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Title: Structural representation of additively manufactured 316L austenitic stainless steel

Abstract

Three 316L stainless steel materials are studied and reported upon; wrought, as-built additively manufactured (AM), and heat-treated AM material. The AM material was produced from the laser engineered net shaping (LENS) process. Macroscopic uniaxial compression stress-strain curves were obtained for all three materials. The curves were similar for the wrought and heat-treated AM materials but the as-built AM material demonstrated approximately 1.7 times greater flow stress at any given level of strain than the other two materials. Electron-backscatter diffraction analysis of the materials also showed that the microstructures of the three materials differed; with complex grain morphology for the as-built AM material. The mean grain size of each of the three materials also differed. Furthermore, the initial dislocation density was also measured with neutron diffraction and line-profile analysis for both wrought and as-built AM materials with the density in the AM material approximately 2.5 times greater.

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [3]; ORCiD logo [3]; ORCiD logo [3]
  1. Univ. of Wisconsin - Madison, Madison, WI (United States)
  2. Univ. of Alabama in Huntsville, Huntsville, AL (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1494481
Report Number(s):
LA-UR-18-29418
Journal ID: ISSN 0749-6419
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
International Journal of Plasticity
Additional Journal Information:
Journal Name: International Journal of Plasticity; Journal ID: ISSN 0749-6419
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Additive manufacturing; Plastic slip; Dislocation density; Flow stress; Polycrystal plasticity; Stainless steel

Citation Formats

Bronkhorst, Curt Allan, Mayeur, Jason Rhea, Livescu, Veronica, Pokharel, R., Brown, Donald William, and Gray, III, George Thompson. Structural representation of additively manufactured 316L austenitic stainless steel. United States: N. p., 2019. Web. doi:10.1016/j.ijplas.2019.01.012.
Bronkhorst, Curt Allan, Mayeur, Jason Rhea, Livescu, Veronica, Pokharel, R., Brown, Donald William, & Gray, III, George Thompson. Structural representation of additively manufactured 316L austenitic stainless steel. United States. doi:10.1016/j.ijplas.2019.01.012.
Bronkhorst, Curt Allan, Mayeur, Jason Rhea, Livescu, Veronica, Pokharel, R., Brown, Donald William, and Gray, III, George Thompson. Wed . "Structural representation of additively manufactured 316L austenitic stainless steel". United States. doi:10.1016/j.ijplas.2019.01.012.
@article{osti_1494481,
title = {Structural representation of additively manufactured 316L austenitic stainless steel},
author = {Bronkhorst, Curt Allan and Mayeur, Jason Rhea and Livescu, Veronica and Pokharel, R. and Brown, Donald William and Gray, III, George Thompson},
abstractNote = {Three 316L stainless steel materials are studied and reported upon; wrought, as-built additively manufactured (AM), and heat-treated AM material. The AM material was produced from the laser engineered net shaping (LENS) process. Macroscopic uniaxial compression stress-strain curves were obtained for all three materials. The curves were similar for the wrought and heat-treated AM materials but the as-built AM material demonstrated approximately 1.7 times greater flow stress at any given level of strain than the other two materials. Electron-backscatter diffraction analysis of the materials also showed that the microstructures of the three materials differed; with complex grain morphology for the as-built AM material. The mean grain size of each of the three materials also differed. Furthermore, the initial dislocation density was also measured with neutron diffraction and line-profile analysis for both wrought and as-built AM materials with the density in the AM material approximately 2.5 times greater.},
doi = {10.1016/j.ijplas.2019.01.012},
journal = {International Journal of Plasticity},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Journal Article:
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This content will become publicly available on January 30, 2020
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