Cu-5.5Al-4.5Zn, Cu-1.9Al-23.9Zn and Cu-1.1Al-2.6Zn (in wt%) alloys with different stacking fault energy (SFE) were prepared by means of surface mechanical attrition treatment (SMAT). Subsequently, gradient structure (GS) was generated in the Cu-Al-Zn alloys, which significantly improved the mechanical properties of the alloys. The influence of SFE on mechanical properties was systematically investigated. The strength of the annealed Cu-Al-Zn alloys increased with the decrease of SFE. The uniform elongation (UE) did not decline with increasing SMAT time in the Cu-5.5Al-4.5Zn alloy. Our results indicate an exceptional combination of high strength and ductility in the Cu-5.5Al-4.5Zn (lowest SFE) alloy processed by SMAT.

通过表面机械磨损处理（SMAT）制备了具有不同堆垛层错能（SFE）的Cu-5.5Al-4.5Zn，Cu-1.9Al-23.9Zn和Cu-1.1Al-2.6Zn（重量％）合金。随后，在Cu-Al-Zn合金中产生了梯度结构（GS），从而显着改善了合金的机械性能。系统地研究了SFE对机械性能的影响。退火后的Cu-Al-Zn合金的强度随着SFE的降低而增加。在Cu-5.5Al-4.5Zn合金中，均匀伸长率（UE）不会随着SMAT时间的增加而下降。我们的结果表明，通过SMAT处理的Cu-5.5Al-4.5Zn（最低SFE）合金具有高强度和延展性的出色组合。