Study of Titanium Brazing with Al-Ti-Al Clad Metal Sheet

Abstract:

The results of a study of commercial pure (C P) titanium brazing with Al - Ti - Al clad metal sheet are presented. The clad metal sheet has been produced by a proprietary roll bonding process. Both surfaces of the clad metal sheet are coated with an Al alloy brazing layer to a thickness of 0. 1 mm; the central sheet is C P titanium with thickness of 0. 4 mm. The clad metal sheet has been used as a substitute for monometallic Al alloy brazing foil in the braze bonding of titanium honeycomb structures; its use makes the brazing process simply and homogenizes the brazing bonding. The shear strength, macro - and microstructure of the brazed bond are investigated. The shear strength values of the joint welds with different brazing sheets are compared. The results show that the clad metal sheet braze bonded structure has a sufficiently high shear strength, more than 76 MPa.Correspondent: Luo Guozhen, Professor, Northwest institute for Nonferrous Metal Research, Xi'an 710016, P. R, China, Tel:[phone]