| 10CrNiMo高强钢的低周疲劳特性 |
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| 引用本文： | 张亚军.10CrNiMo高强钢的低周疲劳特性[J].北京科技大学学报,2011,33(1):22-27. |
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| 作者姓名： | 张亚军 |
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| 作者单位： | 洛阳船舶材料研究所,洛阳,471039 |
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| 摘 要： | 采用圆形横截面光滑试样,通过轴向不同应变幅控制的低周疲劳试验,研究了10CrNiMo高强钢的低周疲劳特性,包括循环应力-应变行为、应变-寿命特点、循环应力响应及其力学滞后现象,给出了相应的疲劳参数、循环软硬化特性及应变滞后规律.对裂纹扩展方向及试样疲劳断口的观察表明:裂纹扩展面与轴向力呈现多角度关系,裂纹萌生于试样表面,沿断口周边分布,且具有多源性;疲劳裂纹主要以锐化--钝化机制扩展.
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| 关 键 词： | 高强钢 低周疲劳 疲劳性能 断口 |
Low cycle fatigue characteristic of 10CrNiMo high-strength steel |
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| ZHANG Ya-jun.Low cycle fatigue characteristic of 10CrNiMo high-strength steel[J].Journal of University of Science and Technology Beijing,2011,33(1):22-27. |
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| Authors: | ZHANG Ya-jun |
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| Institution: | ZHANG Ya-jun Luoyang Ship Material Research Institute,Luoyang 471039,China |
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| Abstract: | Low cycle fatigue characteristics of 10CrNiMo high-strength steel were investigated with smooth rotundity-section specimens through low cycle fatigue testing under axial loading controlled by different strain amplitudes,including cyclic stress-strain behavior,strain-life feature,cyclic stress response and mechanical hysteresis.The relevant fatigue parameters,cyclic softening/hardening property and strain hysteretic rule were given on the basis of experimental data.Observations of crack propagation orientati... |
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| Keywords: | high strength steel low cycle fatigue fatigue properties fracture |
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