日本金属学会誌

J. Japan Inst. Metals, Vol. 57, No. 11 (1993),
pp. 1339-1345

Tensile Strength of Titanium Joint Brazed with Aluminum

Kunimasa Takeshita and Kazuhiko Matsui

Department of Mechanical Engineering, Faculty of Engineering, Fukui University, Fukui

Abstract:

Titanium was brazed with aluminum by varying the filler metal thickness and brazing time in order to change the microstructure of the joint. The layer of intermetallic compound Al3Ti, the thickness of which increases proportionately with the increase in square root of brazing time, is formed at the interface between filler and base metals.
The aluminum layer thickness of 25 μm affords the joint of highest tensile strength, the value of which is 250~ 280 MPa. The growth of Al3Ti layer thicker than 10 μm causes the drop in tensile strength of joint.

A finite element analysis considering various fracture criteria is also carried out. The experimental results is discussed in comparison with the results of calculation.


(Received June 2, 1993)

Keywords:

brazing, titanium, joint strength, tensile strength, microstructure, finite element analysis


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