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

Abstract:

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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.

Info:

Periodical:

Materials Science Forum (Volumes 654-656)

Main Theme:

Edited by:

Jian-Feng Nie and Allan Morton

Pages:

922-925

DOI:

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

Citation:

R. Monzen et al., "Effect of Applied Stress on Nucleation and Growth of Precipitates in a Cu-Be-Co Alloy", Materials Science Forum, Vols. 654-656, pp. 922-925, 2010

Online since:

June 2010

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Price:

$35.00

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