Assessment of Stress Corrosion Cracking Resistance of Activated Tungsten Inert Gas-Welded Duplex Stainless Steel Joints

被引：23

作者：

Alwin, B. ^{[1
]}

Lakshminarayanan, A. K. ^{[1
]}

Vasudevan, M. ^{[2
]}

Vasantharaja, P. ^{[2
]}

机构：

[1] SSN Coll Engn, Dept Mech Engn, Chennai 603110, Tamil Nadu, India

[2] IGCAR, Adv Welding Proc & Modelling Sect, Kalpakkam 603102, Tamil Nadu, India

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2017年 / 26卷 / 12期

关键词：

activated tungsten inert gas welding; duplex stainless steel; microstructure; stress corrosion cracking; WELDING EXPERIMENTAL-INVESTIGATIONS; RESIDUAL-STRESSES; TIG; MICROSTRUCTURE; BEHAVIOR; EVOLUTION; ZONES; LASER;

D O I：

10.1007/s11665-017-3057-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The stress corrosion cracking behavior of duplex stainless steel (DSS) weld joint largely depends on the ferrite-austenite phase microstructure balance. This phase balance is decided by the welding process used, heat input, welding conditions and the weld metal chemistry. In this investigation, the influence of activated tungsten inert gas (ATIG) and tungsten inert gas (TIG) welding processes on the stress corrosion cracking (SCC) resistance of DSS joints was evaluated and compared. Boiling magnesium chloride (45 wt.%) environment maintained at 155 A degrees C was used. The microstructure and ferrite content of different weld zones are correlated with the outcome of sustained load, SCC test. Irrespective of the welding processes used, SCC resistance of weld joints was inferior to that of the base metal. However, ATIG weld joint exhibited superior resistance to SCC than the TIG weld joint. The crack initiation and final failure were in the weld metal for the ATIG weld joint; they were in the heat-affected zone for the TIG weld joint.

引用

页码：5825 / 5836

页数：12

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