Laser cladding of Y powder on pure aluminium surface
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1.
Material Science and Technology College, Huazhong University of Science and Technology, Wuhan 430074, China
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Received Date:
2007-06-11
Accepted Date:
2007-11-08
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Abstract
In order to improve the surface properties of aluminum,the Al-Y alloy coating was fabricated by laser cladding directly melting the preplaced Y powder on substrate.With optimum process parameters,the coating layer with good metallurgical bonding performance was formed,and the grain size in cladding layer was smaller than the substrate.The microstructure characteristics of coating layer were studied by using metallogenetic microscope,energy disperse spectroscopy,X-ray diffraction and micro-hardness analysis.The results showed that the surface modified layer consisted of some inter-metallic compound phase,such as YAl3,Y4Al2O9.The micro-hardness of the coating ranging from 43HV0.2 to 58HV0.2,was 50%~60% higher than that of the substrate,ranging from 30HV0.2 to 40HV0.2.The highest hardness was obtained in the top of the coating.It can be concluded that the surface properties of aluminum can be improved by laser cladding Y powers.
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References
|
[1]
|
LIU Y,MAZUMDER J,SHIBATA K.Microstructure and properties of laser-clad Ni alloy FP-5 on A1 alloy AA333[J].Metallurgical and Materials Transactions,1994,B25(3):425-434. |
|
[2]
|
WONG T T,LIANG G Y,HE B L,et al.Wear resistance of laser-clad Ni-Cr-B-Si alloy on aluminium alloy[J].Journal of Materials Processing Technology,2000,10(3):142-146. |
|
[3]
|
LIANG G Y,SU J Y.The microstructure and tribological characteristics of laser-clad Ni-Cr-Al coatings on aluminium alloy[J].Materials Science and Engineering,2000,29(4):207-212. |
|
[4]
|
DUBOURG L,HLAWKA F,CORNET A,et al.Study of aluminium-copper-iron alloys:application for laser cladding[J].Surface and Coatings Technology,2002,20(2):329-332. |
|
[5]
|
LEE K H,NAM D H,LEE S H,et al.Hardness and wear resistance of Zr-based bulk metallic glass/Ti surface composites fabricated by high-energy electron beam irradiation[J].Surface and Coatings Technology,2006,201(3/4):1620-1628. |
|
[6]
|
TAN W,LIU W J,JIA J H.Research on laser cladding Fe-C-Si-B[J].Heat Treatment of Metals,2000(1):15-17(in Chinese). |
|
[7]
|
WANG J H,YI D Q,LU B,et al.Effect of yttrium on microstructure and properties of 2618 aluminum alloy[J].Journal of the Chinese Rare Earth Society,2002,20(2):150-153(in Chinese). |
|
[8]
|
LI H Zh,ZHANG X M,CHEN M A,et al.Effect of yttrium on as-cast microstructure of 2519 aluminum alloy[J].Journal of Central South University of Technoulgy,2005,36(4):546-549(in Chinese). |
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