A recent article in Scientific Reports explored methods to optimize the preparation of atom probe tomography (APT) specimens for low-melting solder materials (96.5 wt.% Sn–3.0 wt.% Ag–0.5 wt.% ...

I created a few cold solder joints—which happens when your solder doesn't fully melt—and the pots still work two years later. Still, it's best to practice on a cheap PCB and some spare copper ...