Influence of martensitic phase on microcrack propagation in a ferritic-martensitic steel

被引:0
|
作者
Brueckner-Foit, Angelika [1 ]
Pitz, Pascal [1 ]
Zeismann, Frank [1 ]
Zellmer, Lisa [1 ]
机构
[1] Univ Kassel, Inst Mat Engn, D-34109 Kassel, Germany
来源
11TH INTERNATIONAL FATIGUE CONGRESS, PTS 1 AND 2 | 2014年 / 891-892卷
关键词
Microcrack; crack opening displacement; dual phase steel; X-ray tomography; digital image correlation; FATIGUE-CRACK-PROPAGATION; TOMOGRAPHY TECHNIQUE; MECHANICS;
D O I
10.4028/www.scientific.net/AMR.891-892.301
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Hard phases such as martensite regions affect micro-crack extension by blocking the plastic zone ahead of the crack tip, but also by changing the crack opening which can be taken as loading quantity for cracks. This paper deals with the measurement of crack opening for microcracks in a ferrite/martensite dual phase steel. The methods used are in-situ testing in the SEM, X-ray tomography, and digital image correlation. It was found that martensite regions affect the relative displacement of the crack phases both at the crack tip and in the crack wake.
引用
收藏
页码:301 / 306
页数:6
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