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arXiv · 1904.02975

The driving force governing room temperature grain coarsening in thin gold films

Oleksandr Glushko·Megan J. Cordill
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Abstract

Strong room-temperature grain coarsening in gold films on polyimide induced by cyclic uniaxial mechanical strain is demonstrated. Detailed electron backscatter diffraction analysis revealed that, in contrast to the predictions of shear-coupled grain boundary migration model, the grain coarsening is isotropic and coarsened grains do not exhibit any specific crystallographic orientations or misorientations to the neighboring grains. It is shown that a thermodynamic model where the driving force appears due to the difference in yield stresses between the grains with different sizes provides an adequate explanation of the experimental data.

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Oleksandr Glushko, Megan J. Cordill. 2019-04-05. The driving force governing room temperature grain coarsening in thin gold films. https://doi.org/10.1016/j.scriptamat.2016.11.012

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