The BlueBeards wrote:
Peeve: UGs who want me to make them stuff like an Al Cu Zn Mg Fe Cr alloy.
don't they know that's difficult at best and even more so without an inert atmosphere
Ehh, today's groups were not as bad as I earlier imagined. I did say no way to trying to alloy any Li or Ti, too problematic, but I went along with any other proposed compositions.
They had to go on my faith on temps after the AL Cu were melted and I got above 900c, that any Fe, Cr, Mn adds then melted in charge, as I was not going to burn through thermocouples to prove it. I'm pretty good at just by looking at the charge light intensity and wavelength what's the temperature. Oxide formation with Mg, not bad at all. Zn is a always a bit tricky, it's all temp control, but I kept the oxides pretty low with no discernible vaporation. I'll know tomorrow morning if that's truly the case assuming no one claims they got zinc oxide poisoning today.
That's yellow eyes, flue like symptoms, and yellow skin if it's bad enough. Takes 3-14 days to clear up if you get it.
More groups for the next 2-3 weeks. It's fun really. I like getting the kids involved in this kinda stuff. Good learning experience for them.