Directed energy deposition of molybdenum

John L. Johnson, Todd Palmer

Research output: Contribution to journalArticle

Abstract

Two directed energy deposition processes were evaluated for additive manufacturing of molybdenum. First, a laser-based process was used to deposit plasma spheroidized molybdenum powder. The effects of laser power, substrate temperature, and substrate composition on deposition quality were explored. Second, an electron beam-based process was used to deposit molybdenum wire on molybdenum substrates at two deposition rates. Depositions up to 100 mm wide by 500 mm long with minimal porosity and cracking were produced, but residual stress resulted in significant distortion of the substrates for a thickness of 12 mm.

Original languageEnglish (US)
Article number105029
JournalInternational Journal of Refractory Metals and Hard Materials
Volume84
DOIs
StatePublished - Nov 1 2019

Fingerprint

Molybdenum
Substrates
Molybdenum deposits
3D printers
Lasers
Deposition rates
Powders
Electron beams
Residual stresses
Porosity
Wire
Plasmas
Chemical analysis
Temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

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abstract = "Two directed energy deposition processes were evaluated for additive manufacturing of molybdenum. First, a laser-based process was used to deposit plasma spheroidized molybdenum powder. The effects of laser power, substrate temperature, and substrate composition on deposition quality were explored. Second, an electron beam-based process was used to deposit molybdenum wire on molybdenum substrates at two deposition rates. Depositions up to 100 mm wide by 500 mm long with minimal porosity and cracking were produced, but residual stress resulted in significant distortion of the substrates for a thickness of 12 mm.",
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Directed energy deposition of molybdenum. / Johnson, John L.; Palmer, Todd.

In: International Journal of Refractory Metals and Hard Materials, Vol. 84, 105029, 01.11.2019.

Research output: Contribution to journalArticle

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AB - Two directed energy deposition processes were evaluated for additive manufacturing of molybdenum. First, a laser-based process was used to deposit plasma spheroidized molybdenum powder. The effects of laser power, substrate temperature, and substrate composition on deposition quality were explored. Second, an electron beam-based process was used to deposit molybdenum wire on molybdenum substrates at two deposition rates. Depositions up to 100 mm wide by 500 mm long with minimal porosity and cracking were produced, but residual stress resulted in significant distortion of the substrates for a thickness of 12 mm.

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