Fusion welding process to join aluminum and titanium

Details Fusion welding process to join aluminum and titanium Fusion welding process to join aluminum and titanium

2009-07-06

2010-11-30

Stoner, Kiley (Department: 1793)

Metal fusion bonding

Process

With shaping

C228S171000, C228S174000, C228S262510, C228S262720, C219S054000, C219S076140, C428S544000

Reexamination Certificate

active

07841507

ABSTRACT:
The invention concerns a process for joining a first member (1) comprising an aluminum alloy to a second member (2) comprising a titanium alloy and having at least one edge with a thickness e,comprising the steps of(i) chamfering said edge of said second member into a tapered truncated shape having on a first side a first tapering angle α1,on a second side a second tapering angle α2and a minimum thickness t, wherein α1and α2are greater than or equal to zero, the sum of α1and α2is between 10° and 50° and t is between 0.05 e and 0.3 e,(ii) placing said first member and said chamfered edge of said second member (21) in an abutting relationship defining a geometry to be weld-brazed (3),(iii) heating the surface areas of said members adjacent the abutment to a temperature above the melting temperature of said aluminum alloy and below the melting temperature of said titanium alloy, in the presence of an inert gas (5) and of a filler metal (4) to obtain a weld-brazed joint.The process of the invention is particularly useful for obtaining high strength weld-brazed joints between aluminum and titanium with a high process output.

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