期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 57, 期 -, 页码 79-85出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2012.06.009
关键词
Fatigue striation; X-ray tomography; Fatigue crack growth; Aluminum alloy
In situ 3D X-ray synchrotron tomography of fatigue crack growth was conducted in a 7075-T6 aluminum alloy. Local measurements of da/dN were possible with the 3D data sets obtained from tomography. In situ measurements of crack opening displacement (COD) were obtained, illustrating the possibilities for quantifying fatigue crack closure. Quantitative microstructural analysis enabled an assessment of the role of brittle inclusions on fatigue crack propagation. A significant increase in preferential crack growth through the inclusions was observed. (C) 2012 Elsevier Ltd. All rights reserved.
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