The Heterogeneity of Composition and Microstructure in Cast Large Sized 3104 Alloy Slab

Abstract:

Heterogeneity of composition and microstructure in cast large sized 3104 aluminium alloy slab were studied using AES-ICP, OM, SEM, etc. The results show that the cooling rate on the cross section of 3104 slab is different, macro-segregation is found in the different section in the slab .The content of Ti decreases gradually from the surface to about 1/4 thickness of the slab, then increases rapidly to the center of slab; other elements content increases gradually from the surface to the about 1/4 thickness and then decreases rapidly to the center; the grain size on the surface area is fine, and the grain size at the center is coarse , segregation of Mg is found within the grains; great amount compound is found to be of presence on the grain boundary, with chemical compositions of Al 87（FeMn）13 and Al83（FeMn）12Si5; The compound size at the surface area is comparatively smaller, and coarser at the centre of slab.

• Periodical: Applied Mechanics and Materials (Volumes 217-219)
• Pages: 349-353
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.217-219.349
• Online since: November 2012
• Authors: Rui Yin Huang, Zhi Min Yin, Yuan Zhi Zhu
• Keywords: 3104 Alloy, Composition, Heterogeneity, Microstructure, Slab

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