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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Microstructure Characterization and Performance Evaluation on AA7075 Metal Matrix Composites Using RSM Technique
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Microstructure Characterization and Performance Evaluation on AA7075 Metal Matrix Composites Using RSM Technique

机译：RSM技术AA7075金属基复合材料的微观结构表征及性能评价

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摘要

Ceramic particles-reinforced casted aluminium matrix composites are extensively used in aircraft and in the manufacturing of automobile components due to its excellent properties such as light weight, high strength and increased hardness. In this present research work, conventional liquid metallurgy method has been adopted to fabricate the AA7075/BN-reinforced metal matrix composites. The boron nitride ceramic powder is added with different wt% such as (0, 4 & 8). The distribution of reinforcement particles in the matrix material is identified through scanning electron microscopy. Drilling experiments are performed on fabricated composites through vertical CNC drilling machine using fully carbide drill bit and by modifying the process parameters such as spindle speed, feed and point of angle. Subsequently by varying the cutting tool angle (118°, 108° & 98°), drilling experiment is conducted. Mill tool dynamometer is used to find out the thrust force while drilling. Response surface methodology is used to optimize the output responses of thrust force and surface roughness effects from drilled metal matrix composites. The setting of experimental parameters is made with L27 Box–Behnken design factors and is performed with four factor three level. This investigation has shown that feed and point of angle are major influencing factors affecting the thrust force and surface roughness. Also, the tool wear, chip morphology and hardness of the fabricated composite material were examined.
机译：陶瓷颗粒增强铸造铝基质复合材料在飞机中广泛使用，并且由于其优异的性能，例如轻质，高强度和增加的硬度而导致汽车部件的制造。在本研究工作中，已经采用常规液体冶金方法制造AA7075 / BN增强金属基复合材料。氮化硼陶瓷粉末加入不同的wt％，例如（0,4和8）。通过扫描电子显微镜鉴定基质材料中增强颗粒的分布。通过使用完全碳化物钻头的垂直数控钻孔机和通过修改过程参数，例如主轴速度，进给和角度，进行钻井实验。随后通过改变切削工具角度（118°，108°＆98°），进行钻井实验。铣削刀具测功机用于在钻孔时找出推力力。响应面方法用于优化钻孔金属基复合材料的推力和表面粗糙度效应的输出响应。实验参数的设置采用L27 Box-Behnken设计因子进行，并进行了四个因素三级进行。该研究表明，饲料和角度是影响推力和表面粗糙度的主要影响因素。而且，检查了制造的复合材料的工具磨损，芯片形态和硬度。

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