Analysis on mechanical and metallurgical characterisation of FBTIG weldments using 15CDV6 steel Online publication date: Fri, 07-Feb-2020
by P.D. Skariya; M. Satheesh; J. Edwin Raja Dhas; G. Chandrasekar
International Journal of Nano and Biomaterials (IJNBM), Vol. 8, No. 3/4, 2019
Abstract: The minimum and maximum level in welding current, speed, flow rate, torch angle and arc gap of the GTAW process is done by conducting real-time experiments. Then with the outcomes of the experiment, the further work is carried under DOE, and it includes the necessary optimisation concept. This research continues with the NN-based GWO for modelling the welding parameters. This research work presents the PFTIG and FBTIG welding with the help of optimum nano powder and optimum flux gap. Next stage of research is fabrication and it is done in square butt joint by utilising the both optimum parameters. Moreover, in the PWHT condition, both the mechanical and metallurgical characterisation of FBTIG weldments takes place in this paper and the strength of the fabricated butt joint is found by LSP, as it is due to the failure in the weld zone. Finally, a comparison is carried out between PWHT and the PWHT + LSP conditions in terms of mechanical properties and the residual stress measurements.
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