The mechanisms governing the activation of dislocation sources in aluminum at different strain rates

This article examines the time to activate Frank–Read sources in response to macroscopic strain rates ranging from 101s−1 to 1010s−1 in aluminium under athermal conditions. We develop analytical models of the bowing of a pinned dislocation segment as well as numerical simulations of three dimensiona...

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Veröffentlicht in:	Journal of the mechanics and physics of solids 2015-11, Vol.84, p.273-292
Hauptverfasser:	Gurrutxaga-Lerma, B., Balint, D.S., Dini, D., Sutton, A.P.
Format:	Artikel
Sprache:	eng
Schlagworte:	Activation Aluminum Dislocation dynamics Dislocation pinning Dislocations Frank–Read sources Homogeneous nucleation Mathematical analysis Mathematical models Nucleation Source activation time Strain rate Yield point
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