| 13CrMo44钢及焊缝金属的疲劳裂纹扩展速率 |
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| 引用本文： | 李广铎,周志良.13CrMo44钢及焊缝金属的疲劳裂纹扩展速率[J].大连铁道学院学报,1988(4). |
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| 作者姓名： | 李广铎 周志良 |
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| 作者单位： | 大连铁道学院焊接教研室，大连铁道学院焊接教研室 |
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| 摘 要： | 本文根据美国ASTM F647-81标准,采用紧凑拉伸试样,对13CrMo44钢及用P5(E309Mo)焊条的手弧对接焊缝金属的疲劳裂纹扩展速率进行了测定.试验采用表面直读法测量裂纹长度、并采用抛物线回归法对大量试验数据进行微机处理.基于Paris公式,得到了13CrMo44钢和焊缝金属的裂纹扩展速率的表达式.
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| 关 键 词： | 焊缝 裂纹扩展 应力/疲劳裂纹 扩展速率 |
The Fatigue Crack Growth Rates for 13CrMo44 Steel and Its Weld Metal |
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| Li Guangduo Zhou Zhiliang.The Fatigue Crack Growth Rates for 13CrMo44 Steel and Its Weld Metal[J].Journal of Dalian Railway Institute,1988(4). |
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| Authors: | Li Guangduo Zhou Zhiliang |
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| Institution: | Li Guangduo Zhou Zhiliang |
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| Abstract: | According to the standard of America ASTM E647-81, the fatigue crack growth rates for 13CrMo44 steel and its weld metal of butt joint welded with an electrode mode of P5 (E309Mo) are measured with Compact-Type(CT) specimena The length of cracks is measured hy means of a visual measurement and a great number of data in the test are calculated by an incremental polynomial method with a microcomputer. The formulas of fatigue crack growth rates for 13CrMo44 steel and its weld metal are obtained from the equation of Paris. |
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| Keywords: | weld crack growth stress/fatigue crack propagation rate |
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