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Title: Grain boundary engineering for additive manufacturing

Abstract

In one embodiment, a method of manufacturing a metal part using a laser or electron beam during a powder bed additive manufacturing process includes melting each of a number of layers of metal powder of the metal part with an effective amount of energy using the laser or electron beam to form the metal part such that at least one or more portions of the metal part have a critical amount of residual strain. The method also includes performing a heat treatment on the metal part that transforms the residual strain into substantially distributed coincidence site lattice (CSL) grain boundaries, low angle grain boundaries, or both in the metal part.

Inventors:
; ;
Issue Date:
Research Org.:
General Electric Co., Niskayuna, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1650844
Patent Number(s):
10639719
Application Number:
15/279,182
Assignee:
General Electric Company (Niskayuna, NY)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
B - PERFORMING OPERATIONS B33 - ADDITIVE MANUFACTURING TECHNOLOGY B33Y - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
DOE Contract Number:  
NE0008428
Resource Type:
Patent
Resource Relation:
Patent File Date: 09/28/2016
Country of Publication:
United States
Language:
English

Citation Formats

Lou, Xiaoyuan, Dolley, Evan Jarrett, and Morra, Martin Matthew. Grain boundary engineering for additive manufacturing. United States: N. p., 2020. Web.
Lou, Xiaoyuan, Dolley, Evan Jarrett, & Morra, Martin Matthew. Grain boundary engineering for additive manufacturing. United States.
Lou, Xiaoyuan, Dolley, Evan Jarrett, and Morra, Martin Matthew. Tue . "Grain boundary engineering for additive manufacturing". United States. https://www.osti.gov/servlets/purl/1650844.
@article{osti_1650844,
title = {Grain boundary engineering for additive manufacturing},
author = {Lou, Xiaoyuan and Dolley, Evan Jarrett and Morra, Martin Matthew},
abstractNote = {In one embodiment, a method of manufacturing a metal part using a laser or electron beam during a powder bed additive manufacturing process includes melting each of a number of layers of metal powder of the metal part with an effective amount of energy using the laser or electron beam to form the metal part such that at least one or more portions of the metal part have a critical amount of residual strain. The method also includes performing a heat treatment on the metal part that transforms the residual strain into substantially distributed coincidence site lattice (CSL) grain boundaries, low angle grain boundaries, or both in the metal part.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {5}
}

Patent:

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Works referenced in this record:

Corrosion resistant steel structural member
patent, April 1990


Selected processing for non-equilibrium light alloys and products
patent, April 2003


Thermo-mechanical process to enhance the quality of grain boundary networks
patent, November 2014


Ferritic stainless steel having excellent formability
patent, August 1984