| 不同标印工艺对2A70铝合金的高周疲劳性能的影响 |
| |
| 引用本文： | 周松,胡馨月,安金岚,许良,王磊.不同标印工艺对2A70铝合金的高周疲劳性能的影响[J].稀有金属材料与工程,2021,50(5):1833-1839. |
| |
| 作者姓名： | 周松 胡馨月 安金岚 许良 王磊 |
| |
| 作者单位： | 沈阳航空航天大学机电工程学院,沈阳航空航天大学机电工程学院,沈阳航空航天大学航空制造工艺数字化国防重点学科实验室,沈阳航空航天大学机电工程学院,沈阳航空航天大学航空制造工艺数字化国防重点学科实验室 |
| |
| 基金项目： | 国家自然科学基金(51775355);沈阳航空航天大学青年博士科研启动基金(18YB55) |
| |
| 摘 要： | 本文研究了2A70铝合金在激光标印、振动标印后的高周疲劳性能及断裂机理。结果表明,与母材相比,振动标印后2A70合金高周疲劳寿命下降了57%,而激光标印后下降了94%,仅是振动标印疲劳寿命的14%;与激光标印相比,振动标印附近的形貌更为平缓,应力集中程度更小,S"相尺寸更小,体积分数更高;Al9FeNi相尺寸更小,体积分数更高,裂纹萌生、扩展速率更低,疲劳寿命更长;应力集中的程度和析出相尺寸、体积分数的共同作用,导致振动标印下的2A70铝合金高周疲劳性能远远优于激光标印。
|
| 关 键 词： | 高周疲劳 2A70铝合金 应力集中 析出相 |
| 收稿时间： | 2020/7/8 0:00:00 |
| 修稿时间： | 2020/8/25 0:00:00 |
Effect of Different Marking Processes on High Cycle Fatigue Performance of 2A70 Aluminum Alloy |
| |
| zhousong,huxinyue,anjinlan,xuliang and wanglei.Effect of Different Marking Processes on High Cycle Fatigue Performance of 2A70 Aluminum Alloy[J].Rare Metal Materials and Engineering,2021,50(5):1833-1839. |
| |
| Authors: | zhousong huxinyue anjinlan xuliang and wanglei |
| |
| Abstract: | The high cycle fatigue performance and fracture mechanism of 2A70 aluminum alloy after laser and vibration marking were studied.The results showed that compared with the base material, the high cycle fatigue life of 2A70 alloy after vibration marking decreased by 57% and that of laser marking decreased by 94%, which was only 14% of the fatigue life of vibration marking.Compared with laser marking, the topography near vibration marking is more gentle, the stress concentration degree is smaller, the S "phase size is smaller and the volume fraction is higher.Al9FeNi phase has smaller size, higher volume fraction, lower crack initiation and propagation rate, and longer fatigue life.The high cycle fatigue performance of 2A70 aluminum alloy under vibration marking is much better than that under laser marking due to the joint action of stress concentration, precipitation phase size and volume fraction.S |
| |
| Keywords: | High cycle fatigue 2A70 aluminum alloy stress concentration precipitation phase |
|
| 点击此处可从《稀有金属材料与工程》浏览原始摘要信息 |
|
点击此处可从《稀有金属材料与工程》下载全文 |
|
