Mechanisms of Mitigating Chloride-Induced Stress Corrosion Cracking of Austenitic Steels by Laser Shock Peening

被引：0

作者：

Yoo, Yongchul ^{[1
]}

Yan, Xueliang ^{[1
]}

Wang, Fei ^{[1
]}

Zhu, Qiuchi ^{[2
]}

Lu, Yongfeng ^{[2
]}

Cui, Bai ^{[1
,3
]}

机构：

[1] Univ Nebraska, Dept Mech & Mat Engn, Lincoln, NE 68588 USA

[2] Univ Nebraska, Dept Elect & Comp Engn, Lincoln, NE 68588 USA

[3] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

来源：

CORROSION | 2022年 / 78卷 / 06期

基金：

美国国家科学基金会;

关键词：

austenitic steel; laser shock peening; stress corrosion cracking; STAINLESS-STEELS; RESIDUAL-STRESSES; HYDROGEN EMBRITTLEMENT; SUSCEPTIBILITY; PREDICTION; MODEL; MICROSTRUCTURE; DEFORMATION; INITIATION; ALLOYS;

D O I：

10.5006/3990

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigates the effect of laser shock peening (LSP) on the chloride-induced stress corrosion cracking (SCC) of 304 austenitic steels. LSP can induce a high compressive residual stress to a depth of 700 mu m and plastic deformation structures of dislocations, deformation twins, and stacking faults. Constant-load SCC tests in MgCl2 solution suggested that LSP can retard the crack initiation and slow the crack growth. LSP-treated subsurface layers experience ductile fracture while the central regions exhibit intergranular SCC. The LSP-induced deformation structures may impede dislocation slips, while the LSP-induced compressive residual stress can lessen the stress intensity factor of crack tips and decrease the local stress for film rupture.

引用

页码：494 / 502

页数：9

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