Dynamic Evaluation of Strength-Structure Properties by the Determination of Activation Volume and Mean Slip Distance

Abstract:

Measurements of the activation volume and mean slip distance were used in the dynamic dislocation-defect analysis to reveal the dislocation-obstacle evolution with strain. Due to the large effect of point defect mobility above 250 K on the strain rate sensitivity, fine-grained Al specimens with the grain-boundaries sealed and unsealed as vacancy sinks were tested at 300 K as the reference behaviour. The activation distance diagrams revealed that the artificially aged products in AA6111 and naturally aged extruded AA6063 can be used to examine the effect of chopping-up of particles on the ductility of the samples. Thus a means to examine strength-structure-ductility of specific products have been devised.

• Periodical: Materials Science Forum (Volumes 539-543)
• Pages: 2192-2197
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.539-543.2192
• Online since: March 2007
• Authors: Shigeo Saimoto
• Keywords: Aluminium Alloy, Dynamic Dislocation Interaction, Material Testing, Plasticity, Structure-Ductility

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