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Influence of Stir Flow on Joint Quality During Friction Stir Lap Al-to-Cu Welding

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Friction Stir Welding and Processing IX

Part of the book series: The Minerals, Metals & Materials Series ((MMMS))

Abstract

Discontinuity free interface region of Al-to-Cu lap joints are required for high mechanical strength and low electrical resistance. While discontinuity free Al-to-Cu lap joints are difficult to produce using fusion welding, reviewing the literature, there is insufficient information on how such joints can be made by friction stir lap welding (FSLW). We will first briefly explain how material flow can cause voids, cavities or cracks during FSLW. Then, FSLW experiments are conducted using a tool design coupled with an appropriate positioning so that void-cavity free joints can be obtained. It has been found that speed conditions that cause insufficient downward flow also have resulted in insufficient formation of the interface layer thus in lack of joint. However, conditions that cause excessive downward flow also cause the intermetallic layer to crack. The balance of a mildly downward flow and a moderate growth of the interface layer without cracking will be demonstrated.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Auckland University of Technology, Auckland, New Zealand

    D. Parningotan, Z. W. Chen, A. Hilton & T. Pasang

  2. National Aluminium Ltd, Auckland, New Zealand

    M. Tarrant

Authors
  1. D. Parningotan
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  2. M. Tarrant
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  3. Z. W. Chen
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  4. A. Hilton
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  5. T. Pasang
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Corresponding author

Correspondence to D. Parningotan .

Editor information

Editors and Affiliations

  1. Brigham Young University , Provo, Utah, USA

    Yuri Hovanski

  2. Denton, Texas, USA

    Rajiv Mishra

  3. Tohoku University , Sendai, Japan

    Yutaka Sato

  4. Pacific Northwest National Laboratory , Richland, Washington, USA

    Piyush Upadhyay

  5. University of Wisconsin Green Bay , Green Bay, Wisconsin, USA

    David Yan

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© 2017 The Minerals, Metals & Materials Society

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Parningotan, D., Tarrant, M., Chen, Z.W., Hilton, A., Pasang, T. (2017). Influence of Stir Flow on Joint Quality During Friction Stir Lap Al-to-Cu Welding. In: Hovanski, Y., Mishra, R., Sato, Y., Upadhyay, P., Yan, D. (eds) Friction Stir Welding and Processing IX. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-52383-5_17

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