钛铝同异种合金热熔钻铆接头的力学行为及失效机理  

Mechanical behaviors and failure mechanisms on hot melt drill riveting joints for homogeneous and dissimilar titanium and aluminum alloys

作　　者：李承旺 赵伦 许龙 洪宛璐 霍小乐 林森 郭子鑫 周光平[1] 梁召峰[1] Md Shafiqul Islam Li Chengwang;Zhao Lun;Xu Long;Hong Wanlu;Huo Xiaole;Lin Sen;Guo Zixin;Zhou Guangping;Liang Zhaofeng;MD Shafiqul Islam(Institute of Intelligent Manufacturing Technology,Shenzhen Polytechnic,Shenzhen 518055,China;College of Science,China Jiliang University,Hangzhou 310018,China;Department of Mechanical Engineering,Blekinge Tekniska Högskola,Karlskrona 37179,Sweden)

机构地区：[1]深圳职业技术学院智能制造技术研究院,广东深圳518055 [2]中国计量大学理学院,浙江杭州310018 [3]瑞典布京理工学院机械学院,卡尔斯克鲁纳37179

出　　处：《锻压技术》2023年第10期169-176,共8页Forging & Stamping Technology

基　　金：国家自然科学基金青年基金和面上项目(12104324,12074354);深圳职业技术学院深圳市高端人才科研启动项目(6022310046k)。

摘　　要：以TA1钛合金和5A06铝合金作为实验板材,采用热熔钻铆技术进行连接,通过静拉伸实验和扫描电镜实验对接头的静力学行为及失效机理进行了系统的研究。结果表明:当铝板在下进行铆接时,更有利于形成长而厚的衬套,成形质量更佳,且钛板在上时板材与铆钉间螺纹的啮合程度较低;FTT接头的力学性能最佳并具有最高的缓冲吸震性能,FAT接头的力学性能远高于FTA接头;铝板为下板时,失效形式为典型的韧性断裂特征,铝板为上板时,失效形式呈现脆性断裂特征;钛板断口呈现出剪切断裂和韧性断裂共同作用的混合断裂形式;FAA接头的钉头几乎未损伤,FTT接头的钉头受损严重。For TA1 titanium alloy and 5A06 aluminum alloy experimental plates,the hot-melt drill riveting technology was used to connect them,and the static behavior and failure mechanism of the joints were researched systematically by static tensile test and scanning electron microscope test.The results show that when the aluminum plate is placed below for riveting,it is more conducive to form a long and thick bushing and the forming quality is better,and when the titanium plate is placed on top for riveting,the meshing degree of the thread be-tween the plate and the rivet is lower.The FTT joint has the best mechanical properties and the highest buffering and shock-absorbing properties,and the mechanical properties of FAT joints are much higher than those of FTA joints.When the aluminum plate is the lower plate,the failure mode is typical ductile fracture characteristics,and when the aluminum plate is the upper plate,the failure mode shows brittle fracture characteristics.The fracture of the titanium plate shows a mixed fracture form of shear fracture and ductile fracture.The rivet head of the FAA joints is almost undamaged,and the rivet head of the FTT joints is severely damaged.

关 键 词：热熔钻铆 钛合金 铝合金 力学行为 断口形貌 

分 类 号：TB376.3[一般工业技术—材料科学与工程]