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Influence of Al addition on microstructure and properties of Cu–Fe-based coatings by laser induction hybrid rapid cladding

Published online by Cambridge University Press:  09 April 2014

Shengfeng Zhou ,
Xiaoqin Dai ,
Zheng Xiong ,
Chao Wu ,
Tianyou Zhang  and
Zezhong Zhang
Shengfeng Zhou*
Affiliation:
Department of Computer Culture Basis, School of Information Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, People's Republic of China
Xiaoqin Dai
Affiliation:
Department of Computer Culture Basis, School of Information Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, People's Republic of China
Zheng Xiong
Affiliation:
Department of Chemistry and Materials, School of Science, Naval University of Engineering, Wuhan, Hubei 430033, People's Republic of China
Chao Wu
Affiliation:
Department of Metal Corrosion and Protection, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, People's Republic of China
Tianyou Zhang
Affiliation:
Department of Metal Corrosion and Protection, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, People's Republic of China
Zezhong Zhang
Affiliation:
Department of Metal Corrosion and Protection, School of Material Science and Engineering, Nanchang Hangkong University, Nanchang, Jiangxi 330063, People's Republic of China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

To establish the relationships between composition, microstructure, and properties, the influence of Al addition on microstructure and properties of Cu–Fe-based coatings by laser induction hybrid rapid cladding was studied. With increasing Al content, the main diffraction peaks of ε-Cu phase are weakened but those of α-Fe phase are strengthened, the size of Fe-rich particles generally increases but the dendrite arm spacing is further reduced, and the number of Cu-rich grains precipitated inside the Fe-rich particles increases but the size reduces. Moreover, when the amount of Al is increased, the improvement in electrochemical resistance is attributed to large amounts of fine Cu-rich grains precipitated inside the Fe-rich particles, which results in large anode–small cathode effect. The microhardness also increases with Al content and the microhardness of Cu53.5Fe36Al10C0.5 coating is approximately 2.4 times higher than that of copper alloy substrate.

Keywords

alloycoatingmicrostructure
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 7 , 14 April 2014 , pp. 865 - 873
Copyright
Copyright © Materials Research Society 2014 

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References

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