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Microstructure and Mechanical Properties of CNT-Reinforced AZ91D Composites Fabricated by Ultrasonic Processing

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Acta Metallurgica Sinica (English Letters) Aims and scope

Abstract

Carbon nanotube (CNT)-reinforced AZ91D alloy composite was fabricated by ultrasonic processing. The microstructure and mechanical properties of the CNTs/AZ91D composites were investigated. Obvious grain refinement was achieved with the addition of 0.5 wt% CNTs. The SEM observation indicated that CNTs were distributed near the grain boundary or around the inter-grain β-Mg17Al12 phase. No evident reaction product was found at the interface between CNTs and AZ91D matrix. Compared to the monolithic AZ91D alloy, the yield strength, ultimate tensile strength, and elongation of the 0.5 wt% CNTs/AZ91D composite were improved significantly. However, the poor interface bonding between CNTs and AZ91D matrix restricted further improvement in mechanical properties.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (No. 51274184). Thanks also go to Qianqian Jin for his help on the TEM work.

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Authors and Affiliations

  1. Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang, 110016, China

    Fu-Ze Zhao, Xiao-Hui Feng & Yuan-Sheng Yang

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  1. Fu-Ze Zhao
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  2. Xiao-Hui Feng
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  3. Yuan-Sheng Yang
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Correspondence to Yuan-Sheng Yang.

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Zhao, FZ., Feng, XH. & Yang, YS. Microstructure and Mechanical Properties of CNT-Reinforced AZ91D Composites Fabricated by Ultrasonic Processing. Acta Metall. Sin. (Engl. Lett.) 29, 652–660 (2016). https://doi.org/10.1007/s40195-016-0438-6

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  • DOI: https://doi.org/10.1007/s40195-016-0438-6

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