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低合金白口铸铁热疲劳裂纹扩展动力学
Kinetics of Thermal Fatigue Crack Propagation in Low Alloy White Cast Iron
【摘要】 研究了低合金白口铸铁在560~640℃范围内热疲劳裂纹扩展动力学。结果表明:低合金白口铸铁热疲劳裂纹的扩展长度L、裂纹扩展速度v与循环次数N之间分别符合L=bNa(a<1)和v=bNa-1,扩展激活能为24.50kJ/mol。
【Abstract】 The kinetics of thermal fatigue crack propagation in a low alloy white cast iron was studied under the temperature range of 560~640 ℃.The results show that the relatianship between crack propagation length L,crack propagation rate v and cycle times N can be expressed as L=bNa(a<1) and v=bNa-1 respectively,and the activation energy of crack propagation is 24.50 kJ/mol.
【关键词】 低合金白口铸铁;
热疲劳;
裂纹扩展;
【Key words】 low alloy white cast iron; thermal fatigue; crack propagation;
【Key words】 low alloy white cast iron; thermal fatigue; crack propagation;
- 【文献出处】 热加工工艺 ,Hot Working Technology , 编辑部邮箱 ,2008年13期
- 【分类号】TG143.1
- 【被引频次】2
- 【下载频次】96