| 不同碳含量的CrNiMo钢疲劳裂纹扩展特性 |
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| 引用本文： | 赵康,井晓天.不同碳含量的CrNiMo钢疲劳裂纹扩展特性[J].机械科学与技术(西安),1999,18(1):127-129. |
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| 作者姓名： | 赵康 井晓天 |
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| 作者单位： | [1]西北工业大学 [2]西安理工大学 |
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| 摘 要： | 三种不同碳含量的ＣｒＮｉＭｏ 钢的疲劳扩展试验结果表明，随着钢中碳含量升高，裂纹扩展速率升高。回归分析表明，ＣｒＮｉＭｏ 钢的疲劳裂纹扩展速率符合以下公式：ｄａ／ｄｎ＝ Ｂ（ｄｋ－ ｄｋｔｈ ）２ ，其中疲劳裂纹扩展系数Ｂ值可以由材料拉伸性能估算。该式的有效性还以不同应力比下的疲劳裂纹扩展数据进行了验证。
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| 关 键 词： | CrNiMo钢 疲劳裂纹扩展 门槛值 |
Fatigue Properties of CrNiMo Steels with Different Carbon Content |
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| Zhao Kang,Zheng Xiulin Jing Xiaotian Gu Chenqing.Fatigue Properties of CrNiMo Steels with Different Carbon Content[J].Mechanical Science and Technology,1999,18(1):127-129. |
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| Authors: | Zhao Kang Zheng Xiulin Jing Xiaotian Gu Chenqing |
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| Affiliation: | Zhao Kang 1 Zheng Xiulin Jing Xiaotian Gu Chenqing |
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| Abstract: | Fatigue properties of CrNiMo steels with different carbon contents were investigated. The analysis of test results shows that fatigue crack growth rate can be expressed as da/dn=B(dk-dk th ) 2, where the fatigue resistant coefficient B can be predicted from tensile properties. Fatigue crack growth rates of CrNiMo steels under different stress ratios can also be expressed by the above mentioned formula. |
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| Keywords: | CrNiMo steel Fatigue crack growth Threshold value |
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