ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The reaction between solid steel and liquid Al-Zn-Si alloy leads to the formation of asolid intermetallic interfacial layer. In the case of industrial Al-43.5Zn-1.5Si coated steel strips, thethickness of the intermetallic layer is on average 1.35 μm and the kinetics of the reaction iscontrolled by the effect of Si on Al and Fe diffusivities through the solid intermetallic layer. In thispaper it is shown that the thickness of the intermetallic interfacial layer decreases as the Si contentin the liquid alloy increases. EDXS microanalysis at the interface of industrial coated steel stripsshows that the interfacial intermetallic compounds are chemically similar to those formed in thebulk of Al-43.5Zn-1.5Si liquid baths in continuous coating lines. Differential acid dissolution of thecoatings reveals that the intermetallic layer is not planar at the interface with the coating overlayand is formed by grains of different size and chemical composition. Addition of minute quantities ofTi to the Al-Zn-Si liquid alloy causes changes in the morphology of the intermetallic layer and anoverall refining of the microstructure
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.560.97.pdf
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