Aluminum Brazing Filler Metals for Making Aluminum to Titanium Joints in a Vacuum(Physics, Process, Instrument & Measurement)
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A spread test on Ti-base metal and a clearance filling test on Al/Ti joint were performed under vacuum condition to investigate the appropriate composition of aluminum filler metals. The spread area on Ti-base metal depended on the surface area of titanium in a brazing furnace due to an effective gettering action of titanium. Magnesium bearing brazing sheets were also effective getter materials. Al-10Si-Mg alloy was the most suitable filler metal for vacuum brazing of Al/Ti joints, and it made sound fillets at 600℃. Al-10〜12.5Cu-5〜8Sn and Al-20Ag-10Cu filler metals were also applicable at brazing temperatures of 600〜620℃. The joint strength is however, only a half of that of the Al-10Si-Mg filler metals.
- Transactions of JWRI
Transactions of JWRI 19 (1), 39-44, 1990-06