Laser pulse shaping for additive manufacturing
Abstract
A system for additive manufacturing uses a pulsed laser beam with one or more low flux components on the order of kW/cm2, and one or more high flux components on the order of MW/cm2 during the duration of the pulse. The pulsed laser beam is directed onto the powder particles on the substrate thereby melting the powder particles and melting the substrate at the interface layer between the powder and the substrate such that the powder particles bond to the substrate. This is accomplished by using low power (and low cost) lasers to do the majority of the energy transfer, and using high power (and higher cost) lasers to complete the melting process, overcoming the kinetics of powder agglomeration through surface tension forces by partially melting the powder-substrate interface layer before surface tension can take effect on the molten powder particles.
- Inventors:
- Issue Date:
- Research Org.:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1568706
- Patent Number(s):
- 10,376,987
- Application Number:
- 15/010,107
- Assignee:
- Lawrence Livermore National Security, LLC (Livermore, CA)
- DOE Contract Number:
- AC52-07NA27344
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 01/29/2016
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Demuth, James A., Bayramian, Andrew J., Duoss, Eric B., Kuntz, Joshua D., and Spadaccini, Christopher M. Laser pulse shaping for additive manufacturing. United States: N. p., 2019.
Web.
Demuth, James A., Bayramian, Andrew J., Duoss, Eric B., Kuntz, Joshua D., & Spadaccini, Christopher M. Laser pulse shaping for additive manufacturing. United States.
Demuth, James A., Bayramian, Andrew J., Duoss, Eric B., Kuntz, Joshua D., and Spadaccini, Christopher M. Tue .
"Laser pulse shaping for additive manufacturing". United States. https://www.osti.gov/servlets/purl/1568706.
@article{osti_1568706,
title = {Laser pulse shaping for additive manufacturing},
author = {Demuth, James A. and Bayramian, Andrew J. and Duoss, Eric B. and Kuntz, Joshua D. and Spadaccini, Christopher M.},
abstractNote = {A system for additive manufacturing uses a pulsed laser beam with one or more low flux components on the order of kW/cm2, and one or more high flux components on the order of MW/cm2 during the duration of the pulse. The pulsed laser beam is directed onto the powder particles on the substrate thereby melting the powder particles and melting the substrate at the interface layer between the powder and the substrate such that the powder particles bond to the substrate. This is accomplished by using low power (and low cost) lasers to do the majority of the energy transfer, and using high power (and higher cost) lasers to complete the melting process, overcoming the kinetics of powder agglomeration through surface tension forces by partially melting the powder-substrate interface layer before surface tension can take effect on the molten powder particles.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {8}
}
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