Al7075杂化金属基复合材料组织、力学和干滑动性能的试验研究

IF 2.2 3区 工程技术 Q2 ENGINEERING, MECHANICAL Journal of Tribology-transactions of The Asme Pub Date : 2023-11-07 DOI:10.1115/1.4064020
Bhagwan Singh Lovevanshi, P. K. Soni, Savita Dixit
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引用次数: 0

摘要

摘要本研究旨在合成可持续增强与合成增强相结合的混杂Al7075金属基复合材料。采用超声换能器,采用两级搅拌铸造法合成复合材料。制备的样品经过机械加工和抛光,以进行机械、摩擦学和微观结构表征。采用光学显微镜和元素映射场发射扫描电镜对复合材料的微观组织进行了分析。显微组织检查显示增强颗粒均匀分散在整个基体中。与铸态Al7075合金相比,加入增强剂后,复合材料的抗压强度和显微硬度均有所提高,其中一个样品(B3样品)的硬度最高,分别为569.172 MPa和178.86 HV。对复合材料试样的摩擦学试验表明,随着增强剂含量的增加,复合材料的磨损率提高。在所有制备的复合材料样品中,B3样品的耐磨性最高。通过FESEM分析,在试样的磨损表面观察到磨损碎片、沟槽、微裂纹和小凹坑。
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Experimental investigations on the development of hybrid metal matrix composite of Al7075 on microstructural, mechanical, and dry sliding aspects
Abstract This research work aims to synthesis hybrid Al7075 metal matrix composite reinforced with sustainable and synthetic reinforcement. With the employment of an ultrasonic transducer, two stage stir-casting is used to synthesis composite materials. The prepared samples were machined and polished for mechanical, tribological, and microstructural characterization. Optical microscopy and Field emission scanning electron microscopy with elemental mapping were used to analyses the microstructure of the composite material. The microstructural examination revealed the homogeneous dispersion of reinforcement particles throughout the matrix. With the incorporation of reinforcement, the synthesized composite's compressive strength and micro-hardness were both increased and highest values are found as to be 569.172 MPa and 178.86 HV respectively in one of the sample (B3 sample) as compared to as-cast Al7075 alloy. Tribological examination of composites samples shows that wear rate enhances with increase in content of reinforcement. Wear resistance of sample B3 is highest among all prepared composite samples. Wear debris, grooves, micro-cracks, and small pits were observed on the worn out surfaces of the samples by FESEM analysis.
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来源期刊
Journal of Tribology-transactions of The Asme
Journal of Tribology-transactions of The Asme 工程技术-工程:机械
CiteScore
4.20
自引率
12.00%
发文量
117
审稿时长
4.1 months
期刊介绍: The Journal of Tribology publishes over 100 outstanding technical articles of permanent interest to the tribology community annually and attracts articles by tribologists from around the world. The journal features a mix of experimental, numerical, and theoretical articles dealing with all aspects of the field. In addition to being of interest to engineers and other scientists doing research in the field, the Journal is also of great importance to engineers who design or use mechanical components such as bearings, gears, seals, magnetic recording heads and disks, or prosthetic joints, or who are involved with manufacturing processes. Scope: Friction and wear; Fluid film lubrication; Elastohydrodynamic lubrication; Surface properties and characterization; Contact mechanics; Magnetic recordings; Tribological systems; Seals; Bearing design and technology; Gears; Metalworking; Lubricants; Artificial joints
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