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Damage behavior of tungsten fiber-reinforced copper matrix composite after high-speed impact

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Abstract

Wf/Cu82Al10Fe4Ni4 composite was fabricated by means of infiltration casting. By the microstructure observation of the composite with the aid of scanning electron microscopy (SEM) and transmission electron microscopy (TEM), it can be found that there are (Fe, Ni), AlFe, Al3Ni, and Cu3Al precipitated phases existing in the matrix alloy. By two-stage light gas gun, Wf/Cu82Al10Fe4Ni4 composite hypervelocity projectile into concrete target test with the speed of 2.2 km·s−1 is finished. By microstructure observation, it can be found that the failure mode of Wf/Cu82Al10Fe4Ni4 composite projectile during penetration is the rapid peeling of tungsten fibers from the projectile, which makes the projectile display good self-sharpening property. Meanwhile, it can be found that microstructure morphology change of Wf/Cu82Al10Fe4Ni4 composite occurs after hypervelocity impact. The density of dislocations around the large-dimensional (Fe, Ni), AlFe, Al3Ni, and Cu3Al precipitated phases in the matrix alloy rises sharply. At the same time, there are large-dimensional deformed twins existing in local regions and stacking faults existing inside the twins.

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Acknowledgments

This study was financially supported by the Fundamental Research Funds for the Central Universities (No. DL12BB04) and the National Natural Science Foundation of China (Nos. 31200434 and 31370566).

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Authors and Affiliations

  1. College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin, 150040, China

    Zhe Wu, Chun-Mei Yang, Qian-Jun Liu & Yan Ma

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  1. Zhe Wu
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  2. Chun-Mei Yang
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Correspondence to Zhe Wu.

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Wu, Z., Yang, CM., Liu, QJ. et al. Damage behavior of tungsten fiber-reinforced copper matrix composite after high-speed impact. Rare Met. 33, 330–336 (2014). https://doi.org/10.1007/s12598-014-0309-0

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  • DOI: https://doi.org/10.1007/s12598-014-0309-0

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