Composition: Cu-20%Zn.

Processing: Hot extrusion and cold drawing. Annealing (600ºC - 1 h).

Etching: 90 s immersion FeCl₃ in alcoholic solution.

This is the same alloy as X31 plus annealing at 600ºC for 1 h. This treatment recrystallizes the material, resulting in new strain-free grains that are equiaxial and with straight twins. Similar to other materials in this collection, grains show different tonality depending on the amount of reflected light.  

Cu-Zn diagram

This work is licensed under a Creative Commons Attribution-NonCommercpial-ShareAlike 4.0 International