Intergranular Corrosion Susceptibility of Alloy 600 after Autogenous Tungsten Inert Gas and Laser Beam Welding using Electrochemical Technique
- Resource Type
- Authors
- Geogy J. Abraham; G.K. Dey; Rajan Bhambroo; V.S. Raja; Vivekanand Kain
- Source
- High Temperature Materials and Processes. 33:137-146
- Subject
- Cracking
Materials science
Resistance
Alloy
chemistry.chemical_element
Stress-Corrosion
Welding
engineering.material
Tungsten
Electrochemistry
Alloy 600
Heat-Treatment
law.invention
Grain-Boundaries
law
Sensitized Alloy-600
General Materials Science
Physical and Theoretical Chemistry
Inert gas
Austenitic Stainless-Steels
Gas tungsten arc welding
Chromium Depletion
Metallurgy
Temperature
Laser beam welding
Intergranular corrosion
Condensed Matter Physics
Chemistry
chemistry
Mechanics of Materials
Sem
Tem
engineering
Intergranular Corrosion
- Language
- ISSN
- 2191-0324
0334-6455
Intergranular corrosion and intergranular stress corrosion cracking is influenced by precipitation of chromium carbides at grain boundaries and formation of chromium depletion regions. The present study focuses on understanding the carbide precipitation and subsequent sensitization in the weldments of Alloy 600 using two different welding techniques. The effect of heat input on microstructure and IGC susceptibility was measured using electrochemical reactivation test. The SEM studies were done to evaluate the presence of chromium depleted regions. The carbide was indentified to be Cr7C3 using TEM. The laser beam weldments showed an increased resistance to IGC as compared to TIG weldments.