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Updated: Jul 13, 2026

Applying Dynamic Strain on Thin Oxide Films Immobilized on a Pseudoelastic Nickel-Titanium Alloy
Published on: July 28, 2020
Kinetic model of stress evolution during coalescence and growth of polycrystalline thin films
Juan S Tello1, Allan F Bower, Eric Chason
1Division of Engineering, Brown University, Providence, Rhode Island 02912, USA. jstello@gmail.com
Abstract:
We outline a simple continuum model of the stresses that result from the coalescence and growth of islands during deposition of a polycrystalline thin film. Our model includes a detailed description of attractive forces between neighboring islands, and also accounts for mass transport along surfaces and grain boundaries. The finite element method is used to calculate the island shape changes as well as the stresses and displacements in the film during the growth process. The model reproduces several experimental observations, including the variation of stress with film thickness, the range of observed growth stresses, and the effects of deposition flux and grain boundary diffusivity on stress.
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