锻压技术

TA1/5A06同质自冲铆接头的力学性能

英文标题：Mechanical properties for TA1/5A06 homogeneous self-piercing riveted joints

作者：郭子鑫1 2 赵伦1 3 郭媛媛2 齐晓志3 刘纪元1 霍小乐1 林森1 Md Shafiqul Islam4

单位：1．深圳职业技术学院智能制造技术研究院 2．辽宁科技大学材料与冶金学院 3．中国科学院深圳先进技术研究院集成所 4．布京理工学院机械学院

分类号：TH131.1

出版年,卷(期):页码：2022,47(12):135-141

摘要：

为了进一步研究自冲铆接技术在航空航天领域的应用，选用TA1钛合金和5A06铝合金航空合金薄板材料作为基板，采用自冲铆接技术进行连接，并通过拉伸试验和扫描电镜试验对接头的静力学性能及微观组织进行系统的研究。结果表明：同质接头的成形对称性良好，铆接较硬板材时易出现空腔；基板的自身性能对接头静载强度的影响较大；5A06-5A06接头的失效位移最大，上板拉脱是由于铆钉周围产生了微裂纹；TA1-TA1接头的静失效载荷最大，缓冲吸震性能较好，其接头铆钉的断裂形式为沿晶断裂和显微孔穴聚集共同作用的混合型断裂。

In order to further study the application of self-piercing riveting technology in aerospace field, TA1 titanium alloy and 5A06 aluminum alloy aviation alloy sheet materials were selected as substrates, and the self-piercing riveting technology was used for connection. Then, the static performance and microstructure of joint were systematically studied by tensile test and SEM test. The results show that the forming symmetry of homogeneous joint is good, and the cavity is easy to appear when riveting the hard plate. The performance of substrate has a great influence on the static strength of joint. The failure displacement of 5A06-5A06 joint is the largest, and the pull-off of upper plate is due to the appearance of micro-cracks around the rivet. The static failure load of TA1-TA1 joint is the largest, and its cushioning and shock absorption performance is good. The rivet fracture mode of the joint is a mixed fracture of intergranular fracture and micro-cavity aggregation.

基金项目：

国家自然科学基金资助项目(12104324);中国博士后科学基金(2021M703392);深职院博士后启动基金(6022310046K)

郭子鑫（1996-），男，硕士研究生 E-mail：zixin_guo@126.com 通信作者：赵伦（1988-），男，博士，副研究员 E-mail：zhaolun@szpt.edu.cn

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