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Title: Anomalous Annealing Response of Directed Energy Deposited Type 304L Austenitic Stainless Steel

Directed energy deposited (DED) and forged austenitic stainless steels possess dissimilar microstructures but can exhibit similar mechanical properties. In this study, annealing was used to evolve the microstructure of both conventional wrought and DED type 304L austenitic stainless steels, and significant differences were observed. In particular, the density of geometrically necessary dislocations and hardness were used to probe the evolution of the microstructure and properties. Forged type 304L exhibited the expected decrease in measured dislocation density and hardness as a function of annealing temperature. Here, the more complex microstructure–property relationship observed in the DED type 304L material is attributed to compositional heterogeneities in the solidification microstructure.
Authors:
 [1] ;  [2] ;  [3] ; ORCiD logo [2]
  1. Univ. of California, Davis, CA (United States)
  2. Sandia National Lab. (SNL-CA), Livermore, CA (United States)
  3. Univ. of California, Davis, CA (United States); Univ. of California, Irvine, CA (United States)
Publication Date:
Report Number(s):
SAND-2018-12162J
Journal ID: ISSN 1047-4838; 669068
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
JOM. Journal of the Minerals, Metals & Materials Society
Additional Journal Information:
Journal Volume: 70; Journal Issue: 3; Journal ID: ISSN 1047-4838
Publisher:
Springer
Research Org:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1482736

Smith, Thale R., Sugar, Joshua D., Schoenung, Julie M., and San Marchi, Chris. Anomalous Annealing Response of Directed Energy Deposited Type 304L Austenitic Stainless Steel. United States: N. p., Web. doi:10.1007/s11837-017-2711-1.
Smith, Thale R., Sugar, Joshua D., Schoenung, Julie M., & San Marchi, Chris. Anomalous Annealing Response of Directed Energy Deposited Type 304L Austenitic Stainless Steel. United States. doi:10.1007/s11837-017-2711-1.
Smith, Thale R., Sugar, Joshua D., Schoenung, Julie M., and San Marchi, Chris. 2018. "Anomalous Annealing Response of Directed Energy Deposited Type 304L Austenitic Stainless Steel". United States. doi:10.1007/s11837-017-2711-1. https://www.osti.gov/servlets/purl/1482736.
@article{osti_1482736,
title = {Anomalous Annealing Response of Directed Energy Deposited Type 304L Austenitic Stainless Steel},
author = {Smith, Thale R. and Sugar, Joshua D. and Schoenung, Julie M. and San Marchi, Chris},
abstractNote = {Directed energy deposited (DED) and forged austenitic stainless steels possess dissimilar microstructures but can exhibit similar mechanical properties. In this study, annealing was used to evolve the microstructure of both conventional wrought and DED type 304L austenitic stainless steels, and significant differences were observed. In particular, the density of geometrically necessary dislocations and hardness were used to probe the evolution of the microstructure and properties. Forged type 304L exhibited the expected decrease in measured dislocation density and hardness as a function of annealing temperature. Here, the more complex microstructure–property relationship observed in the DED type 304L material is attributed to compositional heterogeneities in the solidification microstructure.},
doi = {10.1007/s11837-017-2711-1},
journal = {JOM. Journal of the Minerals, Metals & Materials Society},
number = 3,
volume = 70,
place = {United States},
year = {2018},
month = {1}
}