Abstract
In the present work, tungsten inert gas (TIG) welding was carried out on stainless steel pipe joints and the heat transfer behaviour for various welding heat input was analysed. In this work austenitic stainless steel of grade 304L was used and the experiment was carried out on bead on plate and weld profile was analysed. The bead profile was obtained from the experiment and microstructure was characterized. The bead profile dimensions from the experiment were used in the calibration of heat source model during finite element heat transfer analysis. Based on the calibrated heat source model, TIG welding of stainless steel pipes was analysed. Numerical simulation was considered as conduction heat transfer analysis and weld pool convection was neglected in the model. The non-linear transient heat transfer analysis was carried out on pipes and thermal cycles at various locations were analysed.
Highlights
Welding is the most widely used, cost-effective means for joining sections of metal to produce an assembly that will perform as if cut or formed from solid material
This research was carried out to understand the heat transfer behaviour during tungsten inert gas (TIG) welding of pipes as it is widely being used in many industries
The experimentally obtained weld bead profile shows the partial penetration of bead and the weldment has austenite and ferrite microstructure
Summary
Welding is the most widely used, cost-effective means for joining sections of metal to produce an assembly that will perform as if cut or formed from solid material. The authors [1] attempt to list the recent developments in the area of arc welding heat transfer simulation. Fusion welding modelling is a broad area where a number of research groups were spending their efforts to get solutions for both research and industrial problems. Starting from fundamentals of arc physics, heat transfer, microstructure models, thermal stress, and modern techniques like pattern recognition comes into picture while considering the complete solution of welding-related problems. These areas are developing almost independently and there are only few efforts to couple them together as computational welding mechanics
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