Novel method for in situ damage monitoring during ultrasonic fatigue testing by the advanced acoustic emission technique. (January 2021)

• Record Type: Journal Article
• Authors: Seleznev, M.; Weidner, A.; Biermann, H.; Vinogradov, A.
• Is Part Of: International journal of fatigue. Volume 142(2021)
• Publication Date: 2021-01
• Subjects: High frequency testing -- High cycle fatigue -- Acoustic emission -- Aluminium alloys -- Fatigue test methods; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2020.105918
• Languages: English
• ISSNs: 0142-1123

Abstract

Graphical abstract: Highlights: AE reliably determines fatigue damage in situ during USFT. Resonance-related noise in AE can be removed using adaptive STFT filtering. AE events/energy strongly correlate with the stages of fatigue damage. Proposed method is more efficient and robust than resonance-based ones. Abstract: Ultrasonic fatigue testing (USFT) is an effective method for the rapid characterisation of the high cycle fatigue properties of structural materials. However, the process of initiation and progression of fatigue damage remains uncertain in this way of testing due to the limitations of existing measuring techniques. The acoustic emission (AE) method was developed in the present work to pave a new way to monitor the fatigue process during USFT. The proposed new methodology revealed the AE activity related to fatigue damage, allowing to distinguish between surface and internal fatigue crack initiation and to follow the development of fatigue damage.