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Title: System and method for grain refinement and general control of grain morphology in laser additive manufacturing

Abstract

The present disclosure relates to a system for forming a material layer that may make use of an optical light source for generating an optical beam, and a beam shaping subsystem configured to shape the optical beam to generate a complex beam intensity profile. The complex shaped beam may be used to selectively melt at least portions of a bed of powder particles residing on a substrate during formation of the material layer, as the optical light source is moved. A computer may be used to control the optical light source. The complex beam intensity profile enables control over the microstructure of grains formed during melting of the powder particles as the material layer is formed.

Inventors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1805373
Patent Number(s):
10,888,956
Application Number:
16/010,111
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Patent
Resource Relation:
Patent File Date: 06/15/2018
Country of Publication:
United States
Language:
English

Citation Formats

Roehling, Tien, Guss, Gabe, Khairallah, Saad A., Matthews, Manyalibo Joseph, and Wu, Sheldon S. System and method for grain refinement and general control of grain morphology in laser additive manufacturing. United States: N. p., 2021. Web.
Roehling, Tien, Guss, Gabe, Khairallah, Saad A., Matthews, Manyalibo Joseph, & Wu, Sheldon S. System and method for grain refinement and general control of grain morphology in laser additive manufacturing. United States.
Roehling, Tien, Guss, Gabe, Khairallah, Saad A., Matthews, Manyalibo Joseph, and Wu, Sheldon S. 2021. "System and method for grain refinement and general control of grain morphology in laser additive manufacturing". United States. https://www.osti.gov/servlets/purl/1805373.
@article{osti_1805373,
title = {System and method for grain refinement and general control of grain morphology in laser additive manufacturing},
author = {Roehling, Tien and Guss, Gabe and Khairallah, Saad A. and Matthews, Manyalibo Joseph and Wu, Sheldon S.},
abstractNote = {The present disclosure relates to a system for forming a material layer that may make use of an optical light source for generating an optical beam, and a beam shaping subsystem configured to shape the optical beam to generate a complex beam intensity profile. The complex shaped beam may be used to selectively melt at least portions of a bed of powder particles residing on a substrate during formation of the material layer, as the optical light source is moved. A computer may be used to control the optical light source. The complex beam intensity profile enables control over the microstructure of grains formed during melting of the powder particles as the material layer is formed.},
doi = {},
url = {https://www.osti.gov/biblio/1805373}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {1}
}