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 journalLetterpeer-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 languageEnglish
Pages (from-to)127-132
Number of pages6
JournalActa Metallurgica Sinica (English Letters)
Volume36
Issue number1
DOIs
StatePublished - Jan 2023

Keywords

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

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