| 预拉伸变形后X60管线钢疲劳裂纹扩展特性 |
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| 引用本文： | 陈美宝,王荣. 预拉伸变形后X60管线钢疲劳裂纹扩展特性[J]. 机械工程材料, 2004, 28(7): 18-20 |
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| 作者姓名： | 陈美宝 王荣 |
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| 作者单位： | 西安石油大学机械工程学院,陕西西安,710065 |
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| 基金项目： | 江苏省高新技术产业化资助项目(JH01-071) |
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| 摘 要： | 用单边裂纹试样，研究了X60管线钢经预拉伸变形量为5％、10％和15％后的疲劳裂纹扩展特性。结果表明：随着预拉伸变形量的增加，疲劳裂纹扩展速率提高，尤其是在裂纹扩展的近门槛区。定量分析表明：预拉伸变形降低了疲劳裂纹扩展门槛值，提高了裂纹扩展系数，从而使管线在机械损伤的部位疲劳抗力降低。
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| 关 键 词： | 疲劳 裂纹扩展 预变形 门槛值 管线钢 |
| 文章编号： | 1000-3738(2004)07-0018-03 |
Fatigue Crack Propagation of X60 Pipeline Steel after Pre-tension Deformation |
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| CHEN Mei-bao,WANG Rong. Fatigue Crack Propagation of X60 Pipeline Steel after Pre-tension Deformation[J]. Materials For Mechanical Engineering, 2004, 28(7): 18-20 |
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| Authors: | CHEN Mei-bao WANG Rong |
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| Abstract: | In the present study, experimental investigations were carried out on the fatigue crack propagation characteristics of X60 pipeline steel after different degrees of pre-tension deformation (5%, 10%, 15%). Test results showed that the fatigue crack propagation rate increased with increasing the pre-tension deformation degree, especially at the near threshold section. The results of quantitative analysis showed that the pre-tension deformation reduced the fatigue crack propagation threshold and increased the crack propagation coefficient, and consequently decreased the fatigue resistance of the part with mechanical damage. |
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| Keywords: | fatigue crack propagation pre-deformation threshold pipeline steel |
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