| MB8镁合金高周疲劳实验研究 |
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| 引用本文： | 杨友. MB8镁合金高周疲劳实验研究[J]. 材料工程, 2010, 0(12) |
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| 作者姓名： | 杨友 |
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| 作者单位： | 长春工业大学,材料科学与工程学院,长春,130012;长春工业大学先进结构材料省部共建教育部重点实验室,长春,130012 |
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| 基金项目： | 吉林省科技厅应用基础研究资助项目(20090544) |
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| 摘 要： | 采用升降法对MB8镁合金室温高周疲劳行为进行实验研究。结果表明:利用升降法计算出MB8镁合金在应力比R=0.1,循环基数为107条件下的疲劳强度为90.2MPa,相当于其抗拉强度的34%左右;合金的疲劳裂纹萌生于试样表面,裂纹扩展区由小的平面状断面组成,没有明显的疲劳辉纹存在,合金疲劳断口呈现韧性断裂特征。
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| 关 键 词： | MB8镁合金 高周疲劳 升降法 疲劳强度 |
Experimental Investigation on High Cycle Fatigue Behaviors of MB8 Magnesium Alloy |
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| YANG You. Experimental Investigation on High Cycle Fatigue Behaviors of MB8 Magnesium Alloy[J]. Journal of Materials Engineering, 2010, 0(12) |
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| Authors: | YANG You |
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| Affiliation: | YANG You1,2(1 School of Materials Science , Engineering,Changchun University of Technology,Changchun 130012,China,2 Key Laboratory of Advanced Structural Materials,Ministry of Education,China) |
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| Abstract: | The high cycle fatigue behavior of MB8 magnesium alloy at room temperature was investigated by fatigue test using up-and-down method.The fatigue strength of MB8 magnesium alloy was 90.2MPa under stress ratio R=0.1 and cycles N=107 conditions.The fatigue strength was about 34% of its tensile strength.The fatigue cracks initiated at surface of the samples.The fatigue crack propagation regions of MB8 alloy were composed of some facets,and without obvious fatigue striations.The fatigue fracture surface of speci... |
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| Keywords: | MB8 magnesium alloy high cycle fatigue up-and-down method fatigue strength |
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