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.

中文翻译：

---

基于先进声发射技术的超声疲劳试验原位损伤监测新方法

摘要 超声疲劳试验（USFT）是一种快速表征结构材料高周疲劳性能的有效方法。然而，由于现有测量技术的局限性，疲劳损伤的开始和发展过程在这种测试方式中仍然不确定。在目前的工作中开发了声发射 (AE) 方法，为在 USFT 期间监测疲劳过程铺平了道路。提议的新方法揭示了与疲劳损伤相关的 AE 活动，允许区分表面和内部疲劳裂纹的萌生并跟踪疲劳损伤的发展。