Influence of filler metal and arc pulsation on P91 steel weldments developed by activated TIG welding and its effect on stress corrosion cracking

被引：2

作者：

Nishad, Saurabh Kumar ^{[1
]}

Dwivedi, Dheerendra Kumar ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Mech & Ind Engn, Welding Res Lab, Roorkee, India

来源：

CORROSION SCIENCE | 2024年 / 239卷

关键词：

Activated TIG; P91; steel; Stress corrosion cracking; Microstructure; Constant load test; AUSTENITIC STAINLESS-STEELS; HYDROGEN-INDUCED CRACKING; MECHANICAL-PROPERTIES; PULSED CURRENT; X70; STEEL; MICROSTRUCTURE; BEHAVIOR; SUSCEPTIBILITY; EMBRITTLEMENT; INITIATION;

D O I：

10.1016/j.corsci.2024.112415

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study examines the influence of arc pulsation and ErNiCrMo-3 filler metal on stress corrosion cracking (SCC) in P91 steel weld joints using activated tungsten inert gas (A-TIG) welding. The constant current joint without filler showed the lowest resistance to SCC, while the pulsed current joint with filler exhibited the highest SCC resistance. Arc pulsation reduced chromium carbide precipitates, enhancing microstructural refinement and crack growth thereby increasing tensile strength and SCC resistance. Filler introduced minor austenitic phases inside martensitic microstructure with reduced hydrogen content contributed to increased SCC resistance. The joint fractography among all welds revealed a complete transgranular fracture.

引用

页数：14

共 18 条

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