Behavior of 316L stainless steel containing corrosion pits under cyclic loading

Muntasir Hashim; Farnoosh Farhad; David Smythe-Boyle; Robert Akid; Xiang Zhang; Philip J. Withers

doi:10.1002/maco.201810744

Behavior of 316L stainless steel containing corrosion pits under cyclic loading

Muntasir Hashim, Farnoosh Farhad, David Smythe-Boyle, Robert Akid, Xiang Zhang, Philip J. Withers

Mechanical and Construction Engineering Department

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

12 Citations (Scopus)

Abstract

The environmental performance of 316L grade stainless steel, in the form of tensile specimens containing a single corrosion pit with various aspect ratios, under cyclic loading in aerated chloride solutions is investigated in this study. Results from environmental tests were compared and contrasted with those obtained using finite element analysis (FEA). Fractography of the failed specimens obtained from experiments revealed that fatigue crack initiation took place at the base of the shallow pit. The crack initiation shifted towards the shoulder and the mouth of the pit for pits of increasing depth. This process is well predicted by FEA, as the strain contour maps show that strain is the highest around the centric strip of the pit. However, for shallow pits, local strain is uniformly distributed around that strip but begins to concentrate more towards the shoulder and the mouth region for increasingly deep pits.

Original language	English
Pages (from-to)	2009-2019
Number of pages	11
Journal	Materials and Corrosion
Volume	70
Issue number	11
Early online date	21 Jun 2019
DOIs	https://doi.org/10.1002/maco.201810744
Publication status	Published - 1 Nov 2019

Keywords

316L stainless steel
Stress Corrosion Cracking (SCC)
corrosion pits
fatigue
pit-to-crack transition

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10.1002/maco.201810744

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title = "Behavior of 316L stainless steel containing corrosion pits under cyclic loading",

abstract = "The environmental performance of 316L grade stainless steel, in the form of tensile specimens containing a single corrosion pit with various aspect ratios, under cyclic loading in aerated chloride solutions is investigated in this study. Results from environmental tests were compared and contrasted with those obtained using finite element analysis (FEA). Fractography of the failed specimens obtained from experiments revealed that fatigue crack initiation took place at the base of the shallow pit. The crack initiation shifted towards the shoulder and the mouth of the pit for pits of increasing depth. This process is well predicted by FEA, as the strain contour maps show that strain is the highest around the centric strip of the pit. However, for shallow pits, local strain is uniformly distributed around that strip but begins to concentrate more towards the shoulder and the mouth region for increasingly deep pits.",

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T1 - Behavior of 316L stainless steel containing corrosion pits under cyclic loading

AU - Hashim, Muntasir

AU - Farhad, Farnoosh

AU - Smythe-Boyle, David

AU - Akid, Robert

AU - Zhang, Xiang

AU - Withers, Philip J.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - The environmental performance of 316L grade stainless steel, in the form of tensile specimens containing a single corrosion pit with various aspect ratios, under cyclic loading in aerated chloride solutions is investigated in this study. Results from environmental tests were compared and contrasted with those obtained using finite element analysis (FEA). Fractography of the failed specimens obtained from experiments revealed that fatigue crack initiation took place at the base of the shallow pit. The crack initiation shifted towards the shoulder and the mouth of the pit for pits of increasing depth. This process is well predicted by FEA, as the strain contour maps show that strain is the highest around the centric strip of the pit. However, for shallow pits, local strain is uniformly distributed around that strip but begins to concentrate more towards the shoulder and the mouth region for increasingly deep pits.

AB - The environmental performance of 316L grade stainless steel, in the form of tensile specimens containing a single corrosion pit with various aspect ratios, under cyclic loading in aerated chloride solutions is investigated in this study. Results from environmental tests were compared and contrasted with those obtained using finite element analysis (FEA). Fractography of the failed specimens obtained from experiments revealed that fatigue crack initiation took place at the base of the shallow pit. The crack initiation shifted towards the shoulder and the mouth of the pit for pits of increasing depth. This process is well predicted by FEA, as the strain contour maps show that strain is the highest around the centric strip of the pit. However, for shallow pits, local strain is uniformly distributed around that strip but begins to concentrate more towards the shoulder and the mouth region for increasingly deep pits.

KW - 316L stainless steel

KW - Stress Corrosion Cracking (SCC)

KW - corrosion pits

KW - fatigue

KW - pit-to-crack transition

U2 - 10.1002/maco.201810744

DO - 10.1002/maco.201810744

M3 - Article

SN - 0947-5117

VL - 70

SP - 2009

EP - 2019

JO - Materials and Corrosion

JF - Materials and Corrosion

IS - 11

ER -

Behavior of 316L stainless steel containing corrosion pits under cyclic loading

Abstract

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