Keywords: TIG Weld low magnification.jpg Experimental TIG weld of type 6061 aluminium plate 4mm thick 200 peak amperes AC 65 electrode negative 10 pulses/second at 50 pulse duty cycle 5 amperes maintenance current between pulses welded under argon gas with filler rod showing weld bead characteristic AC TIG etch and unaffected metal surface Photographed via Wild M5Z microscope and Konica-Minolta X1 digital camera by W S Yerazunis Image scale approximate 2005-12-27 own assumed Dr Crash~commonswiki Etching microfabrication Gas tungsten arc welding Arc welding Welds |