Liquid Gallium Penetration along Grain Boundaries in Pure Al and Al-Based Alloys

Abstract:

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The kinetics of liquid Ga penetration along grain boundaries in pure Al, Al-Mn (50 ppm Mn) and Al-Ga alloys (with concentration 0.7, 1 and 3% mass. Ga) was studied. It was shown that crack-like channels filled by liquid Ga were formed along all grain boundaries. Their width was about 1-3 µm. Investigation of quenched state showed that in all samples, channels had grown with linear kinetics, and that the propagation rate depended on impurity concentration in alloys: 35µm/s for Al-Mn alloy, 14 µm/s for pure Al and 9±1 µm/s for Al with (0.7-3) % Ga alloys. The difference in penetration rates of pure Al and Al based alloys are discussed in terms of internal stress and mechanical properties.

Info:

Periodical:

Defect and Diffusion Forum (Volumes 237-240)

Edited by:

M. Danielewski, R. Filipek, R. Kozubski, W. Kucza, P. Zieba, Z. Zurek

Pages:

751-755

DOI:

10.4028/www.scientific.net/DDF.237-240.751

Citation:

O. Kozlova et al., "Liquid Gallium Penetration along Grain Boundaries in Pure Al and Al-Based Alloys", Defect and Diffusion Forum, Vols. 237-240, pp. 751-755, 2005

Online since:

April 2005

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Price:

$35.00

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