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Anomalous strain-energy-driven macroscale translation of grains during nonisothermal annealing

M. J. Higgins1, J. Kang2, G. Huang1, D. Montiel1, N. Lu1, H. Liu3, Y-F. Shen3, P. Staublin4, J.-S. Park5 et al.

J. D. Almer5, P. Kenesei5, P. G. Sanders4, R. M. Suter3, K. Thornton1, and A. J. Shahani1,*

  • 1Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48019, USA
  • 2Department of Chemical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA
  • 3Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
  • 4Department of Materials Science & Engineering, Michigan Technological University, Houghton, Michigan 49931-1295, USA
  • 5X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, USA

  • *Corresponding author: shahani@umich.edu
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Phys. Rev. Materials 5, L070401 – Published 21 July, 2021

DOI: https://doi.org/10.1103/PhysRevMaterials.5.L070401

Abstract

We report a mode of grain growth, involving the macroscopic translation of grain centers during nonisothermal annealing. Through synchrotron high-energy x-ray diffraction microscopy, we find dissolution of semicoherent precipitates generates dislocations, thereby raising the stored strain energy within grains. The subsequent evolution of grains shows unexpected grain translations over length scales of 10–100 μm. Phase-field simulations reveal that such translations are not uncommon in strain-energy-driven grain growth, wherein different regions of a grain may grow and shrink simultaneously.

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Phys. Rev. Materials 5, L070401– Published 21 July, 2021
  • Received 20 November 2020
  • Revised 27 May 2021
  • Accepted 2 July 2021
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