The role of recalcitrant grain boundaries in cleavage cracking in polycrystals

被引：8
|
作者：
Qiao, Y [1 ]
机构：
[1] Univ Akron, Dept Civil Engn, Akron, OH 44325 USA
来源：
JOURNAL OF MATERIALS SCIENCE | 2005年 / 40卷 / 18期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1007/s10853-005-1909-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Recalcitrant grain boundaries offer an important resistance to cleavage crack advance through crack trapping. In this article, this effect is studied based on an energy analysis. It is found that the critical energy release rate is dominated by a single parameter, Q, that collects together factors such as work of separation, grain size, and crack length. For short cracks, the crack trapping effect leads to an increase in fracture resistance by 20-30%. For long cracks, the crack trapping effect is negligible.
引用
收藏
页码：4819 / 4825
页数：7
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