摘要
随着“双碳”政策的提出,轻量化已成为各行业发展的重要课题,铝合金轻量化及其连接技术研究在机械各领域备受青睐并推广。为研究铝合金自冲铆接头的力学性能,使用自冲铆连接工艺连接了6061铝合金自冲铆接头和5754铝合金自冲铆接头,对比了两种铝合金接头的几何参数、显微硬度、静力学性能和疲劳性能。结果表明,两种铝合金接头成形的几何参数相近,5754接头搭接区域的硬度和低疲劳载荷下的连接力学性能优于6061接头,但在高疲劳载荷下6061接头的连接力学性能反而更优。通过结合失效接头中黑色氧化物和疲劳载荷下的微动损伤分析结果,建立了两种铝合金接头基于Paris公式的疲劳寿命预测模型,预测结果与实验数据吻合良好。
With the proposal of the‘double carbon’policy,lightweight has become an important topic for the development of various industries,and the research on lightweight aluminum alloy and its connection technology has been favored and promoted in various fields of machinery.In order to study the mechanical properties of the self-impingement rivets of aluminum alloy,the self-impingement rivets of 6061 aluminum alloy and 5754 aluminum alloy were connected by the self-impingement riveting process,and the geometric parameters,microhardness,static properties and fatigue properties of the two aluminum alloy joints were compared.The results show that the forming geometric parameters of the two aluminum alloy joints are similar,and the mechanical properties of 5754 joints are better than 6061 joints under low fatigue load and hardness in the lap area,but the mechanical properties of 6061 joints are better under high fatigue load.The fatigue life prediction models based on Paris formula for two kinds of aluminum alloy joints are established by combining the results of fretting damage analysis in the failed joints with black oxide and fatigue load.The predicted results are in good agreement with the experimental data.
作者
邱飒蔚
雷贝
叶拓
张越
蒋家传
王涛
QIU Sawei;LEI Bei;YE Tuo;ZHANG Yue;JIANG Jiachuan;WANG Tao(School of Intelligent Manufacturing and Mechanical Engineering,Hunan Institute of Technology,Hengyang 421002,Hunan,China;Research Institute of Automobile Parts Technology,Hunan Institute of Technology,Hengyang 421002,Hunan,China;School of Mechanical Engineering and Mechanics,Xiangtan University,Xiangtan 411105,Hunan,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2024年第18期226-232,共7页
Materials Reports
基金
国家自然科学基金(52201074,51901199)
湖南省优秀博士后创新人才项目(2021RC2093)。
关键词
自冲铆接
铝合金
机械连接
疲劳寿命
微动损伤
self-piercing riveting
aluminum alloy
mechanical connection
fatigue life
fretting damage
