期刊
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
卷 43, 期 3, 页码 558-567出版社
WILEY
DOI: 10.1111/ffe.13140
关键词
aluminum alloy; internal short crack growth; fatigue test; synchrotron radiation; X-ray tomography
资金
- Agence Nationale de la Recherche [ANR-16-CE08-0039-03]
- Agence Nationale de la Recherche (ANR) [ANR-16-CE08-0039] Funding Source: Agence Nationale de la Recherche (ANR)
This work presents a new ultrasonic fatigue testing device for studying the initiation and propagation mechanisms of internal microstructurally short fatigue cracks using in situ synchrotron tomography. Its principle is described as well as the method used for automatically detecting crack initiation and its subsequent growth. To promote internal crack initiation, specimens containing internal casting defects were tested between the high cycle and very high cycle fatigue regimes (10(7)-10(9) cycles). Preliminary results show the ability of this new device to initiate an internal microstructurally short crack in a reasonable testing time and monitor its growth.
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