X-ray Tomographic Observation of Environmental Assisted Cracking in Heat-treated Lean Duplex Stainless Steel

Kenichiro Eguchi; Timothy Burnett; Dirk Engelberg

doi:10.1016/j.corsci.2021.109363

X-ray Tomographic Observation of Environmental Assisted Cracking in Heat-treated Lean Duplex Stainless Steel

Kenichiro Eguchi, Timothy Burnett, Dirk Engelberg

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Abstract

The occurrence of environmental assisted cracking (EAC) has been observed in heat-treated lean duplex stainless steel via X-ray computed tomography (X-ray CT) and cross-sectional microstructure analysis. Selective corrosion of the ferrite phase occurred at the sample surface, with internal corrosion triggered by applied plastic strain. The observed cracks mainly propagated along ferrite-ferrite boundaries, with crack arrest associated with ferrite-austenite grain boundaries. Crack propagation during EAC fracture was observed, in-operando. The sudden appearance of EAC occurred due to the suppression of crack opening by ductile austenite phase. The reduced EAC resistance was attributed to hydrogen embrittlement effects.

Original language	English
Article number	109363
Journal	Corrosion Science
Volume	184
DOIs	https://doi.org/10.1016/j.corsci.2021.109363
Publication status	Published - 15 May 2021

Keywords

Duplex stainless steel
Enviromental assisted cracking
Stress corrosion cracking
X-ray computed tomography

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10.1016/j.corsci.2021.109363

FInal Manuscript(in-situ SCC for duplex stainless steel)revised-2Accepted author manuscript, 7.07 MB

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@article{9cf3a40031c34e858e888f8fad670f85,

title = "X-ray Tomographic Observation of Environmental Assisted Cracking in Heat-treated Lean Duplex Stainless Steel",

abstract = "The occurrence of environmental assisted cracking (EAC) has been observed in heat-treated lean duplex stainless steel via X-ray computed tomography (X-ray CT) and cross-sectional microstructure analysis. Selective corrosion of the ferrite phase occurred at the sample surface, with internal corrosion triggered by applied plastic strain. The observed cracks mainly propagated along ferrite-ferrite boundaries, with crack arrest associated with ferrite-austenite grain boundaries. Crack propagation during EAC fracture was observed, in-operando. The sudden appearance of EAC occurred due to the suppression of crack opening by ductile austenite phase. The reduced EAC resistance was attributed to hydrogen embrittlement effects.",

keywords = "Duplex stainless steel, Enviromental assisted cracking, Stress corrosion cracking, X-ray computed tomography",

author = "Kenichiro Eguchi and Timothy Burnett and Dirk Engelberg",

note = "Funding Information: The experimental facilities in the Henry Royce Institute for Advanced Materials established through EPSRC funding for Henry Moseley X-ray Imaging Facility under grant Nos. EP/M010619 , EP/K004530 , EP/F007906 , EP/F001452 , EP/I02249X , EP/F028431 is acknowledged in addition to HEFCE funding through the UK Research Partnership Investment Funding (UKRPIF) Manchester RPIF Round 2 for the Multiscale Characterisation Facility. Publisher Copyright: {\textcopyright} 2021",

year = "2021",

month = may,

day = "15",

doi = "10.1016/j.corsci.2021.109363",

language = "English",

volume = "184",

journal = "Corrosion Science",

issn = "0010-938X",

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T1 - X-ray Tomographic Observation of Environmental Assisted Cracking in Heat-treated Lean Duplex Stainless Steel

AU - Eguchi, Kenichiro

AU - Burnett, Timothy

AU - Engelberg, Dirk

N1 - Funding Information: The experimental facilities in the Henry Royce Institute for Advanced Materials established through EPSRC funding for Henry Moseley X-ray Imaging Facility under grant Nos. EP/M010619 , EP/K004530 , EP/F007906 , EP/F001452 , EP/I02249X , EP/F028431 is acknowledged in addition to HEFCE funding through the UK Research Partnership Investment Funding (UKRPIF) Manchester RPIF Round 2 for the Multiscale Characterisation Facility. Publisher Copyright: © 2021

PY - 2021/5/15

Y1 - 2021/5/15

N2 - The occurrence of environmental assisted cracking (EAC) has been observed in heat-treated lean duplex stainless steel via X-ray computed tomography (X-ray CT) and cross-sectional microstructure analysis. Selective corrosion of the ferrite phase occurred at the sample surface, with internal corrosion triggered by applied plastic strain. The observed cracks mainly propagated along ferrite-ferrite boundaries, with crack arrest associated with ferrite-austenite grain boundaries. Crack propagation during EAC fracture was observed, in-operando. The sudden appearance of EAC occurred due to the suppression of crack opening by ductile austenite phase. The reduced EAC resistance was attributed to hydrogen embrittlement effects.

AB - The occurrence of environmental assisted cracking (EAC) has been observed in heat-treated lean duplex stainless steel via X-ray computed tomography (X-ray CT) and cross-sectional microstructure analysis. Selective corrosion of the ferrite phase occurred at the sample surface, with internal corrosion triggered by applied plastic strain. The observed cracks mainly propagated along ferrite-ferrite boundaries, with crack arrest associated with ferrite-austenite grain boundaries. Crack propagation during EAC fracture was observed, in-operando. The sudden appearance of EAC occurred due to the suppression of crack opening by ductile austenite phase. The reduced EAC resistance was attributed to hydrogen embrittlement effects.

KW - Duplex stainless steel

KW - Enviromental assisted cracking

KW - Stress corrosion cracking

KW - X-ray computed tomography

UR - http://www.scopus.com/inward/record.url?scp=85102601738&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2021.109363

DO - 10.1016/j.corsci.2021.109363

M3 - Article

SN - 0010-938X

VL - 184

JO - Corrosion Science

JF - Corrosion Science

M1 - 109363

ER -

X-ray Tomographic Observation of Environmental Assisted Cracking in Heat-treated Lean Duplex Stainless Steel

Abstract

Keywords

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Next Generation Multi-Dimensional X-ray Imaging

Structural Evolution across multiple time and length scales

Cite this

X-ray Tomographic Observation of Environmental Assisted Cracking in Heat-treated Lean Duplex Stainless Steel

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Projects

Next Generation Multi-Dimensional X-ray Imaging

Structural Evolution across multiple time and length scales

Cite this