铸造2017，Vol.66Issue(8)：868-870,875,4.
高碳当量灰铸铁低周疲劳行为研究
Study on Low Cycle Fatigue Behavior of High Carbon Equivalent Gray Cast Iron
王笃雄 1郑志伟 1顾晓文 2肖伟祥 2陈荣发 1赵玉宝2
作者信息
- 1. 扬州大学机械工程学院,江苏扬州 225127
- 2. 通富热处理(昆山)有限公司,江苏昆山 215300
- 折叠
摘要
Abstract
The low cycle fatigue behavior of high carbon equivalent gray cast iron at room temperature was studied by the use of electro-hydraulic servo static universal testing machine, metallographic microscope and scanning electron microscopy. The constant strain fatigue test shows that the number of cyclic fractures of high carbon equivalent gray cast iron is small, and it decreases with increasing strain amplitude. Fatigue fracture analysis shows that the fatigue cracks are initiated on the surface, casting defects and flaky graphite tips, and the cracks propagated along the graphite. The fatigue fracture mode is intergranular brittle fracture. A large number of flaky graphites exist in high carbon equivalent gray cast iron, which cut the matrix, promote the expansion of the crack and accelerate the fatigue fracture process.关键词
高碳当量/灰铸铁/低周疲劳/疲劳裂纹Key words
high carbon equivalent/gray cast iron/low cycle fatigue/fatigue crack分类
矿业与冶金引用本文复制引用
王笃雄,郑志伟,顾晓文,肖伟祥,陈荣发,赵玉宝..高碳当量灰铸铁低周疲劳行为研究[J].铸造,2017,66(8):868-870,875,4.
