Effect of Applied Stress on Nucleation and Growth of Precipitates in a Cu-Be-Co Alloy

Ryoichi Monzen; Tadashi Terazawa; Chihiro Watanabe

doi:10.4028/www.scientific.net/MSF.654-656.922

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HomeMaterials Science ForumMaterials Science Forum Vols. 654-656Effect of Applied Stress on Nucleation and Growth...

Effect of Applied Stress on Nucleation and Growth of Precipitates in a Cu-Be-Co Alloy

Abstract:

The influence of an external stress on the nucleation and growth of disk-shaped G.P. zones has been investigated for a Cu-1.2wt%Be-0.1wt%Co alloy aged at 220 °C. A compressive stress applied in the [001] direction during aging preferentially accelerates the nucleation and growth of the G.P. zones perpendicular to the [001] axis, whereas a tensile stress does not significantly affect those of G.P. zones. The promotion of the nucleation and growth of the G.P. zones perpendicular to the compressive-stress axis can be well understood through the interaction energy between the applied stress and the misfit strains of G.P. zones. The critical diameter of the disk-shaped G.P. zone nucleus was estimated as about 1.3 nm from evaluation of the interaction energy.

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Materials Science Forum (Volumes 654-656)

Pages:

922-925

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.654-656.922

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Online since:

June 2010

Authors:

Ryoichi Monzen, Tadashi Terazawa, Chihiro Watanabe

Keywords:

Applied Stress, Critical Nucleus, Cu-Be-Co Alloy, G.P. Zone, Growth, Interaction Energy, Misfit, Nucleation

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