Self-sharpening ability enhanced by torque gradient in twisted tungsten-fiber-reinforced Cu-Zn matrix composite
| Autor: | Haitao Jiang, Mingming Wan, Shiwei Tian, Wenqi Guo, Shengwei Wang, Xufei Fang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Mechanical Engineering Composite number Metals and Alloys chemistry.chemical_element 02 engineering and technology Penetration (firestop) Sharpening Tungsten Strain rate 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry Mechanics of Materials Materials Chemistry Torque Composite material 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 794:396-401 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.04.281 |
| Popis: | The self-sharpening ability is s of great importance for penetrators when penetrating the targets. In this work, we propose a novel and simple structural design of penetrator material based on tungsten-fiber-reinforced Cu-Zn matrix composite. The clusters of tungsten fibers within the matrix are twisted with different amount in the central and edge parts to create a torque gradient. The dynamic compressive behavior of the central and edge parts of the composite is studied under a high strain rate of 2000 s−1. Their yield strength reaches 2180 MPa and 1820 MPa, with a maximum true strain at fracture being 0.2 and 0.05 respectively. The tungsten fibers from the central part fracture by splitting along the direction of the fibers, while the tungsten fibers in the edge part are more easily fractured by shearing. The penetrator made of the tungsten-fiber-reinforced Cu-Zn matrix composite shows a high penetration capability and good “self-sharpening” capacity, which can be attributed to the torque gradient which induces different mechanical responses between the central and edge parts in the composite. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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