Bharath V, Auradi V, Kumar G B Veeresh, Nagaral Madeva, Chavali Murthy, Helal Mahmoud, Sami Rokayya, Aljuraide N I, Hu Jong Wan, Galal Ahmed M
Department of Mechanical Engineering, Sri Venkateshwara College of Engineering, Bengaluru 562157, Karnataka, India.
Siddaganga Institute of Technology, Visvesvaraya Technological University, Tumakuru 572104, Karnataka, India.
Materials (Basel). 2022 Jun 15;15(12):4244. doi: 10.3390/ma15124244.
The paper focused on an experimental study on the microstructural, mechanical, and wear characteristics of 15 wt.% alumina (AlO) particulates with an average particle size of 20 µm, reinforced in Al2014 alloy matrix composite as-cast and heat-treated samples. The metal matrix composite (MMC)samples were produced via a novel two-stage stir-casting technique. The fabricated composite samples were subjected to evaluate hardness, tensile strength, fatigue behavior and wear properties for both as cast and T6 heat-treated test samples. The Al2014 alloy and Al2014-15 wt.% AlO MMCs were in solution for 1 h at a temperature of 525 °C, quenched instantly in cold water, and then artificially aged for 10 h at a temperature of 175 °C. SEM and X-ray diffraction analyses were used to investigate the microstructure and dispersion of the reinforced AlO particles in the composite and the base alloy Al2014. The obtained results indicated that the hardness, tensile and fatigue strength and wear resistance increased when an amount of AlO particles was added, compared to the as-cast Al2014 alloy and it was observed that after subjecting the same composite samples to heat treatment, there was further enhancement in the mechanical and wear properties in the Al2014 matrix alloy and Al2014-15 wt.% AlO composite samples.
该论文聚焦于一项实验研究，研究对象是平均粒径为20 µm的15 wt.%氧化铝（AlO）颗粒增强Al2014合金基复合材料铸态和热处理样品的微观结构、力学性能及磨损特性。金属基复合材料（MMC）样品通过一种新型的两步搅拌铸造技术制备。对制备的复合材料样品进行评估，以测定铸态和T6热处理测试样品的硬度、拉伸强度、疲劳行为及磨损性能。将Al2014合金和Al2014-15 wt.% AlO MMC在525 °C温度下固溶1 h，立即在冷水中淬火，然后在175 °C温度下人工时效10 h。利用扫描电子显微镜（SEM）和X射线衍射分析来研究增强的AlO颗粒在复合材料及基体合金Al2014中的微观结构和分散情况。所得结果表明，与铸态Al2014合金相比，添加一定量的AlO颗粒后，硬度、拉伸强度、疲劳强度及耐磨性均有所提高，并且观察到，对相同的复合材料样品进行热处理后，Al2014基体合金和Al2014-15 wt.% AlO复合材料样品的力学性能和磨损性能进一步增强。
