In the present work ultrasonic stir casting method is used to fabricate aluminium metal matrix nanocomposites reinforced with nano boron carbide (nB 4 C) particles with varying (0.5, 1, 1.5 and 2) weight percentages. Microhardness and nanoindentaion hardness of the nanocomposite is found to increase with increasing reinforcement content. Pin on disk apparatus is used to study the room temperature dry sliding wear behavior of fabricated composites and base alloy. Nominal contact pressures of 0.354–1.412 MPa and sliding speeds of 0.16–0.66 m s −1 are employed. Each test run is conducted for the fixed contact period of 15 min. Field emission scanning electron microscopy (FESEM) equipped with energy dispersive spectroscopy (EDS) is used to observe worn surface and wear debris to understand the undergoing wear mechanisms. It is observed that base alloy underwent mild to severe plastic deformation led oxidative delamination wear. Nanocomposites are subjected to comb...

中文翻译：

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超声搅拌铸造碳化硼增强铝纳米复合材料的干滑磨损行为

在本工作中，采用超声搅拌铸造法来制造由重量百分比变化为（0.5、1、1.5和2）的纳米碳化硼（nB 4 C）颗粒增强的铝金属基体纳米复合材料。发现纳米复合材料的显微硬度和纳米靛蓝硬度随着增强含量的增加而增加。盘上销钉用于研究复合材料和基体合金在室温下的干滑磨损行为。额定接触压力为0.354-1.412 MPa，滑动速度为0.16-0.66 ms -1。每次测试进行15分钟的固定接触时间。配备有能量色散光谱仪（EDS）的场发射扫描电子显微镜（FESEM）用于观察磨损的表面和磨损碎屑，以了解磨损机理。据观察，基础合金经历了轻微至严重的塑性变形，导致了氧化分层磨损。纳米复合材料要经受梳理。