| 热处理对AE42压铸镁合金低周疲劳行为的影响 |
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| 引用本文： | 吴伟,李红,李锋,陈立佳,单飞虎. 热处理对AE42压铸镁合金低周疲劳行为的影响[J]. 特种铸造及有色合金, 2012, 32(4): 377-380 |
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| 作者姓名： | 吴伟 李红 李锋 陈立佳 单飞虎 |
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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： | 国家科技支撑计划资助项目 |
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| 摘 要： | 研究了固溶+时效处理(T6)对AE42压铸镁合金在疲劳加载条件下的循环应力响应行为、疲劳寿命以及断裂行为的影响。结果表明,压铸态和固溶+时效态的AE42镁合金均表现为循环应变硬化,固溶+时效处理可导致AE42压铸镁合金的循环应力幅有所提高,并可有效提高AE42压铸镁合金的疲劳寿命。疲劳断口形貌观察结果表明,疲劳裂纹萌生于疲劳试样的表面,并以穿晶方式扩展。
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| 关 键 词： | 热处理 压铸 循环应力响应 低周疲劳 疲劳寿命 |
Influence of Heat Treatment on Low-cycle Fatigue Behavior of Die-cast AE42 Magnesium Alloy |
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| Wu Wei , Li Hong , Li Fang , Chen Lijia , Shan Feihu. Influence of Heat Treatment on Low-cycle Fatigue Behavior of Die-cast AE42 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2012, 32(4): 377-380 |
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| Authors: | Wu Wei Li Hong Li Fang Chen Lijia Shan Feihu |
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| Affiliation: | (School of Materials Science and Engineering,Shenyang University of Technology) |
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| Abstract: | Influences of solid solution plus aging treatment(T6) on the cyclic stress response behavior,fatigue life and fracture behavior of die-cast AE42 magnesium alloy were investigated.The results show that AE42 magnesium alloys in different conditions as die-cast state and T6 heat treated state exhibit the cyclic strain hardening during fatigue deformation.Meanwhile,T6 heat treatment can improve the cyclic stress amplitude and fatigue life of the die-cast AE42 alloy.The observation of the fracture surfaces shows that the fatigue cracks are generated at the free surface of the specimens,and propagated in a transgranular mode. |
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| Keywords: | Heat Treatment Die Casting Cyclic Stress Response Low-Cycle Fatigue Fatigue Life |
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