Effect of metastable pitting on stress corrosion cracking in 2205 duplex stainless steel welded joints

被引：0
作者：
Wang, Dengyun [1 ,2 ]
Ye, Wenhui [1 ,2 ]
Zhang, Houwei [1 ,2 ]
Zheng, Qing [1 ,2 ]
Su, Hang [3 ,4 ]
Fu, Anqing [3 ,4 ]
Xu, Lining [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, State Key Lab Nucl Power Safety Technol & Equipmen, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing Adv Innovat Ctr Mat Genome Engn, Corros & Protect Ctr, Beijing 100083, Peoples R China
[3] CNPC, State Key Lab Performance & Struct Safety Petr Tub, Tubular Goods Res Inst, Xian 710077, Peoples R China
[4] Key Lab Petr Tubular Goods & Equipment Qual Safety, Xian 710077, Peoples R China
来源：
CORROSION ENGINEERING SCIENCE AND TECHNOLOGY | 2024年
基金：
中国国家自然科学基金;
关键词：
duplex stainless steel; metastable pitting; welding; stress corrosion cracking; HEAT-AFFECTED ZONE; PIPELINE STEEL; ELECTROCHEMICAL-BEHAVIOR; MICROSTRUCTURE; EVOLUTION; PH; MORPHOLOGIES; TEMPERATURE; RESISTANCE; HYDROGEN;
D O I：
10.1177/1478422X241298112
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The behaviour of metastable pitting and its effect on stress corrosion cracking (SCC) in 2205 duplex stainless steel (DSS) welded joints were investigated through microstructure characterisation, immersion experiments, electrochemical experiments and slow strain rate tensile (SSRT) experiments. The study revealed that the corrosion in the heat-affected zone (HAZ) and weld metal (WM) increased with longer immersion time due to the environment and welding thermal cycle. The majority of the metastable pitting occurred at inclusions in the ferrite phase and ferrite (alpha)/austenite (gamma) interface. Metastable pitting can increase the DSS SCC susceptibility, with cracks typically initiating at the bottom of pits in the ferrite phase and propagating in the direction of slip bands as either transgranular-stress corrosion cracking (TGSCC) and intergranular-stress corrosion cracking (IGSCC).
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页数：16
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