TY - JOUR

T1 - The driving force governing room temperature grain coarsening in thin gold films

AU - Glushko, Oleksandr

AU - Cordill, Megan

PY - 2017

Y1 - 2017

N2 - 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.

AB - 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.

U2 - 10.1016/j.scriptamat.2016.11.012

DO - 10.1016/j.scriptamat.2016.11.012

M3 - Article

VL - 130.2017

SP - 42

EP - 45

JO - Scripta Materialia

JF - Scripta Materialia

SN - 1359-6462

IS - 15 March

ER -