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

Keyou S. Mao; Cheng Sun; Xiang Liu; Haozheng J. Qu; Aaron J. French; Paula D. Freyer; Frank A. Garner; Lin Shao; Janelle P. Wharry

doi:10.1016/j.jnucmat.2019.151878

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

Keyou S. Mao, Cheng Sun, Xiang Liu, Haozheng J. Qu, Aaron J. French, Paula D. Freyer, Frank A. Garner, Lin Shao, Janelle P. Wharry

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English (US)
Article number	151878
Journal	Journal of Nuclear Materials
Volume	528
DOIs	https://doi.org/10.1016/j.jnucmat.2019.151878
State	Published - Jan 2020
Externally published	Yes

Keywords

Austenitic stainless steel
Deformation mechanism
In-situ microcompression tests
Irradiation
Void

ASJC Scopus subject areas

Nuclear and High Energy Physics
General Materials Science
Nuclear Energy and Engineering

Online availability

10.1016/j.jnucmat.2019.151878

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title = "Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel",

abstract = "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.",

keywords = "Austenitic stainless steel, Deformation mechanism, In-situ microcompression tests, Irradiation, Void",

author = "Mao, {Keyou S.} and Cheng Sun and Xiang Liu and Qu, {Haozheng J.} and French, {Aaron J.} and Freyer, {Paula D.} and Garner, {Frank A.} and Lin Shao and Wharry, {Janelle P.}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = jan,

doi = "10.1016/j.jnucmat.2019.151878",

language = "English (US)",

volume = "528",

journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effect of laser welding on deformation mechanisms in irradiated austenitic stainless steel

AU - Mao, Keyou S.

AU - Sun, Cheng

AU - Liu, Xiang

AU - Qu, Haozheng J.

AU - French, Aaron J.

AU - Freyer, Paula D.

AU - Garner, Frank A.

AU - Shao, Lin

AU - Wharry, Janelle P.

PY - 2020/1

Y1 - 2020/1

N2 - 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.

AB - 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.

KW - Austenitic stainless steel

KW - Deformation mechanism

KW - In-situ microcompression tests

KW - Irradiation

KW - Void

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U2 - 10.1016/j.jnucmat.2019.151878

DO - 10.1016/j.jnucmat.2019.151878

M3 - Article

AN - SCOPUS:85076042062

SN - 0022-3115

VL - 528

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

M1 - 151878

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

Online availability

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