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 current restricts the arc with for all intents and purposes a similar root and extended diameter. The weldment region unit considered the standard for mechanical and microstructural properties. The dominance of properties because of the association of inter pulse or HF current is described along with its related science concerned.
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