Activation volume and density of mobile dislocations in plastically deforming nanocrystalline Ni

Y. M. Wang; A. V. Hamza; E. Ma

doi:10.1063/1.1946899

Activation volume and density of mobile dislocations in plastically deforming nanocrystalline Ni

Y. M. Wang
, A. V. Hamza
, E. Ma

Chem./Materials Science Directorate
Johns Hopkins University

科研成果: 期刊稿件 › 文章 › 同行评审

148 引用（Scopus）

摘要

We report the analysis of repeated transients to monitor the coupled evolution of dislocation velocity and mobile dislocation density in plastically deforming nanocrystalline Ni. The stress relaxation series allowed the determination of the physical activation volume, indicating a rate-controlling mechanism different from that in coarse-grained Ni. The mobile dislocation exhaustion observed is correlated with the unusually high apparent work-hardening rate during the early stage of straining.

源语言	英语
文章编号	241917
页（从-至）	1-3
页数	3
期刊	Applied Physics Letters
卷	86
期	24
DOI	https://doi.org/10.1063/1.1946899
出版状态	已出版 - 13 6月 2005
已对外发布	是

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AB - We report the analysis of repeated transients to monitor the coupled evolution of dislocation velocity and mobile dislocation density in plastically deforming nanocrystalline Ni. The stress relaxation series allowed the determination of the physical activation volume, indicating a rate-controlling mechanism different from that in coarse-grained Ni. The mobile dislocation exhaustion observed is correlated with the unusually high apparent work-hardening rate during the early stage of straining.

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Activation volume and density of mobile dislocations in plastically deforming nanocrystalline Ni

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