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Interface Characteristics and Mechanical Properties of the Vacuum-Brazed Joint of Titanium-Steel Having a Silver-Based Brazing Alloy

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Abstract

The lap joint of a commercially pure titanium plate (CP Ti) to a low-carbon steel plate was produced with a vacuum-brazed furnace using a silver-based filler alloy at different temperatures and lap widths in order to investigate the effects of such brazing parameters on the joint strength and structure. It was found that the shear strength of brazed joints depends strongly on the lap width. Furthermore, we have discovered that the shear strength of the joints increases as the lap width decreases. The maximum shear strength of the joints, 54 MPa, was obtained when they were brazed at 850 °C for 15 minutes. Our observations indicate that intermetallic compound layers of CuTi and Cu2Ti were formed at the interface of the brazed area. An increase in the brazing temperature led to increased growth of these layers. Shear tests show that the fracture path occurred mainly at the CuTi layer, because this layer is hard and brittle.

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  1. JEOL is a trademark of Japan Electron Optics Ltd., Tokyo.

  2. LECO is a trademark of LECO Corporation, St. Joseph, MI.

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Acknowledgment

The authors gratefully acknowledge the financial support from the Alexander von Humboldt Foundation (AvH), Federal Republic of Germany.

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Authors and Affiliations

  1. Institute of Materials Engineering, Faculty of Mechanical Engineering, University of Dortmund, Dortmund, 44227, Germany

    A. Elrefaey (Postdoctoral Fellow) & W. Tillmann (Head)

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  1. A. Elrefaey
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  2. W. Tillmann
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Correspondence to A. Elrefaey.

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Manuscript submitted January 29, 2007.

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Elrefaey, A., Tillmann, W. Interface Characteristics and Mechanical Properties of the Vacuum-Brazed Joint of Titanium-Steel Having a Silver-Based Brazing Alloy. Metall Mater Trans A 38, 2956–2962 (2007). https://doi.org/10.1007/s11661-007-9357-5

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  • DOI: https://doi.org/10.1007/s11661-007-9357-5

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