| AS41压铸镁合金的低周疲劳行为 |
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| 引用本文： | 李锋,单飞虎,车欣,王鑫,陈立佳. AS41压铸镁合金的低周疲劳行为[J]. 沈阳工业大学学报, 2011, 33(5): 510-515 |
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| 作者姓名： | 李锋 单飞虎 车欣 王鑫 陈立佳 |
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| 作者单位： | 沈阳工业大学材料科学与工程学院; |
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| 基金项目： | 辽宁省教育厅重点实验室资助项目(2008S163) |
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| 摘 要： | 为了探索AS41压铸镁合金在室温下的低周疲劳变形与断裂行为，分别对压铸态和固溶处理态的AS41镁合金进行了应变控制疲劳实验，并利用S 3400N型扫描电子显微镜对合金的低周疲劳断口形貌进行了观察与分析.结果表明，在低周疲劳加载条件下，合金均表现为循环应变硬化；合金的塑性应变幅、弹性应变幅与断裂时的载荷反向周次之间分别服从Coffin Manson和Basquin公式；AS41压铸镁合金经固溶处理后的组织比压铸态更均匀，强化相分布更弥散，在相同的外加总应变幅下表现出更高的疲劳寿命.断口形貌观察结果揭示，对于两种加工状态的AS41镁合金，疲劳裂纹均以穿晶方式萌生于试样表面并以穿晶方式扩展.
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| 关 键 词： | 镁合金 压铸 固溶处理 显微组织 低周疲劳 循环应力响应 疲劳寿命 疲劳断裂 |
Low-cycle fatigue behavior of die-cast AS41 magnesium alloy |
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| LI Feng,SHAN Fei-hu,CHE Xin,WANG Xin,CHEN Li-jia. Low-cycle fatigue behavior of die-cast AS41 magnesium alloy[J]. Journal of Shenyang University of Technology, 2011, 33(5): 510-515 |
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| Authors: | LI Feng SHAN Fei-hu CHE Xin WANG Xin CHEN Li-jia |
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| Affiliation: | LI Feng,SHAN Fei-hu,CHE Xin,WANG Xin,CHEN Li-jia(School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,China) |
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| Abstract: | In order to investigate the low-cycle fatigue and fracture behavior of die-cast AS41 magnesium alloy at room temperature,the strain-controlled fatigue experiments were performed for the die-cast AS41 alloy with as-received and solid solution treated states.The fracture surfaces of low-cycle fatigued specimens were observed and analyzed with an S-3400N scanning electron microscope.The experimental results show that the AS41 alloy exhibits the cyclic strain hardening under low-cycle loading condition.The rela... |
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| Keywords: | magnesium alloy die casting solid solution treatment microstructure low-cycle fatigue cyclic stress response fatigue life fatigue fracture |
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