| 挤压态AZ31镁合金的疲劳行为研究 |
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| 引用本文： | 毛萍莉,李扬,刘正,贾莹莹,陈立佳. 挤压态AZ31镁合金的疲劳行为研究[J]. 特种铸造及有色合金, 2010, 30(3). DOI: 10.3870/tzzz.2010.03.006 |
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| 作者姓名： | 毛萍莉 李扬 刘正 贾莹莹 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： | 国家重点基础研究发展计划(973计划)资助项目，辽宁省教育厅创新团队项目 |
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| 摘 要： | 通过外加总应变幅控制的疲劳试验和断口形貌分析,确定了挤压态AZ31镁合金的循环应力响应行为、循环变形行为、疲劳寿命行为和疲劳断裂机制。结果表明,在外加总应变幅控制的疲劳加载条件下,挤压态AZ31镁合金呈现明显的循环应变硬化现象和拉-压不对称循环变形现象,其弹性应变幅、塑性应变幅与断裂时的载荷反向周次之间的关系可分别用Basquin和Coffin-Manson公式来描述,断口上的疲劳裂纹的萌生和扩展均以穿晶模式进行。
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| 关 键 词： | 镁合金 弹性应变幅 塑性应变幅 疲劳断裂 循环应力响应 循环变形 疲劳寿命 疲劳裂纹 |
Fatigue Behavior of As-extruded AZ31 Magnesium Alloy |
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| Mao Pingli,Li Yang,Liu Zheng,Jia Yingying,Chen Lijia. Fatigue Behavior of As-extruded AZ31 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2010, 30(3). DOI: 10.3870/tzzz.2010.03.006 |
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| Authors: | Mao Pingli Li Yang Liu Zheng Jia Yingying Chen Lijia |
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| Affiliation: | Mao Pingli,Li Yang,Liu Zheng,Jia Yingying,Chen Lijia(School of Materials Science , Engineering,Shenyang University of Technology,Shenyang,China) |
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| Abstract: | Behaviors of cyclic stress response and cyclic deformation,fatigue life as well as fracture mechanism were identified for as-extruded AZ31 magnesium alloy through total-strain-amplitude controlled fatigue testing and analysis on fracture surface of fatigued specimens.The results indicate that the as-extruded AZ31 alloy exhibits significant cyclic strain hardening and stretch-compression asymmetry in cyclic deformation,and the relationship between elastic strain amplitude,plastic strain amplitude and reversa... |
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| Keywords: | Magnesium Alloy Elastic Strain Amplitude Plastic Strain Amplitude Fatigue Fracture Cyclic Stress Response Cyclic Deformation Fatigue Life Fatigue Cracks |
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