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Brazeability of the 6061-T6 aluminum alloy with Al-Si-20Cu-based filler metals

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Abstract

The bond strength of the 6061-T6 aluminum alloy brazed with Al-12Si, Al-9.6Si-20Cu, and Al-7Si-20Cu-2Sn filer metals at a low temperature of 550°C is evaluated. The fractography of these brazements after tensile tests was observed using scanning electron microscopy (SEM). It was found that joints with good integrity can be produced with Al-7Si-20Cu-2Sn filler metal because it can be used in a temperature range of 504 to 526 °C, about 70 °C lower than the traditional Al-12Si filler metal. It was shown that joints of 6061-T6 aluminum alloy as the base metal, when brazed at 550 °C for 60 min using this new filler metal and ward, and after being subjected to a T6 treatment, possessed a high bonding strength of about 121 Mpa.

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Authors and Affiliations

  1. Institute of Materials Science and Engineering, National Taiwan University, 106, Taipei, Taiwan, Republic of China

    L. C. Tsao & T. C. Tsai

  2. Metal Industries Research & Development Center, 811, Kaohsiung, Taiwan, Republic of China

    C. S. Wu & T. H. Chuang

Authors
  1. L. C. Tsao
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  2. T. C. Tsai
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  3. C. S. Wu
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  4. T. H. Chuang
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Tsao, L.C., Tsai, T.C., Wu, C.S. et al. Brazeability of the 6061-T6 aluminum alloy with Al-Si-20Cu-based filler metals. J. of Materi Eng and Perform 10, 705–709 (2001). https://doi.org/10.1361/105994901770344584

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  • DOI: https://doi.org/10.1361/105994901770344584

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