JETI Admin2
Abstract
Wear refers to material loss from a solid surface due to its interaction with the environment. It is generally undesirable in machine applications. A wear-testing machine is crucial for effective quality control, good manufacturing practices, and compliance with standards. Therefore, this project developed a pin-on-disc wear testing machine for tribological wear tests. This was achieved through an in-depth literature review of existing wear testing machines; their designs, operational principles, and shortcomings. A comprehensive engineering design and fabrication of a pin-on-disc wear testing machine was then carried out with a construction cost of N428,000.00. The machine was tested and performance evaluation was carried out to assess the wear resistance of nickel aluminium bronze (NAB) with 0% and 8% tin contents following ASTM G99-23 standard. The results revealed that the wear of the specimen increases with the sliding distance and load for all the NAB alloys but, stability is achieved quickly with 8% tin content due to strain hardening. The wear rate reduced from 4 × 10-8 kg/Nm and 3 × 10-8 kg/Nm at a normal load of 1.6 kg with the addition of 8% tin to the NAB alloy. Thus, the addition of tin to NAB alloy improved the wear resistance of the NAB alloy. Implementing this locally produced wear testing machine is an invaluable tool for students, researchers, and quality control professionals.
References
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