期刊
METALS
卷 13, 期 7, 页码 -出版社
MDPI
DOI: 10.3390/met13071304
关键词
gradient structure; Cu-Fe alloys; corrosion behavior; heterogeneous deformation
In this paper, a composite gradient-structured Cu-10 wt.%Fe plate was prepared using the ultrasonic surface rolling process (USRP), and the microstructure evolution, mechanical properties, and corrosion behavior were investigated. The results show that USRP effectively improves the strength and corrosion resistance of the Cu-10Fe alloy. The enhanced strength is attributed to the combined effects of Hall-Petch strengthening, dislocation strengthening, and additional strengthening resulting from homogeneous deformation between the surface layer and the matrix. The improved corrosion resistance is mainly due to the refined microstructure of the surface layer after USRP, which facilitates the formation of a protective passivation film.
Immiscible Cu-Fe alloys exhibit poor corrosion resistance due to different corrosion potentials between the constituent phases, which limits their application. In this paper, a composite gradient-structured Cu-10 wt.%Fe plate was prepared via the ultrasonic surface rolling process (USRP). The microstructure evolution, mechanical properties and corrosion behavior were studied. The results demonstrate that USRP effectively enhances both the strength and corrosion resistance of the Cu-10Fe alloy. The improved strength is related to the combined effects of Hall-Petch strengthening, dislocation strengthening, and additional strengthening resulting from homogeneous deformation between the surface layer and the matrix. The enhanced corrosion resistance is primarily attributed to the refined microstructure of the surface layer after USRP, which facilitates the formation of a protective passivation film.
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