|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Miniaturised Ultrasonic Fatigue Testing
||Jicheng Gong, Arutyun Arutyunyan, Isaac Cabrera, Angus J. Wilkinson
|On-Site Speaker (Planned)
||Angus J. Wilkinson
We have developed a methodology for testing small volumes of materials to failure in the (very) high cycle fatigue regime. At the micro-scale (300 nm to ~5 Ám wide) cantilevers are cut by focused ion beam into the surface a bulk sample block, while at the meso-scale (50-200 Ám wide) we have used laser micro machining to cut cantilever structures into thin metallic foils. In both cases cyclic deflections are excited in the cantilevers through vibration of the sample block/foil using a high power ~20 kHz ultrasonic generator. The samples are monitored in situ using optical microscopy, while intermittent SEM and EBSD analysis can be undertaken across the entire sample.
Results from testing campaigns on Ti alloys (commercially pure, and Ti-6Al-4V), Ni-based superalloy IN718, and stainless steel 304L will be presented.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)