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Quote HistoryQuoted:
You have posted on here before (several years ago) some new technique that permits 7075 to be welded. Something about TIG electrodes being inoculated with some other substance - carbides?
I can't remember.
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I got a sample of those special rods, and had some test coupons welded up. Also used the common 6061 filler (5631?).
No immediate difference in strength or ductility between the two.
I went ahead and had some trigger and FCG holes welded up on some Armalite pattern AR10 lowers I messed up. I think I used the magic rods on one, and the regular crap on the other. Welded fine, but I don't have access to my materials testing lab any more, so.....no micrographs or grain samples.
I still have some of these sample 'magic filler rods' that supposedly allow one to weld 7071-T6, if anybody wants a couple. I hounded that company for over a year to get the sample. Be warned, they're Chinese, so who know what the hell they actually sent.
Metal-Li was the company, they're vacant from the web now.
This was the article that led me to them. The prof in the article connected me.
https://newatlas.com/welding-aa7075-aluminum-alloy/58449/
Edit, I found them, they're still in business
7075 welding rods