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Welding: Solidification and microstructure

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Abstract

Parameters that control the solidification of castings also control the solidification and microstructure of welds. However, various physical processes that occur due to the interaction of the heat source with the metal during welding add a new dimension to the understanding of the weld pool solidification. Conventional theories of solidification over a broad range of conditions can be extended to understand weld pool solidification. In certain cases, because of rapid cooling rate effects, it is not unusual to observe nonequilibrium microstructures. Recent developments in the application of computational thermodynamics and kinetic models, studies on single-crystal welds, and advanced in-situ characterization techniques have led to a better understanding of weld solidification and microstructures.

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Authors and Affiliations

  1. Oak Ridge National Laboratory, USA

    S. A. David, S. S. Babu & J. M. Vitek

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  1. S. A. David
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  3. J. M. Vitek
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Editor’s Note: A hypertext-enhanced version of this article is available on-line atwww.tms.org/pubs/journals/JOM/0306/David-0306.html

For more information, contact S.A. David, Oak Ridge National Laboratory, Metals & Ceramics Division, Building 4508, MS 6095, Oak Ridge, Tennessee 37831-6095; (865) 574-4804; fax (865) 574-4928; e-mail Davidsa1@ornl.gov.

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David, S.A., Babu, S.S. & Vitek, J.M. Welding: Solidification and microstructure. JOM 55, 14–20 (2003). https://doi.org/10.1007/s11837-003-0134-7

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