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Title: Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel

Abstract

In this work, deformation mechanism of a laser weld on neutron irradiated AISI 304L stainless steel was studied by in-situ microcompression test at room temperature. The deformation-induced austenite-to-martensite phase transformation occurs in {101}-oriented grains in the irradiated base metal, while deformation twinning prevails in {101}-oriented grains in the weld heat affected zone (HAZ). A high number density of irradiation-induced voids in the base metal provide sufficient nucleation sites for the austenite-to-martensite phase transformation under compression at room temperature. A deformation map is established to predict critical twinning stress for face-centered cubic (fcc) metals and alloys. Our study suggests that irradiation can tailor the deformation-induced phase transformation in austenitic stainless steels.

Authors:
ORCiD logo [1];  [2];  [2];  [3];  [4];  [5];  [4];  [4];  [3]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Purdue Univ., West Lafayette, IN (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
  2. Idaho National Lab. (INL), Idaho Falls, ID (United States)
  3. Purdue Univ., West Lafayette, IN (United States)
  4. Texas A & M Univ., College Station, TX (United States)
  5. Westinghouse Electric Company LLC, Pittsburgh, PA (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Idaho National Lab. (INL), Idaho Falls, ID (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1606809
Alternate Identifier(s):
OSTI ID: 1580288
Grant/Contract Number:  
AC05-00OR22725; AC07-051D14517; SC0020150; NE0008525
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Nuclear Materials
Additional Journal Information:
Journal Volume: 528; Journal Issue: C; Journal ID: ISSN 0022-3115
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Irradiation; Deformation mechanism; Austenitic stainless steel; In-situ microcompression tests; Void

Citation Formats

Mao, Keyou S., Sun, Cheng, Liu, Xiang, Qu, Haozheng J., French, Aaron J., Freyer, Paula D., Garner, Frank A., Shao, Lin, and Wharry, Janelle P.. Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel. United States: N. p., 2019. Web. https://doi.org/10.1016/j.jnucmat.2019.151878.
Mao, Keyou S., Sun, Cheng, Liu, Xiang, Qu, Haozheng J., French, Aaron J., Freyer, Paula D., Garner, Frank A., Shao, Lin, & Wharry, Janelle P.. Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel. United States. https://doi.org/10.1016/j.jnucmat.2019.151878
Mao, Keyou S., Sun, Cheng, Liu, Xiang, Qu, Haozheng J., French, Aaron J., Freyer, Paula D., Garner, Frank A., Shao, Lin, and Wharry, Janelle P.. Tue . "Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel". United States. https://doi.org/10.1016/j.jnucmat.2019.151878. https://www.osti.gov/servlets/purl/1606809.
@article{osti_1606809,
title = {Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel},
author = {Mao, Keyou S. and Sun, Cheng and Liu, Xiang and Qu, Haozheng J. and French, Aaron J. and Freyer, Paula D. and Garner, Frank A. and Shao, Lin and Wharry, Janelle P.},
abstractNote = {In this work, deformation mechanism of a laser weld on neutron irradiated AISI 304L stainless steel was studied by in-situ microcompression test at room temperature. The deformation-induced austenite-to-martensite phase transformation occurs in {101}-oriented grains in the irradiated base metal, while deformation twinning prevails in {101}-oriented grains in the weld heat affected zone (HAZ). A high number density of irradiation-induced voids in the base metal provide sufficient nucleation sites for the austenite-to-martensite phase transformation under compression at room temperature. A deformation map is established to predict critical twinning stress for face-centered cubic (fcc) metals and alloys. Our study suggests that irradiation can tailor the deformation-induced phase transformation in austenitic stainless steels.},
doi = {10.1016/j.jnucmat.2019.151878},
journal = {Journal of Nuclear Materials},
number = C,
volume = 528,
place = {United States},
year = {2019},
month = {11}
}

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Cited by: 3 works
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