EXPERIMENTAL INVESTIGATION OF STRENGTH OF V & U GROOVE BUTT WELDED JOINT CARBON STEEL MATERIALS USED IN PRESSURE VESSEL BY USING GTAW & SMAW WELDING TECHNIQUES

Mechanical Engineering

Welding is an area in which technological development out match in its science base which is primarily driven by the phenomenal industrial demand for welded structure. Reliability, Reproducibility and Viability requirements are forcing Technologists to look at weld defects such as distortion, hot cracking, in a systematic and logical approach than on experimental basis. Distortion is an unwanted physical change from specifications in a fabricated structures is caused by non-uniform expansion and contraction of the weld metal during heating and cooling cycle of the welding process many factors viz., material properties, welding process and procedures adopted make accurate prediction of distortion difficult. Type of Groove was taken to analyze tensile, compressive, shear, bend and impact strength in butt weld joints. The current study aim to compare mechanical properties of A516 Gr.70 and IS 2062 E250 for different groove angle and bevel heights keeping root opening, voltage and current constant. The specimens are prepared by using V groove butt weld joints by SMAW process then compare the tensile strength. High tensile jointed material between these materials is taken for comparing of strength of U & V groove geometry. For which work gas tungsten arc welding process has been selected because TIG welding is the process of joining different materials with high quality in the presence of inert gas. Alternating current power source has been selected because of better cleaning action and due to alternating current the high heat concentration on the material can be avoided. Mechanical tests such as tensile test, impact test and hardness test have been conducted to find out the mechanical properties such as tensile strength, impact strength of HAZ.

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