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Flux-free brazing of Mg-containing aluminium
alloys by means of cold spraying |
| BOBZIN Kirsten, ZHAO Lidong, ERNST Felix, RICHARDT Katharina |
| Surface Engineering Institute, RWTH Aachen University |
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Abstract In the present study, AlSi12 and AlSi10Cu4 were deposited onto Mg-containing aluminium alloys 6063 and 5754 by cold spraying. The influences of the two brazing alloys and spray parameters on coating formation were investigated. The microstructure of the coatings was characterized. Some coated samples were heat-treated at 590°C and 560°C in air to investigate the effect of the rupture of oxide scales on the diffusion of elements during heat-treatment. Some coated samples were brazed under argon atmosphere without any fluxes. The results show that AlSi12 had much better deposition behaviour than AlSi10Cu4. Due to the rupture of oxide scales, Cu and Si diffused into the substrate and a metallurgical bond formed between the brazing alloys and the substrates during heat-treatment. The coated samples could be brazed without any fluxes. Because the oxide scales prevented the formation of a metallurgical bond locally, the brazed samples had relatively low shear strengths of up to 43 MPa.
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Issue Date: 05 December 2008
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| 1 |
Miller W S, Zhuang L, Bottema J, Wittebrood A J, Smet PD, Haszler A, Vieregge A . Recentdevelopment in aluminum alloys for automotive industry.Mater Sci Eng A, 2000, 280(1): 37–49.
doi:10.1016/S0921-5093(99)00653-X
|
| 2 |
Kohlweiler W . Brazingaluminium. www.BrazeTec.de
|
| 3 |
Dykhuizen R C, Smith M F . Gas dynamic principles ofcold spray. J Therm Spray Technol 1998, 7(2): 205–212
|
| 4 |
Lima R S, Kucuk A, Berndt C C, Karthikeyan J, Kay C M, Lindemann J . Deposition efficiency, mechanical properties and coatingroughness in cold-sprayed titanium. J MaterSci Lett, 2002, 21: 1687–1689.
doi:10.1023/A:1020833011448
|
| 5 |
Morgan R, Fox P, Pattison J, Sutcliffe C, O'Neil W . Analysis of cold gas dynamicallysprayed aluminium deposits. Mater Lett, 2004, 58: 1317–1320.
doi:10.1016/j.matlet.2003.09.048
|
| 6 |
Gärtner F, Stoltenhoff T, Schmidt T, Kreye H . The cold sprayprocess and its potential for industrial applications. J Therm Spray Technol, 2006, 15(2): 223–232.
doi:10.1361/105996306X108110
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