Real-time detection of microcracks with floating giant-magnetoresistance sensor in twin-disk sliding tests. Issue 1 (2017)

• Record Type: Journal Article
• Authors: Nagato, Keisuke; Shintani, Kodai; Hamaguchi, Tetsuya; Nakao, Masayuki
• Is Part Of: CIRP annals. Volume 66:Issue 1(2017)
• Page Start: 539
• Page End: 542
• Publication Date: 2017
• Subjects: Micro structure -- Sensor -- Tribology; Production engineering -- Research -- Periodicals; 670.5
• DOI: 10.1016/j.cirp.2017.04.078
• Languages: English
• ISSNs: 0007-8506

Abstract

Abstract: In severe twin-disk sliding tests of materials for machine parts such as gears and bearings, the pitting or spalling occurring at the end of the test is considered to begin at a microcrack on the surface of the specimen. However, it is difficult to determine the timing and position of microcracks during the test. In this study, we designed and developed a monitoring system with a floating giant-magnetoresistance (GMR) sensor. An artificial microcrack and a naturally generated microcrack were simultaneously detected during a twin-disk sliding test. Furthermore, a twin-disk sliding test with a standard specimen disk was also demonstrated.