Article

Metallurgical and Materials Transactions A

, Volume 37, Issue 9, pp 2701-2714

First online:

Numerical modeling of diffusion-induced deformation

  • J. A. DantzigAffiliated withthe Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign
  • , W. J. BoettingerAffiliated withMetallurgy Division
  • , J. A. WarrenAffiliated withThermodynamics and Kinetics Group, Metallurgy Division
  • , G. B. McFaddenAffiliated withMathematical and Computation Sciences Division, Information Technology Laboratory
  • , S. R. CoriellAffiliated withthe National Institute of Standards and Technology
  • , R. F. SekerkaAffiliated withCarnegie Mellon University

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Abstract

We present a numerical approach to modeling the deformation induced by the Kirkendall effect in binary alloys. The governing equations for isothermal binary diffusion are formulated with respect to inert markers and also with respect to the volume-averaged velocity. Relations necessary to convert between the two formulations are derived. Whereas the marker formulation is the natural one in which to pose constitutive laws, the volume formulation provides certain computational advantages. We therefore compute the diffusion and deformation with respect to the volume-centered velocity and then determine the corresponding fields with respect to the markers. Several problems involving one-dimensional (1-D) diffusion couples are solved for verification, and a problem involving two-dimensional (2-D) diffusion in a lap joint is solved to illustrate the power of the method in a more complex geometry.