File:TIG weld etch zone closeup.jpg

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A closeup micrograph of a TIG weld etch zone on 6061 aluminium (pulsed at 200 amps peak current, 5 amps sustain current, 50% pulse duty cycle, AC, 65% electrode negative, pure argon shield gas). These intentionally suboptimal conditions produce an widened etch zone where the normal layer of aluminium oxide has been removed from the surface, leaving exposed metallic aluminium capable of being welded.

Image is approximately 10mm across the field of view; photographed with a Wild M5Z microscope and a Konica-Minolta Dimage X1 digital camera by W.S. Yerazunis.
Date 27 December 2005 (according to Exif data)
Source No machine-readable source provided. Own work assumed (based on copyright claims).
Author No machine-readable author provided. Dr. Crash~commonswiki assumed (based on copyright claims).

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current01:41, 4 January 2006Thumbnail for version as of 01:41, 4 January 20061,024 × 768 (778 KB)Dr. Crash~commonswiki (talk | contribs)A closeup micrograph of a TIG weld etch zone on 6061 aluminium (pulsed at 200 amps peak current, 5 amps sustain current, 50% pulse duty cycle, AC, 65% electrode negative, pure argon shield gas). These intentionally suboptimal conditions produce an widene

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