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Mass transport in a high-gradient thermal field in the course of friction stir welding and modification of the upper layer

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We analyze the mass transport in high-gradient thermal fields formed in microvolumes of the material in the course of friction stir welding (FSW) and modification of the upper layer (friction stir processing). A simplified Fe–Cr diffusion system with unidirectional thermodynamic excitations is analyzed. The character of mass transport is determined by thermal diffusion, which affects the final distribution of the concentration of diffusing elements in the friction region. The chemical potentials of the components of the process lead to phase transformations typical of the (Fe–C)–Cr ternary system. We present the results of analysis of these phenomena. The verification of solutions is realized by analyzing an example of adhesive chromium layer deposited on a matrix of S235JR and S355 low-alloyed steels. A modeled heat source in the form of laser radiation is used in the microvolumes of the analyzed friction unit.

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Authors and Affiliations

  1. Dąbrowski Military University of Technology, Warsaw, Poland

    A. Górka & D. Kocańda

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  1. A. Górka
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  2. D. Kocańda
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Correspondence to D. Kocańda.

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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 47, No. 2, pp. 93–98, March–April, 2011.

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Górka, A., Kocańda, D. Mass transport in a high-gradient thermal field in the course of friction stir welding and modification of the upper layer. Mater Sci 47, 217–223 (2011). https://doi.org/10.1007/s11003-011-9385-6

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  • DOI: https://doi.org/10.1007/s11003-011-9385-6

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