By flamin
Date 08-04-2009 15:41
Edited 08-08-2009 15:01
When ever I find indications, I usually have the welder grind out and re-weld, as previously mentioned. More times than not, the small indications will reveal much more beneath the surface once the indication is ground out.
EDIT: I've been working on a project for the last couple of months peforming visual and preliminary PT NDE on the parts. Thus far, porosity has been a non issue, but the big issue has been crater cracks. These particular parts have intermittent fillet welds all over the place, and so far 90-95% of all the fillet welds have the crater cracks. The welds look beautiful visually, but once the penetrant is done, it changes the whole story. I guess what I am trying to say is, I think that porosity would be the least of you worries when it comes to aluminum.
Jason