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Title: Evolution of cellular dislocation structures and defects in additively manufactured austenitic stainless steel under ion irradiation

Abstract

Here, the evolution of irradiation-induced defects in additively manufactured (AM) austenitic stainless steel was explored in situ by 1 MeV Kr ion irradiation at 450 and 600 °C in a transmission electron microscope. Cellular dislocation structure in AM steel act as sink/trap sites for the irradiation-induced defects, resulting in the lower density and smaller dislocation loops in AM steel than conventional forged (CF) steel at 450 °C. The higher stacking fault energy and local stress concentration induced by cellular dislocation structure in AM steel promotes the unfaulting process and the formation of network dislocation at 600 °C.

Authors:
ORCiD logo [1];  [2];  [2];  [3];  [2];  [3]
  1. Univ. of Science and Technology, Beijing (China); Argonne National Lab. (ANL), Argonne, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Univ. of Science and Technology, Beijing (China)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Office of Nuclear Energy (NE); National Natural Science Foundation of China (NNSFC); China Scholarship Council (CSC)
OSTI Identifier:
1578045
Grant/Contract Number:  
AC02-06CH11357; AC07-051D14517
Resource Type:
Accepted Manuscript
Journal Name:
Scripta Materialia
Additional Journal Information:
Journal Volume: 178; Journal Issue: C; Journal ID: ISSN 1359-6462
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Additive manufacturing; Austenitic stainless steel; Cellular dislocation structure; Ion irradiation; Irradiation-induced defect

Citation Formats

Li, Shilei, Hu, Jing, Chen, Wei-Ying, Yu, Jingyue, Li, Meimei, and Wang, Yandong. Evolution of cellular dislocation structures and defects in additively manufactured austenitic stainless steel under ion irradiation. United States: N. p., 2019. Web. doi:10.1016/j.scriptamat.2019.11.036.
Li, Shilei, Hu, Jing, Chen, Wei-Ying, Yu, Jingyue, Li, Meimei, & Wang, Yandong. Evolution of cellular dislocation structures and defects in additively manufactured austenitic stainless steel under ion irradiation. United States. doi:10.1016/j.scriptamat.2019.11.036.
Li, Shilei, Hu, Jing, Chen, Wei-Ying, Yu, Jingyue, Li, Meimei, and Wang, Yandong. Wed . "Evolution of cellular dislocation structures and defects in additively manufactured austenitic stainless steel under ion irradiation". United States. doi:10.1016/j.scriptamat.2019.11.036.
@article{osti_1578045,
title = {Evolution of cellular dislocation structures and defects in additively manufactured austenitic stainless steel under ion irradiation},
author = {Li, Shilei and Hu, Jing and Chen, Wei-Ying and Yu, Jingyue and Li, Meimei and Wang, Yandong},
abstractNote = {Here, the evolution of irradiation-induced defects in additively manufactured (AM) austenitic stainless steel was explored in situ by 1 MeV Kr ion irradiation at 450 and 600 °C in a transmission electron microscope. Cellular dislocation structure in AM steel act as sink/trap sites for the irradiation-induced defects, resulting in the lower density and smaller dislocation loops in AM steel than conventional forged (CF) steel at 450 °C. The higher stacking fault energy and local stress concentration induced by cellular dislocation structure in AM steel promotes the unfaulting process and the formation of network dislocation at 600 °C.},
doi = {10.1016/j.scriptamat.2019.11.036},
journal = {Scripta Materialia},
number = C,
volume = 178,
place = {United States},
year = {2019},
month = {11}
}

Journal Article:
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This content will become publicly available on November 27, 2020
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