Correlation of Stacking Fault Energy with Deformation Mechanism in Cu-(2, 20)Zn Alloys


Copper-zinc alloys with different zinc contents contain different stacking fault energies (SFE). The influence of SFE on the deformation mechanism during surface mechanical attrition treatment was studied in this work. Research results indicate that the deformation mechanism directly correlated with the SFE in Cu-Zn alloys. Deformation twinning plays a paramount role during original deformation in Cu-20Zn (19 mJ/m2). However, for Cu-2Zn alloy with low-medium SFE (38 mJ/m2), the deformation mechanism is dominated by the dislocation slipping. Microbands are the predominant microstructural features in large strain and high strain rate regions for both Cu-Zn alloys in the present study. They are likely to be formed by the splitting of the high-density dislocation walls.


Materials Science and Engineering

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This work is supported by the National Natural Science Foundation of China [grant number 52071227]; Key Scientific Research Project in Shanxi Province [grant number 20181101014 and 201805D121003].

Keywords and Phrases

Copper-zinc Alloy; Microbands; Stacking Fault Energy; Surface Mechanical Attrition Treatment; Twins

International Standard Serial Number (ISSN)

1743-2847; 0267-0836

Document Type

Article - Journal

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Publication Date

01 Jan 2022