Brazability of Aluminum using Al-Si Filler Alloys with Different Compositions and Microstructures
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Brazability of aluminum T-joint (AA 1100) was evaluated by a fillet formation test in a vacuum using Al-Si alloys with different compositions and microstructures. The crosssection fillet leg length rotio L_V/L_H (L_V: vertical leg length, L_H: horizontal leg length) was used for evaluating the brazability, where the ratio approached unity under a good brazing condition. In filler alloys with 5〜10%Si, a sound fillet could be achieved under liquidus temperature. L_V/L_H reached a plateau beyond this temperature by isothermal solidification which started at a fillet edge. Filler alloys containing fine silicon particles were preferable to ensure successful fillet shape. Iron up to 1.4% in Al-10%Si filler alloy had no influence on brazability.
- 大阪大学の論文
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