Diffusion Creep during Grain Growth in Nanocrystalline Metals

Yuri Estrin; Günter Gottstein; Lasar S. Shvindlerman

doi:10.4028/www.scientific.net/MSF.467-470.1283

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HomeMaterials Science ForumMaterials Science Forum Vols. 467-470Diffusion Creep during Grain Growth in...

Diffusion Creep during Grain Growth in Nanocrystalline Metals

Abstract:

Diffusion controlled creep in nanostructured materials is considered for the case when grain growth occurs concurrently. The Nabarro-Herring and Coble mechanisms that would predict creep rate reduction are re-considered to include the effect of grain-growth induced vacancy generation. It is shown that under such conditions creep is accelerated during an initial stage of grain growth as compared to the case of constant grain size. This creep enhancement stage is followed by a period of reduced creep rate. The predicted strain rate behaviour resembles primary and secondary creep.

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Materials Science Forum (Volumes 467-470)

Pages:

1283-1288

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.467-470.1283

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Online since:

October 2004

Authors:

Yuri Estrin, Günter Gottstein, Lasar S. Shvindlerman

Keywords:

Coble Creep, Diffusion Creep, Grain Growth, Nabarro-Herring Creep, Vacancy Generation

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References

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