What is the best etchant to reveal grain structure in WAAM (TIG-based) samples with alternating 4047 and ZK61 layers, especially at the interface?

I have fabricated a multi-material WAAM (TIG-based) sample with alternating layers of 4047 aluminum alloy and ZK61 magnesium alloy. The sample is polished, and I now need to reveal the grain...

07 July 2025 4,725 1 View