Abstract
Brazability of aluminum T-joint (AA 1100) was evaluated by a fillet formation test in vacuum. The crosssection fillet leg length ratio LV/LH (LV: vertical leg length, LH: horizontal leg length) was used for evaluating the brazability, where the ratio approaches unity under a good brazing condition. A sound fillet can be achieved at the melting temperature range of filler alloys. LV/LH reaches a plateau beyond this temperature by isothermal solidification which starts at a fillet edge. Filler alloys containing fine silicon particles are preferable to ensure succesful fillet shape. Iron up to 1.4% in Al-10%Si filler alloy has no influence on the brazability.
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