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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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Acta Metallurgica Sinica (English Letters) Aims and scope

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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Acknowledgements

This work was financially supported by the 111 Project (No. BP0719007). The authors also appreciate the assistance from the Analytical & Testing Center of Northwestern Polytechnical University for TEM observation.

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Authors and Affiliations

  1. School of Aeronautics, Northwestern Polytechnical University, Xi’an, 710000, China

    Minjie Wang & Jianghua Shen

  2. Shaanxi Key Laboratory of Impact Dynamic and Its Engineering Application, Xi’an, 710000, China

    Jianghua Shen

  3. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710000, China

    Biao Chen

  4. Joining and Welding Research Institute, Osaka University, 11-1 Mihogaoka, Osaka, 567-0047, Japan

    Umeda Junko & Katsuyoshi Kondoh

  5. School of Civil Aviation, Northwestern Polytechnical University, Xi’an, 710000, China

    Yulong Li

  6. Joint International Research Laboratory of Impact Dynamics and Its Engineering Applications, Xi’an, 710000, China

    Yulong Li

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  1. Minjie Wang
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  2. Jianghua Shen
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  3. Biao Chen
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  4. Umeda Junko
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  5. Katsuyoshi Kondoh
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  6. Yulong Li
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Correspondence to Jianghua Shen or Yulong Li.

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Wang, M., Shen, J., Chen, B. et al. Effect of CNTs on Activation Volume and Mobile Dislocation Exhaustion Rate of CNTs/Al under Compression Loading. Acta Metall. Sin. (Engl. Lett.) 36, 127–132 (2023). https://doi.org/10.1007/s40195-022-01463-x

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  • DOI: https://doi.org/10.1007/s40195-022-01463-x

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