Micronotches for studying growth of small cracks

被引：5
|
作者：
Wessel, W. [1 ]
Mildner, J. [2 ,3 ]
Pitz, P. [1 ]
Brueckner-Foit, A. [1 ]
Wollenhaupt, M. [2 ,3 ,4 ]
Baumert, T. [2 ,3 ]
机构：
[1] Univ Kassel, Inst Mat Engn, D-34125 Kassel, Germany
[2] Univ Kassel, Dept Phys, D-34125 Kassel, Germany
[3] Univ Kassel, CINSaT, D-34125 Kassel, Germany
[4] Carl von Ossietzky Univ Oldenburg, Dept Phys, D-26111 Oldenburg, Germany
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2015年 / 38卷 / 06期
基金：
美国国家科学基金会;
关键词：
crack initiation and propagation; fatigue crack growth; intermetallic compound; microcrack; notched specimen; METALLIC MATERIALS; CAST-ALUMINUM; FATIGUE; PROPAGATION; BEHAVIOR;
D O I：
10.1111/ffe.12275
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Well-defined starter cracks at preselected sites in the microstructures are needed for systematic investigation of the characteristic features of microstructure controlled growth of small cracks. A kinked ellipsoidal micronotch with very high notch factor at the trailing kink is proposed, which triggers controlled crack initiation along the notch contour. These micronotches can be machined by femtosecond laser ablation with virtually no heat-affected zone at the edges. Crack growth results obtained for an intermetallic -TiAl alloy are presented as an illustrative example.
引用
收藏
页码：673 / 680
页数：8
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