Study on Diagnosis and Evaluation of Wear State under Tribological Phenomena with Electric Current Using AE Technique

2015 Fiscal Year Final Research Report

• Project/Area Number: 25820036
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Saitama Institute of Technology
• Principal Investigator: Hase Alan 埼玉工業大学, 工学部, 講師 (10552953)
• Co-Investigator(Renkei-kenkyūsha): MISHINA Hiroshi 千葉大学, 大学院工学研究科, 教授 (50142641)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: トライボロジー / アコースティックエミッション / 可視化 / 損耗 / 放電 / 溶融 / 状態監視 / 集電材料

Outline of Final Research Achievements

In this study, the evaluation of tribological characteristics for current collector materials, e.g., an electric railway and a motor brush, by using an acoustic emission (AE) technique was attempted by an in situ observation experiment and a long distance sliding friction experiment. As an experimental result, it was found that the difference in main phenomenon (discharge or melt) can be identified from the difference in the frequency spectrum of the AE signal waveform. The frequency analysis of the AE signals detected at various deformation and fracture phenomena was conducted in order to apply the AE technique to the identification and the evaluation of phenomena between the sliding surfaces. A correlation map between the wear mode and the AE signal at abrasion under electric current which was created from the results up to now was proposed.

Free Research Field

トライボロジー，アコースティックエミッション，精密加工