| 16Mn钢在空气和3.5% NaCl溶液中的疲劳行为 |
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| 引用本文： | 刘彦国,孙先明,马锦. 16Mn钢在空气和3.5% NaCl溶液中的疲劳行为[J]. 理化检验(物理分册), 2010, 0(8): 475-480 |
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| 作者姓名： | 刘彦国 孙先明 马锦 |
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| 作者单位： | 浙江机电职业技术学院;中国科学院金属研究所金属腐蚀与防护国家重点实验室;武汉材料保护研究所; |
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| 基金项目： | 国家自然科学基金资助项目(50432020); 浙江省自然科学基金资助项目(Y107428) |
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| 摘 要： | 采用哑铃状平板试样,分别研究了16Mn钢在空气中和3.5%NaCl溶液中的疲劳行为,获得了S-N曲线,并对疲劳试样的表面和断口形貌进行了观察。结果表明:3.5%NaCl溶液(与空气相比)使16Mn钢的疲劳强度有较大程度的降低,在空气中16Mn钢的疲劳极限为200 MPa,而在3.5%NaCl溶液中该钢则不存在疲劳极限;空气中的疲劳试样只有一个萌生于试样表面基体的裂纹源,而3.5%NaCl溶液中该钢的疲劳试样一般有多个裂纹源,除了极少数萌生于试样表面基体处,其余均萌生于表面的点蚀坑;空气中疲劳试样裂纹扩展区的断口形貌以疲劳辉纹为主,而3.5%NaCl溶液中的则以沿晶开裂等脆性特征为主。此外还对空气中16Mn钢的疲劳极限进行了预测,预测值与试验值基本吻合。
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| 关 键 词： | 疲劳行为 16Mn钢 裂纹萌生 点蚀坑 裂纹扩展 疲劳极限预测 |
Fatigue Behaviour of 16Mn Steel in Air and 3.5% NaCl Solution |
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| LIU Yan-guo,,SUN Xian-ming,MA Jin. Fatigue Behaviour of 16Mn Steel in Air and 3.5% NaCl Solution[J]. Physical Testing and Chemical Analysis Part A:Physical Testing, 2010, 0(8): 475-480 |
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| Authors: | LIU Yan-guo SUN Xian-ming MA Jin |
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| Affiliation: | LIU Yan-guo1,2,SUN Xian-ming3,MA Jin2(1.Zhejiang Institute of Mechanical and Electrical Engineering,Hangzhou 310053,China,2.State Key Laboratory for Corrosion and Protection,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,3.Wuhan Research Institute of Materials Protection,Wuhan 430030,China) |
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| Abstract: | The fatigue behaviour of 16Mn steel in air and 3.5% NaCl solution were studied by dumble-shaped plate type specimens.The S-N curves show that the fatigue strength of 16Mn steel in 3.5% NaCl solution was much lower than that in air.The fatigue limit of it in air was 200 MPa,but there was no fatigue limit in 3.5% NaCl solution.Surface and fractography observation results show that the fatigue cracks in air were initiated from the matrix of surface,while most of fatigue cracks in 3.5% NaCl solution were initia... |
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| Keywords: | fatigue behaviour 16Mn steel crack initiation pit crack propagation fatigue limit prediction |
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