Understanding fatigue crack growth in aluminum alloys by in situ X-ray synchrotron tomography

被引：64
作者：
Williams, J. J. [1 ]
Yazzie, K. E. [1 ]
Padilla, E. [1 ]
Chawla, N. [1 ]
Xiao, X. [2 ]
De Carlo, F. [2 ]
机构：
[1] Arizona State Univ, Sch Engn Matter Transport & Energy, Tempe, AZ 85287 USA
[2] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2013年 / 57卷
关键词：
Fatigue striation; X-ray tomography; Fatigue crack growth; Aluminum alloy; METAL-MATRIX COMPOSITE; 3-DIMENSIONAL CHARACTERIZATION; MICROSTRUCTURE VISUALIZATION; MODEL; COALESCENCE; POROSITY; DEFORMATION; NUCLEATION; BEHAVIOR;
D O I：
10.1016/j.ijfatigue.2012.06.009
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
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.
引用
收藏
页码：79 / 85
页数：7
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