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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Multiwalled Carbon Nanotubes on Elevated Temperature Tensile and Wear Behavior of Al2024 Matrix Composites Fabricated by Stir Casting and Hot Extrusion
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Effect of Multiwalled Carbon Nanotubes on Elevated Temperature Tensile and Wear Behavior of Al2024 Matrix Composites Fabricated by Stir Casting and Hot Extrusion

机译：多壁碳纳米管对搅拌浇铸和热挤压制造的Al2024基质复合材料高温拉伸和磨损行为的影响

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摘要

In this study, aluminum alloy matrix composites reinforced with MWCNT particles by 0.5 wt.% were fabricated by a new developed technique, consisting of semi-powder metallurgy and stir casting processes. Then, hot extrusion process was applied to the composite materials. Phase analysis and microstructure investigations were performed for the as-cast and extruded samples. Hardness test was conducted, and tensile tests were applied at room, 150 and 250 degrees C. The tribological performances of unreinforced alloy and MWCNT-reinforced composite were examined at room, 150 and 250 degrees C as well. The results showed that hardness of base aluminum alloy was improved. The peaks belonging to the MWCNT were detected by x-ray diffraction (XRD) analysis. The incorporation of MWCNT presents strengthening effect on the mechanical properties at all test temperatures. The wear rate generally decreased with the addition of MWCNT for all test conditions. Extrusion process had a positive effect to enhance wear and hardness behavior. Abrasive, adhesive, oxidative and thermal wear mechanisms were observed by scanning electron microscope.
机译：在该研究中，用MWCNT颗粒加强0.5重量％的铝合金基质复合材料通过新的开发技术制造，由半粉末冶金和搅拌铸造工艺组成。然后，将热挤出方法应用于复合材料。对浇铸和挤出样品进行相分析和微观结构研究。进行硬度试验，并在室温下施加拉伸试验，150和250℃。在室内，150和250摄氏度下，检查未原始合金和MWCNT加强复合材料的摩擦学性能。结果表明，基础铝合金的硬度得到改善。属于MWCNT的峰被X射线衍射（XRD）分析检测。 MWCNT的掺入具有对所有测试温度的力学性能的强化作用。随着所有测试条件的增加MWNT，磨损率通常降低。挤出过程具有增强磨损和硬度行为的积极效果。通过扫描电子显微镜观察磨料，粘合剂，氧化和热磨损机构。

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