Arc stability in TIG welding thin sheets of aluminium and its alloys

Spatial stability of arc and weld formation in welding thin sheets of AI with right‐angle different polarity pulses

“…As regards the determination of the optimum values of I s and I r , the value of I s is selected from the required extent of penetration of metal, and Ir the condition of stable arc reignition (this restricts the minimum current I r ) 4 and high-quality cathodic cleaning. In this case, the value of I s may be considerably higher than I r .…”