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Phase constituents and growth mechanism of laser in situ synthesized WC reinforced composite coating with W–C–Ni system

Published online by Cambridge University Press:  12 December 2016

Da Shu ,
Zhuguo Li ,
Ke Zhang ,
Chengwu Yao ,
Dayong Li ,
Youlu Yuan  and
Zhenbang Dai
Da Shu
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Precise Forming and Knowledge Based Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; and School of Mechanical and Automotive Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, People’s Republic of China
Zhuguo Li*
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Ke Zhang
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Chengwu Yao
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Dayong Li*
Affiliation:
Institute of Precise Forming and Knowledge Based Engineering, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Youlu Yuan
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Zhenbang Dai
Affiliation:
Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
*
a) Address all correspondence to these authors. e-mail: [email protected]
b) e-mail: [email protected]
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Abstract

The in situ synthesis of nickel-based composite coating reinforced with WC particle on mild steel has been investigated. Results show a planar crystal at the interface and some relatively coarse columnar dendrites on the side of the coating near the substrate. The synthesized WC particles homogenously distribute in the coating without cracks and pores. The maximum size, mean size, and volume fraction of the WC particle is 270 µm, 35 µm, and 71%, respectively. The microhardness value of the prepared coating can be up to a maximum of 755 HV2. The synthesized WC particles generally show a unique triangular prism shape, whose evolution rule and growth mechanism are investigated by Bravais–Friedel–Donnay–Harker theory. It is deduced that crystal structure and interface energy play important role in determining the shape of WC, which evolves from sphere to hexagonal prism and finally to triangular prism.

Keywords

in situlaser claddingtriangular prismWCmorphology evolution
Type
Articles
Information
Journal of Materials Research , Volume 32 , Issue 3 , 14 February 2017 , pp. 557 - 565
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Copyright
Copyright © Materials Research Society 2016 

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Footnotes

Contributing Editor: Jürgen Eckert

References

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