| AI-Si-Cu-Mg(-Er)铸造铝合金的低周疲劳行为 |
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| 引用本文： | 车欣,徐志军,陈立佳,徐海健,李锋.AI-Si-Cu-Mg(-Er)铸造铝合金的低周疲劳行为[J].铸造,2011,60(1). |
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| 作者姓名： | 车欣 徐志军 陈立佳 徐海健 李锋 |
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| 作者单位： | 1. 沈阳工业大学材料科学与工程学院,辽宁,沈阳,110870
2. 空军装备研究院导技所,北京,100085 |
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| 基金项目： | 辽宁省高校重点实验室支持计划资助项目(2008S163) |
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| 摘 要： | 对金属型铸造Al-Si-Cu-Mg和Al-Si-Cu-Mg-Er铝合金进行了疲劳试验,并研究了其室温下的低周疲劳行为。试验结果表明:金属型铸造Al-Si-Cu-Mg和Al-Si-Cu-Mg-Er铝合金表现为循环应变硬化和循环稳定,主要取决于外加总应变的高低;稀土元素Er的加入可提高金属型铸造Al-Si-Cu-Mg合金的循环变形抗力和疲劳寿命;金属型铸造Al-Si-Cu-Mg合金的塑性应变、弹性应变与断裂时的载荷反向次数之间呈直线关系,Al-Si-Cu-Mg-Er合金的弹性应变与疲劳断裂时的载荷反向次数之间也呈直线关系,但其塑性应变与疲劳断裂时的载荷反向次数之间则呈双线性关系。
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| 关 键 词： | 铝合金 金属型铸造 Er 低周疲劳 疲劳寿命 循环应力响应 |
Low-Cycle Fatigue Behavior of Cast AI-Si-Cu-Mg(-Er) Aluminum Alloy |
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| CHE Xin,XU Zhi-jun,CHEN Li-jia,XU Hai-jian,LI Feng.Low-Cycle Fatigue Behavior of Cast AI-Si-Cu-Mg(-Er) Aluminum Alloy[J].Foundry,2011,60(1). |
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| Authors: | CHE Xin XU Zhi-jun CHEN Li-jia XU Hai-jian LI Feng |
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| Affiliation: | CHE Xin1,XU Zhi-jun2,CHEN Li-jia1,XU Hai-jian1,LI Feng1(1.School of Materials Science and Engineering,Shenyang University of Technology,Shenyang 110870,Liaoning,China,2.Missile Technology and Service Institute,Equipment Academe of Air Fore,Beijing 100085,China) |
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| Abstract: | Through the strain-controlled fatigue experiments,the low-cycle fatigue behavior of permanent-mold cast Al-Si-Cu-Mg and Al-Si-Cu-Mg-Er alloys at room temperature was investigated.The experimental results show that the Al-Si-Cu-Mg and Al-Si-Cu-Mg-Er alloys exhibit the cyclic strain hardening and cyclic stability,mainly depending on the imposed total strain amplitude.For the permanent-mold cast Al-Si-Cu-Mg alloy,the addition of Er can effectively enhance both cyclic deformation resistance and fatigue life of ... |
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| Keywords: | aluminum alloy permanent-mold casting Er low-cycle fatigue fatigue life cyclic stress response |
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