On the failure of surface damage to assess the hydrogen-enhanced deformation ahead of crack tip in a cyclically loaded austenitic stainless steel

Shuai Wang; Kelly E. Nygren; Akihide Nagao; Petros Sofronis; Ian M. Robertson

doi:10.1016/j.scriptamat.2019.03.010

On the failure of surface damage to assess the hydrogen-enhanced deformation ahead of crack tip in a cyclically loaded austenitic stainless steel

Shuai Wang, Kelly E. Nygren, Akihide Nagao, Petros Sofronis, Ian M. Robertson

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

Abstract

The influence of internal hydrogen on the plastic deformation ahead of a crack tip in a cyclically loaded austenitic stainless steel was determined through examination of the surface slip steps and dislocation structure. The slip steps failed to capture the totality of the sub-surface plasticity, causing the dimensions of the plastic zone generated in the presence of hydrogen to be underestimated. Regions in the hydrogen-charged steel that displayed no slip steps exhibited a similar dislocation structure to regions with slip steps in the uncharged steel. These observations are attributed to hydrogen-accelerating deformation processes and the rate of microstructure evolution.

Original language	English (US)
Pages (from-to)	102-106
Number of pages	5
Journal	Scripta Materialia
Volume	166
DOIs	https://doi.org/10.1016/j.scriptamat.2019.03.010
State	Published - Jun 2019

Keywords

316L austenitic stainless steel
Cyclic plastic zone
Fatigue
Hydrogen embrittlement
Transmission electron microscopy

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Online availability

10.1016/j.scriptamat.2019.03.010

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title = "On the failure of surface damage to assess the hydrogen-enhanced deformation ahead of crack tip in a cyclically loaded austenitic stainless steel",

abstract = "The influence of internal hydrogen on the plastic deformation ahead of a crack tip in a cyclically loaded austenitic stainless steel was determined through examination of the surface slip steps and dislocation structure. The slip steps failed to capture the totality of the sub-surface plasticity, causing the dimensions of the plastic zone generated in the presence of hydrogen to be underestimated. Regions in the hydrogen-charged steel that displayed no slip steps exhibited a similar dislocation structure to regions with slip steps in the uncharged steel. These observations are attributed to hydrogen-accelerating deformation processes and the rate of microstructure evolution.",

keywords = "316L austenitic stainless steel, Cyclic plastic zone, Fatigue, Hydrogen embrittlement, Transmission electron microscopy",

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doi = "10.1016/j.scriptamat.2019.03.010",

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T1 - On the failure of surface damage to assess the hydrogen-enhanced deformation ahead of crack tip in a cyclically loaded austenitic stainless steel

AU - Wang, Shuai

AU - Nygren, Kelly E.

AU - Nagao, Akihide

AU - Sofronis, Petros

AU - Robertson, Ian M.

PY - 2019/6

Y1 - 2019/6

N2 - The influence of internal hydrogen on the plastic deformation ahead of a crack tip in a cyclically loaded austenitic stainless steel was determined through examination of the surface slip steps and dislocation structure. The slip steps failed to capture the totality of the sub-surface plasticity, causing the dimensions of the plastic zone generated in the presence of hydrogen to be underestimated. Regions in the hydrogen-charged steel that displayed no slip steps exhibited a similar dislocation structure to regions with slip steps in the uncharged steel. These observations are attributed to hydrogen-accelerating deformation processes and the rate of microstructure evolution.

AB - The influence of internal hydrogen on the plastic deformation ahead of a crack tip in a cyclically loaded austenitic stainless steel was determined through examination of the surface slip steps and dislocation structure. The slip steps failed to capture the totality of the sub-surface plasticity, causing the dimensions of the plastic zone generated in the presence of hydrogen to be underestimated. Regions in the hydrogen-charged steel that displayed no slip steps exhibited a similar dislocation structure to regions with slip steps in the uncharged steel. These observations are attributed to hydrogen-accelerating deformation processes and the rate of microstructure evolution.

KW - 316L austenitic stainless steel

KW - Cyclic plastic zone

KW - Fatigue

KW - Hydrogen embrittlement

KW - Transmission electron microscopy

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JO - Scripta Materialia

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On the failure of surface damage to assess the hydrogen-enhanced deformation ahead of crack tip in a cyclically loaded austenitic stainless steel

Abstract

Keywords

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