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Title: 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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Works referenced in this record:

Multiple material systems for selective beam sintering
patent, July 1990


Laser-directed fabrication of full-density metal articles using hot isostatic processing
patent, June 1997


Multiple material systems for selective beam sintering
patent, January 1995


Method for selective laser sintering with layerwise cross-scanning
patent, October 1992