A study on kerf characteristics of hybrid aluminium 7075 metal matrix composites machined using abrasive water jet machining technology
A study on kerf characteristics of hybrid aluminium 7075 metal matrix composites machined using abrasive water jet machining technology
复制标题
磨料水射流加工混合铝7075金属基复合材料切缝特性研究
DOI：
10.1177/0954405416654085
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
M. Uthayakumar
中科院分区：
文献类型：
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作者：
K. Sasikumar;K. Arulshri;K. Ponappa;M. Uthayakumar
金属基复合材料很难用传统的加工方法进行加工。磨料水射流加工是一项最先进的技术，几乎可以加工所有工程材料。本文研究了添加5%、10%和15% TiC和B4C（各等量）增强的混合铝7075金属基复合材料磨料水射流加工工艺参数的优化。针对磨料水射流加工工艺参数，即水射流压力、射流移动速度和间隔距离，研究了切口顶部宽度、切口角度和表面粗糙度等切口特征。这些参数对响应的贡献通过方差分析来确定。获得了切缝特性的回归模型。研究发现，移动速度对顶切缝宽度的影响大于其他参数。水射流压力对切缝角度和表面光洁度的影响更大。还通过扫描电子显微镜分析了加工表面的微观结构。扫描电子显微镜研究揭示了混合 7075 铝金属基复合材料的塑性变形切削。 X射线衍射分析结果证明加工表面上没有截留磨粒。
Metal matrix composites are difficult to machine in traditional machining methods. Abrasive water jet machining is a state-of-the art technology which enables machining of practically all engineering materials. This article deals with the investigation on optimization of process parameters of abrasive water jet machining of hybrid aluminium 7075 metal matrix composites with 5%, 10% and 15% of TiC and B4C (equal amount of each) reinforcement. The kerf characteristics such as kerf top width, kerf angle and surface roughness were studied against the abrasive water jet machining process parameters, namely, water jet pressure, jet traverse speed and standoff distance. Contribution of these parameters on responses was determined by analysis of variance. Regression models were obtained for kerf characteristics. Contribution of traverse speed was found to be more than other parameters in affecting top kerf width. Water jet pressure influenced more in affecting kerf angle and surface finish. The microstructures of machined surfaces were also analysed by scanning electron microscopy. The scanning electron microscopy investigations exposed the plastic deformation cutting of hybrid 7075 aluminium metal matrix composite. X-ray diffraction analysis results proved the non-entrapment of abrasive particle on the machined surface.