Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading

Minjie Wang; Jianghua Shen; Biao Chen; Umeda Junko; Katsuyoshi Kondoh; Yulong Li

doi:10.1007/s40195-022-01463-x

Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading

Minjie Wang, Jianghua Shen, Biao Chen, Umeda Junko, Katsuyoshi Kondoh, Yulong Li

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

1 Scopus citations

Abstract

In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile dislocations in carbon nanotubes/aluminum (CNTs/Al) composites. The results reveal that, with the addition of CNTs, the strain rate sensitivity of CNTs/Al increased. Meanwhile, a smaller V^* of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior, which was related to the tendency of short ranges order formation during plastic deformation. The incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity, leading to a lower mobile dislocation exhaustion rate.

Original language	English
Pages (from-to)	127-132
Number of pages	6
Journal	Acta Metallurgica Sinica (English Letters)
Volume	36
Issue number	1
DOIs	https://doi.org/10.1007/s40195-022-01463-x
State	Published - Jan 2023

Keywords

Activation volume
Carbon nanotubes
Dislocations exhaustion
Metal matrix composites
Strain rate sensitivity

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title = "Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading",

abstract = "In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile dislocations in carbon nanotubes/aluminum (CNTs/Al) composites. The results reveal that, with the addition of CNTs, the strain rate sensitivity of CNTs/Al increased. Meanwhile, a smaller V* of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior, which was related to the tendency of short ranges order formation during plastic deformation. The incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity, leading to a lower mobile dislocation exhaustion rate.",

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author = "Minjie Wang and Jianghua Shen and Biao Chen and Umeda Junko and Katsuyoshi Kondoh and Yulong Li",

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T1 - Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading

AU - Wang, Minjie

AU - Shen, Jianghua

AU - Chen, Biao

AU - Junko, Umeda

AU - Kondoh, Katsuyoshi

AU - Li, Yulong

PY - 2023/1

Y1 - 2023/1

N2 - In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile dislocations in carbon nanotubes/aluminum (CNTs/Al) composites. The results reveal that, with the addition of CNTs, the strain rate sensitivity of CNTs/Al increased. Meanwhile, a smaller V* of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior, which was related to the tendency of short ranges order formation during plastic deformation. The incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity, leading to a lower mobile dislocation exhaustion rate.

AB - In this study, stress relaxation compression tests were performed to investigate the strain rate sensitivity, activation volume and mobile dislocations in carbon nanotubes/aluminum (CNTs/Al) composites. The results reveal that, with the addition of CNTs, the strain rate sensitivity of CNTs/Al increased. Meanwhile, a smaller V* of CNTs/Al compared with pure Al was attributed mainly to the CNT-Al interfaces and partly to the increased forest dislocations cutting activities in grain interior, which was related to the tendency of short ranges order formation during plastic deformation. The incorporation of CNTs also improved the dislocation storage capability and reduced the dislocation velocity, leading to a lower mobile dislocation exhaustion rate.

KW - Activation volume

KW - Carbon nanotubes

KW - Dislocations exhaustion

KW - Metal matrix composites

KW - Strain rate sensitivity

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Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading

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