Microstructure and mechanical characteristics of gradient structured Cu and Cu alloys processed by surface mechanical attrition treatment

7th International Conference on Nanomaterials by Severe Plastic Deformation

Hu, X.Z.^1 ; Cheng, L.P.^1 ; Chen, H.L.^1 ; Yin, Z.^1 ; Zhang, Z.^1 ; Shu, B.P.^1 ; Gong, Y.L.^1 ; Zhu, X.K.^1

Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, YUNNAN

650093, China^1

关键词: Al-Zn alloy;    Cryogenic temperatures;    Gradient structure;    Mechanical characteristics;    Processing time;    Stacking fault energies;    Strength and ductilities;    Surface mechanical attrition treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/194/1/012050/pdf
DOI  :  10.1088/1757-899X/194/1/012050

来源: IOP

【 摘 要 】

Cu-Al-Zn alloys with different stacking fault energy (SFE) were processed by surface mechanical attrition treatment (SMAT) at cryogenic temperature (CT), mechanical properties of gradient structured Cu-Al-Zn alloys were investigated in this study. Al and Zn content in alloys, which result in the decrease of SFE, can contribute to the increase in strength. Cu-4.5wt%Al-14.3wt%Zn alloy with the lower SFE shows that the strength increased, the ductility did not decrease significantly with increasing processing time, and the strength can be improved by a thicker gradient structure (GS) layer. The better combination of strength and ductility was achieved in Cu-4.5wt%Al-14.3wt%Zn alloy with lower SFE.