Al-Ga 系合金のぜい化の温度依存性

概要

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Embrittlement of Al-Ga alloys, containing upto 25wt%Ga, was investigated by the tensile tests at various temperatures, optical microscope and SEM observation methods. The results obtained are as follows. (1) At the range of temperature from -40℃ to 100℃, the fracture stress of pure Al and Al-5wt%Ga alloy decreased slowly with increasing temperature, but that of alloys containing more than 10wt%Ga, even in solid solution, rapidly decreased at the range of temperature from 0℃ to 30℃. (2) The elongation of pure Al and Al-5 wt%Ga alloy increased with increasing temperature, but that of Al-10 wt%Ga alloy dropped suddenly over the range of temperature from 0℃ to 30℃, and the elongation of AL-17 wt%Ga alloy was little at the range of all over the testing temperature. (3) The fracture of pure Al and Al-5 wt%Ga alloy was of plastic type, but that of Al-10 wt%Ga alloy was an intergranular cracking. (4) The elongation of Al-10 wt%Ga alloy increased with increasing temperature above 100℃. From the above results, it is clear that the Embrittlement trough exists in the solid solution Al-Ga alloy.
社団法人日本材料学会の論文
1985-01-15