Effect of Weld Pool Vibration on Fatigue Strength and Tensile Strength of Stainless Steel Butt Welded Joints by GTAW Process

Effects of simultaneous weld pool vibrations on the tensile and fatigue strength of AISI SS 304L butt joint welded joints using gas tungsten arc welding process have been studied. A set up for inducing mechanical vibrations of constant frequency and amplitude in the weld pool was designed and fabric...

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Bibliographic Details
Published inLecture notes in engineering and computer science Vol. 2235/2236; p. 721
Main Authors Gill, JS, Reddy, T Kalyan
Format Journal Article
LanguageEnglish
Published Hong Kong International Association of Engineers 04.07.2018
Subjects
Alloy solidification
Butt joints
Butt welding
Comparative studies
Crack opening displacement
Crack propagation
Crack tips
Electron microscopes
Fatigue failure
Fatigue strength
Fatigue tests
Fracture toughness
Gas tungsten arc welding
Grain refinement
Tensile strength
Welded joints
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Summary:Effects of simultaneous weld pool vibrations on the tensile and fatigue strength of AISI SS 304L butt joint welded joints using gas tungsten arc welding process have been studied. A set up for inducing mechanical vibrations of constant frequency and amplitude in the weld pool was designed and fabricated. A comparative study of the welded joints under the influence of weld pool vibrations and in conventional mode was conducted. Crack tip opening displacement (CTOD) for measuring the fracture toughness and thus indicating the fatigue behaviour, and tensile testing of the welded joints were conducted in compliance of ASTM standards. Test results showed significant improvement in the strength of the joints welded under the effect of weld pool vibrations. Microstructural studies reveal that relatively finegrained structures have been obtained in the joints which welded under the influence of weld pool vibrations. Weld pool vibrations were found to be effective and fruitful in controlling the grain refinement thereby improving the weld quality in terms of fatigue and tensile strength.
ISSN:2078-0958
2078-0966