Abstract:This present investigation explore the microstructural properties of SDSS grade SAF2507 weldments produced by constant current GTAW and constant current GTAW with superimposed high frequency (HF) current. The macro, microstructural examination and mechanical characterization were performed. From the results, it was found that, the superimposition of high-frequency current on the welding current results in constriction of the arc during constant current GTAW with superimposed HF current. The superimposed HF cur… Show more
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