Fracture Analysis of Layered Cast Iron

被引：0

作者：

Petraitis, G. ^{[1
]}

Leonavicius, M. ^{[1
]}

Stupak, S. ^{[1
]}

机构：

[1] Vilnius Gediminas Tech Univ, LT-10223 Vilnius, Lithuania

来源：

MECHANIKA 2009 - PROCEEDINGS OF THE 14TH INTERNATIONAL CONFERENCE | 2009年

关键词：

cast iron; dross; microstructure; cyclic loading; crack; fracture; threshold stress intensity factor; HIGH-CYCLE FATIGUE;

D O I：

暂无

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The paper analyses fractures of seminatural specimens from layered cast iron, under gigacycle loading regime, when the number of cycles exceeds N > 10(7) cycles. Cyclic loading (pure bending r = -0.62) performed according to programme started from loads below threshold stress intensity factor. Crack propagation in dross layer and main metal was investigated by optical and electronic means. Fatigue cracks sources were found not only on specimens surfaces but also in areas beneath surface at nonhomogeneous formations surroundings. It was determined by investigation that dross-type microstructure distorts crack propagation front, secondary cracks appear on the surface. Also other factors influencing crack propagation have been analysed.

引用

页码：320 / 325

页数：6

共 12 条

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