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Dynamic grain growth and particle coarsening in Al–3.5Cu

✍ Scribed by O.V. Rofman; P.S. Bate

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
1001 KB
Volume
58
Category
Article
ISSN
1359-6454

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✦ Synopsis

Grain growth and particle coarsening in Al-3.5Cu at a temperature of 450 °C has been studied. Plastic deformation of this Zenerpinned system at strain rates of 10 À3 and 10 À4 s À1 led to an increase in both the grain growth and particle coarsening rates. The results of mechanical tests and metallography, including in situ studies, showed that the material was deforming primarily by intragranular slip. The dynamic grain growth was ascribed to the geometric effect of deformation on the Zener pinning, and the rate sensitivity of the growth to the dynamic particle coarsening. The principal effect of deformation on particle coarsening was concluded to be increased diffusion due to the dislocation content.

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