Authors : Siva Sitthipong, Prawit Towatana, Aumnuay Sitticharoenchai, Prawit Bibithkosolvongse and Prapas Muangjunburee
Abstract: This research aimed to investigate the fatigue life of surface welding, by using MIG-MAG welding process which the standard AWS A5.29/ASME IIC SFA-5.29 X111-T5-K4 and AWS A5.20/ASME SFA-5.20 E71T-1CH8/T-9M-D flux-cored wires were used. The method of this investigation consists of four steps: prepare specimens by using the C-Channel SCM 440 alloy steels, weld the specimens in the flat position, form the specimens into shapes by surface welding and find the fatigue strength of each specimen by using the rotating beam fatigue testing machine which complies with ASTM E739-91 standard. The result indicated that at 517 MPa fatigue stress, the specimen X111-T5-K4 gives the fatigue life of 97,896 cycles and its fatigue strength is approximately two times higher than that of the specimen E71T-1CH8/T-9M-D. The result of this research will be used as the preliminary information for evaluating the appropriate selection of welding wire and welding repair process that will be used in the maintenance program of cores in propeller shafts of the cut-stern Kolek, the local fishing boats of fishermen at the Coast of Songkhla Lake’s community.
Siva Sitthipong, Prawit Towatana, Aumnuay Sitticharoenchai, Prawit Bibithkosolvongse and Prapas Muangjunburee, 2016. Fatigue Life Estimates of Surface Welding X111-T5-K4 and E71T-1CH8/T-9M-D Flux Core Wire. Journal of Engineering and Applied Sciences, 11: 1623-1627.