Fracture Mechanism of Aluminum Joint Brazed by Zn-Al Alloy

Abstract:

Zn-Al alloy microstructures were investigated, moreover, the strength and microstructures of pure aluminium brazed joint had been studied. Joint fracture mechanism was analyzed. The results indicate that the blocky microstructure in the cast 85Zn-15Al filler metal is granular and fine. Accordingly, the blocky eutectoid structure in the joint brazed by 85Zn-15Al is fine and even. Stress concentration emerges difficultly between fine blocky eutectoid structure and its surrounding structure. So the joint strength is highest. When Al content in the Zn-Al alloy exceeds 15wt.%, the blocky eutectoid structure become large in the cast filler metal and the brazed joint. The brazed joint strength decreases.

• Periodical: Advanced Materials Research (Volumes 538-541)
• Pages: 1697-1700
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.538-541.1697
• Online since: June 2012
• Authors: Man Zhang, Hai Lin Jiang, Hong Bin Xu, Yue Bin Lin
• Keywords: Aluminium Joint, Braze, Fracture Mechanism, Zn-Al Filler Metal

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