Journal
27TH INTERNATIONAL CONFERENCE ON METALLURGY AND MATERIALS (METAL 2018)
Volume -, Issue -, Pages 1351-1357Publisher
TANGER LTD
Keywords
Al-Mn-Zr alloy; twin-roll casting; central segregation; Kirkendall effect; X-ray computed tomography
Funding
- K-Project for non-destructive testing and tomography plus (ZPT+)
- COMET program of FFG
- federal government of Upper Austria
- project multimodal and in-situ characterization of inhomogeneous materials (MiCi)
- European Regional Development Fund (EFRE)
- [7AMB17AT046]
- [CZ 14/2017]
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Twin-roll casting allows production of sheets and strips with required thickness without subsequent homogenization or hot rolling and therefore has a high potential for industrial applications. One of the drawbacks of this method is a formation of inhomogeneous structure with central segregation. Sheet prepared from 3003 aluminum alloy with 1 wt.% Mn, 0.2 wt.% Fe, 0.5 wt.% Si, 0.2 wt.% Cu and small addition of Zr (0.2 wt.%) and Cr (0.1 wt.%) was studied by X-ray computed tomography. Segregations in the material form as manganese, iron and silicon rich channels spread in the rolling direction. The material annealed at 450 degrees C exhibits diffusion of alloying elements from segregations into their surroundings and formation of voids or a material with lower density in the center of segregation channels due to Kirkendall effect.
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