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Title: Microstructure Development of 308L Stainless Steel During Additive Manufacturing

Abstract

$In$ $situ$ high-energy X-ray diffraction measurements were completed during deposition of 308L stainless steel wire onto a 304L stainless steel substrate. Attempts were made to extract microstructural features such as phase fraction and internal stress, as well as temperature evolution immediately following the deposition. The limited data that could be collected during deposition and rapid solidification are critically examined. High-energy X-rays coupled with relatively slow detectors were utilized to enable determination of orientation-dependent lattice parameters accurately enough to comment on phase strain evolution between austenite and ferrite. Here, information about the hydrostatic and deviatoric stress states of the constituent phases was determined on time scales that are relevant to their development. However, the time resolution of the technique was insufficient to monitor phase evolution during the solid–solid phase transformation and, more so, during solidification. Moreover, the accurate and absolute determination of inherently statistical parameters, such as phase fraction, depends critically on the ability to sample a statistically significant numbers of grains in the microstructure.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [2];  [3];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Colorado School of Mines, Golden, CO (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1511613
Report Number(s):
LA-UR-18-29774
Journal ID: ISSN 1073-5623
Grant/Contract Number:  
89233218CNA000001; AC52-06NA25396; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science
Additional Journal Information:
Journal Volume: 50; Journal Issue: 5; Journal ID: ISSN 1073-5623
Publisher:
ASM International
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; additive manufacture

Citation Formats

Brown, Donald William, Losko, Adrian Simon, Carpenter, John S., Cooley, Jason Christopher, Clausen, Bjorn, Dahal, Jinesh, Kenesei, Peter, and Park, J. S. Microstructure Development of 308L Stainless Steel During Additive Manufacturing. United States: N. p., 2019. Web. doi:10.1007/s11661-019-05169-1.
Brown, Donald William, Losko, Adrian Simon, Carpenter, John S., Cooley, Jason Christopher, Clausen, Bjorn, Dahal, Jinesh, Kenesei, Peter, & Park, J. S. Microstructure Development of 308L Stainless Steel During Additive Manufacturing. United States. doi:10.1007/s11661-019-05169-1.
Brown, Donald William, Losko, Adrian Simon, Carpenter, John S., Cooley, Jason Christopher, Clausen, Bjorn, Dahal, Jinesh, Kenesei, Peter, and Park, J. S. Fri . "Microstructure Development of 308L Stainless Steel During Additive Manufacturing". United States. doi:10.1007/s11661-019-05169-1.
@article{osti_1511613,
title = {Microstructure Development of 308L Stainless Steel During Additive Manufacturing},
author = {Brown, Donald William and Losko, Adrian Simon and Carpenter, John S. and Cooley, Jason Christopher and Clausen, Bjorn and Dahal, Jinesh and Kenesei, Peter and Park, J. S.},
abstractNote = {$In$ $situ$ high-energy X-ray diffraction measurements were completed during deposition of 308L stainless steel wire onto a 304L stainless steel substrate. Attempts were made to extract microstructural features such as phase fraction and internal stress, as well as temperature evolution immediately following the deposition. The limited data that could be collected during deposition and rapid solidification are critically examined. High-energy X-rays coupled with relatively slow detectors were utilized to enable determination of orientation-dependent lattice parameters accurately enough to comment on phase strain evolution between austenite and ferrite. Here, information about the hydrostatic and deviatoric stress states of the constituent phases was determined on time scales that are relevant to their development. However, the time resolution of the technique was insufficient to monitor phase evolution during the solid–solid phase transformation and, more so, during solidification. Moreover, the accurate and absolute determination of inherently statistical parameters, such as phase fraction, depends critically on the ability to sample a statistically significant numbers of grains in the microstructure.},
doi = {10.1007/s11661-019-05169-1},
journal = {Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science},
number = 5,
volume = 50,
place = {United States},
year = {2019},
month = {3}
}

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Works referenced in this record:

Laser additive manufacturing of metallic components: materials, processes and mechanisms
journal, May 2012