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 language | English (US) |
|---|---|
| Article number | 105029 |
| Journal | International Journal of Refractory Metals and Hard Materials |
| Volume | 84 |
| DOIs | |
| State | Published - Nov 1 2019 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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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 journal › Article
TY - JOUR
T1 - Directed energy deposition of molybdenum
AU - Johnson, John L.
AU - Palmer, Todd
PY - 2019/11/1
Y1 - 2019/11/1
N2 - 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.
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.
UR - http://www.scopus.com/inward/record.url?scp=85069918528&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85069918528&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmhm.2019.105029
DO - 10.1016/j.ijrmhm.2019.105029
M3 - Article
VL - 84
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
SN - 0958-0611
M1 - 105029
ER -