Plasticity mechanisms in ultrafine grained freestanding aluminum thin films revealed by in-situ transmission electron microscopy nanomechanical testing

Idrissi, Hosni;Kobler, Aaron;Amin-Ahmadi, Behnam;Coulombier, Michaël;Schryvers, Dominique;et.al.
(2014) Applied Physics Letters — Vol. 104, n° 10, p. 101903 (2014)

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Abstract
In-situ bright field transmission electron microscopy (TEM) nanomechanical tensile testing and in-situ automated crystallographic orientation mapping in TEM were combined to unravel the elementary mechanisms controlling the plasticity of ultrafine grained Aluminum freestanding thin films. The characterizations demonstrate that deformation proceeds with a transition from grain rotation to intragranular dislocation glide and starvation plasticity mechanism at about 1% deformation. The grain rotation is not affected by the character of the grain boundaries. No grain growth or twinning is detected. © 2014 AIP Publishing LLC.
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Idrissi, H., Kobler, A., Amin-Ahmadi, B., Coulombier, M., Galceran, M., Raskin, J.-P., Godet, S., Kübel, C., Pardoen, T., & Schryvers, D. (2014). Plasticity mechanisms in ultrafine grained freestanding aluminum thin films revealed by in-situ transmission electron microscopy nanomechanical testing. Applied Physics Letters, 104(10), 101903. https://doi.org/10.1063/1.4868124 (Original work published 2014)