Tensile Strength of Interpulse Gas Tungsten Arc Welded Butt Joints of Nimonic Super Alloy C263
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Abstract
Nimonic C263 a nickel base super-alloy is generally used in the major components particularly in various structural and hottest sections of the gas turbine engine mainly in the combustor, exhaust sections including blades, discs, liners, and casings, etc. The interpulse gas tungsten constricted welding process is a modified controlled heat input arc welding technique. In this experiment response surface, rotatable central composite experimental design is methodically implemented for the evaluation of the impact of the key factors (i.e. interpulse current, weld current, weld speed and background current) on the tensile strength of butt-welded joints. The welded coupons are tested for tensile tests and obtained a maximum of 1152MPa. The outcome of this experimental examination and thorough optimization will be useful in choosing the most appropriate and suitable welding ranges of the above-mentioned factors for interpulse gas tungsten constricted arc welding of Nimonic superalloy C263 for automotive and aerospace applications.
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