used and indicated that the system was highly sensitive to changes in composition and temperature.

Original languageEnglish
Pages (from-to)4202-4213
Number of pages12
JournalJOM
Volume72
Issue number12
DOIs
StatePublished - Dec 2020

Funding

A portion of this research was sponsored by the U.S. Department of Energy's Fossil Energy Program Office, Clean Coal and Carbon Management Program, under contract DE-AC05-00OR22725 with UT-Battelle, LLC and partially performed at the Oak Ridge National Laboratory’s Manufacturing Demonstration Facility, an Office of Energy Efficiency and Renewable Energy user facility. The Talos F200X S/TEM tool is provided by US DOE, Office of Nuclear Energy, Fuel Cycle R&D Program, and the Nuclear Science User Facilities. This work was performed in part at the Analytical Instrumentation Facility at NC State University, which is supported by the State of NC and the National Science Foundation (#ECCS-1542015). The authors thank Paul Mason and Adam Hope at Thermo-Calc for their expertise in data translation and running selected models.

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