Grain boundary engineering for additive manufacturing

Lou, Xiaoyuan; Dolley, Evan Jarrett; Morra, Martin Matthew

Title: Grain boundary engineering for additive manufacturing

Patent · Tue May 05 00:00:00 EDT 2020

OSTI ID:1650844

Lou, Xiaoyuan; Dolley, Evan Jarrett; Morra, Martin Matthew

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.

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Research Organization:: General Electric Co., Niskayuna, NY (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: NE0008428

Assignee:: General Electric Company (Niskayuna, NY)

Patent Number(s):: 10,639,719

Application Number:: 15/279,182

OSTI ID:: 1650844

Resource Relation:: Patent File Date: 09/28/2016

Country of Publication:: United States

Language:: English

References (15)

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