The driving force governing room temperature grain coarsening in thin gold films. (15th March 2017)

• Record Type: Journal Article
• Authors: Glushko, O.; Cordill, M.J.
• Is Part Of: Scripta materialia. Number 130(2017)
• Page Start: 42
• Page End: 45
• Publication Date: 2017-03-15
• Subjects: Grain coarsening -- Room temperature -- Driving force -- Yield stress -- Texture; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2016.11.012
• Languages: English
• ISSNs: 1359-6462

Abstract

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. Graphical abstract: