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

Research output: Contribution to journal › Article › peer-review

145 Scopus citations

Abstract

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.

Original language	English
Article number	241917
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	86
Issue number	24
DOIs	https://doi.org/10.1063/1.1946899
State	Published - 13 Jun 2005
Externally published	Yes

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title = "Activation volume and density of mobile dislocations in plastically deforming nanocrystalline Ni",

abstract = "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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Y1 - 2005/6/13

N2 - 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.

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.

UR - https://www.scopus.com/pages/publications/21344448664

U2 - 10.1063/1.1946899

DO - 10.1063/1.1946899

M3 - 文章

AN - SCOPUS:21344448664

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JO - Applied Physics Letters

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ER -

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

Abstract

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