期刊
SCRIPTA MATERIALIA
卷 48, 期 8, 页码 991-995出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S1359-6462(02)00589-4
关键词
Mg alloys; superplasticity; denuded zone; grain boundary diffusion; grain boundary fluid flow
A new mechanism is proposed for the growth of denuded zone and superplasticity in general. This is the flow of grain boundary fluid that has a Herschel-Bulkley behavior. Such a mechanism could provide a power-law stress dependence, a threshold stress, a grain size effect and an activation energy comparable to grain boundary diffusion. (C) 2003 Published by Elsevier Science Ltd. on behalf of Acta Materialia Inc.
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