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| 高强铝合金疲劳特性研究 | |
| 引用本文： | 杜凤山,闫亮,戴圣龙,杨守杰.高强铝合金疲劳特性研究[J].航空材料学报,2009,29(1):96-100. |
| 作者姓名： | 杜凤山 闫亮 戴圣龙 杨守杰 |
| 作者单位： | 1. 北京航空材料研究院,北京,100095;燕山大学,机械与工程学院,河北,秦皇岛,066004 2. 燕山大学,机械与工程学院,河北,秦皇岛,066004 3. 北京航空材料研究院,北京,100095 |
| 基金项目： | 国家重点基础研究发展规划(973计划) |
| 摘 要： | 研究了室温大气环境下不同应力比R和不同应力集中系数Kt条件下2E12高强铝合金的高周疲劳性能,并利用扫描电镜及透射电镜对合金疲劳断口附近的微观组织及疲劳断口进行了分析.研究结果表明,在同一应力水平下,2E12高强铝合金的疲劳寿命随着应力比R的增大而提高;Kt=1时合金的疲劳寿命远远大于Kt=3时合金的疲劳寿命,表明此合金具有明显的缺口效应.疲劳断口由疲劳源区、裂纹扩展区及瞬断区组成.第二相对疲劳裂纹的萌生起着重要的作用,并且初步讨论了有关的疲劳断裂机理. |
| 关 键 词： | 铝合金疲劳寿命 裂纹萌生 断口分析 断裂机理 |
Study on Fatigue Performance of High Strength Aluminum Alloy |
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| DU Feng-shan,YAN Liang,DAI Sheng-long,YANG Shou-jie.Study on Fatigue Performance of High Strength Aluminum Alloy[J].Journal of Aeronautical Materials,2009,29(1):96-100. | |
| Authors: | DU Feng-shan YAN Liang DAI Sheng-long YANG Shou-jie |
| Institution: | 1.Beijing Institute of Aeronautical Materials;Beijing 100095;China;2 School of mechanical engineering;Yanshan University;Qinhangdao 066004;China |
| Abstract: | High cycle fatigue of 2E12 aluminum alloy was investigated under different stress ratio and stress concentration factor at room temperature,and fracture mechanism was discussed.The microstructures and fatigue fracture surfaces of the alloy were examined by transmission electron microscopy and scanning electron microscopy.The results showed that the fatigue life of 2E12 aluminum alloy improves with increasing of stress ratio and the fatigue life of Kt=1 was longer than that of Kt=3,exhibiting notch sensitivi... |
| Keywords: | aluminum allay fatigue life crack initiation fracture micrography analysis fracture mechanism |
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