Microstructure and Crystallography of Zn-55Al-1.6Si Coating Spangle on Steel.

Autor: Chen, Rex, Yuen, Daniel
Předmět:
Zdroj: Metallurgical & Materials Transactions. Part A; Dec2012, Vol. 43 Issue 12, p4711-4723, 13p, 3 Color Photographs, 1 Black and White Photograph, 2 Diagrams, 3 Charts, 1 Graph
Abstrakt: In this article, the microstructures of Zn-55Al-1.6Si coating spangles on steel were examined using optical microscopy and the crystallographic orientations of the spangles analyzed using X-ray diffraction (XRD) and electron backscatter diffraction (EBSD). It was found that α-Al dendrite arms forming the spangles grew along straight lines with uniform size, uniform dendrite arm spacing, and in most sectors in directions parallel to their border lines. It was also found that (111) and (100) were the most common orientations in the coating. The likely preferred dendrite arm growth directions for the spangles having the (111) orientation were [110] or [112], whereas both [100] and [110] were possible growth directions when the spangles had (100) orientations. The [320] directions suggested in the literature were unlikely to be the growth directions in any of the spangles examined. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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