Movies: Mathiesen

MOVIES

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The movies that appear here have been contributed by various authors. They may be used freely for instruction and presentations as long as the work is properly attributed. They may not be redistributed, excerpted, or used in any publication without the expressed written consent of the original authors.

ragnvald mathiesen

These movies, produced by Ragnvald Mathiesen and Lars Arnberg, were obtained by in-situ X-ray video microscopy carried out at the ESRF in Grenoble, France at beam lines ID22 and ID6. For further information, please email to: Ragnvald.Mathiesen@ntnu.no

Al20Cu_equiaxed

Equiaxed dendritic growth during directional solidification parallel with gravity in Al-20wt%Cu. Imposed temperature gradient of 38 K/mm, sample velocity of 17.5 microns/s. (4.5 Mb)

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Fragmentation

Fragmentation in Al-20wt%Cu during directional solidification anti parallel with gravity. Imposed temperature gradient of 48 K/mm, and sample velocity of 25 microns/s. (7.7 & 7.8 Mb)

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Porosity

Formation of pores in Al-30wt%Cu during directional solidification parallel with gravity. Hydrogen gas bubbles are being incorporated into the eutectic. Imposed temerpature gradient of 27 K/mm, and sample velocity of 22.4microns/s. [Reference to original work: L. Arnberg and R. H. Mathiesen, JOM 59, 2007, 20-26; R. H. Mathiesen, et al, Met. Mat. Trans. B33, 2002, 613-623] (4.5 Mb)

AlSiCu eutectic solidification

Directional solidification parallel to gravity in AlSiCu eutectic alloys. The movie on the left shows an unmodified irregular eutectic. Imposed temperature gradient of 23.0 K/mm, and sample velocity of 17 microns/s

The movie on the right shows a Sr-modified irregular eutectic. Imposed temperature gradient of 18.4 K/mm, and sample velocity of 10.5 microns/s

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Settling in AlSiCu alloy

Alpha-Al and fibrous Al-Si eutectic growth in the presence of fluid flow from directional solidification parallel to gravity in a Al-9wt%Si-15wt%Cu-0.015wt%Sr alloy. Imposed temperature gradient of 45 K/mm, and sample velocity of 6.3 microns/s

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