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| 室温大气环境下不同时效态2A12合金的疲劳行为 | |
| 引用本文： | 金晓鸥,金晓男,赵慧杰,何世禹,吕兴群. 室温大气环境下不同时效态2A12合金的疲劳行为[J]. 材料工程, 2009, 0(12) |
| 作者姓名： | 金晓鸥 金晓男 赵慧杰 何世禹 吕兴群 |
| 作者单位： | 1. 黑龙江大学,建筑工程学院,哈尔滨,150080 2. 中国船舶重工集团公司第七零三研究所,哈尔滨,150036 3. 哈尔滨工业大学,材料科学与工程学院,哈尔滨,150001 |
| 基金项目： | 国家重点基础研究发展规划资助项目 |
| 摘 要： | 在拉-压疲劳试验机上对室温大气环境下欠时效态、峰时效态、过时效态和自然时效态2A12合金的疲劳行为进行研究,并采用扫描电镜(SEM)分析室温大气环境下不同时效态对疲劳断口形貌的影响.结果表明:在室温大气环境下,四种时效态2A12合金的疲劳断裂循环次数均随着循环应力的减小而明显增加.循环应力水平越低,疲劳寿命提高越明显;各时效态的疲劳断口均为穿晶断口.断口中均出现疲劳条纹、台阶和韧窝,并在较低循环应力下,疲劳条纹出现的区域较多;欠时效态和峰时效态断口上还可观察到轮胎花样.自然时效态表现出最好的疲劳裂纹扩展阻力,其次是欠时效态、峰时效态,过时效态的疲劳裂纹扩展阻力最低.对室温大气环境下各时效态2A12合金疲劳行为进行了讨论. |
| 关 键 词： | 2A12合金 时效 空气环境 疲劳行为 |
Fatigue Behavior of 2A12 Alloy at Different Aged States in Air |
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| JIN Xiao-ou,JIN Xiao-nan,ZHAO Hui-jie,HE Shi-yu,LU Xing-qun. Fatigue Behavior of 2A12 Alloy at Different Aged States in Air[J]. Journal of Materials Engineering, 2009, 0(12) | |
| Authors: | JIN Xiao-ou JIN Xiao-nan ZHAO Hui-jie HE Shi-yu LU Xing-qun |
| Affiliation: | JIN Xiao-ou1,JIN Xiao-nan2,ZHAO Hui-jie3,HE Shi-yu3,LU Xing-qun1(1 School of Architecture , Engineering,Heilongjiang University,Harbin 150080,China,2 No.703Research Institute of China Shipbuilding Industry Corporation,Harbin 150036,3 School of Materials Science , Engineering,Harbin Institute of Technology,Harbin 150001,China) |
| Abstract: | The fatigue behavior of under-aged,peak-aged,over-aged and nature-aged 2A12 alloy in air at room temperature was investigated using a tension-compression fatigue testing machine.The effect of air on the fatigue fractures was studied by means of scanning electron microscopy(SEM).The results showed that the cycle number of fatigue breakdown increased obviously with the cyclic stress decreasing for each aged 2A12 alloy,the lower the cyclic stress level,the more obvious increased the fatigue lifetime,in atmosph... |
| Keywords: | 2A12 alloy aged air environment fatigue behavior |
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