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

Olga Kozlova; Alexey Rodin; D. Podgornyi; N. Normand

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

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

Abstract:

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.

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Periodical:

Defect and Diffusion Forum (Volumes 237-240)

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751-755

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https://doi.org/10.4028/www.scientific.net/DDF.237-240.751

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Online since:

April 2005

Authors:

Olga Kozlova, Alexey Rodin, D. Podgornyi, N. Normand

Keywords:

Al-Based Alloy, Crack-Like Channel, Liquid Ga, Penetration

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