锻压技术

铝钛异种薄板冷连接工艺及力学性能研究

英文标题：Cold joining process and mechanical property study for Al-Ti dissimilar plates

分类号：TH131.1

出版年,卷(期):页码：2023,48(7):100-106

摘要：

采用5A06铝合金和TA1钛合金薄板进行自冲铆接、拉铆连接和无铆连接，并进行拉伸试验分析接头的力学性能差异。结果表明：自冲铆接头的整体力学性能最优，拉铆接头次之；搭接顺序对自冲铆接头无明显影响；当5A06铝合金板作为上板时，拉铆接头的静力学性能较好，当TA1钛合金板为上板时，无铆接头的静力学性能较好。自冲铆接头的失效形式主要为铝板拉断且断口处有大量韧窝；拉铆接头的失效形式与薄板搭接顺序有关，铝-钛搭接时接头的失效形式为铝板拉断，钛-铝搭接时接头的失效形式为铝板拉脱；无铆接头的失效形式较为统一，均为颈部断裂失效。

The 5A06 aluminum alloy and TA1 titanium alloy thin plate were used for self-piercing riveting, pulling riveting and clinching, and the tensile tests were conducted to analyze the differences in mechanical properties of joints. The results show that the overall mechanical properties of the self-piercing riveted joint are the best, followed by the pulling riveted joint, and the lapping sequence has no obvious effect on the self-piercing riveted joint. When the 5A06 aluminum alloy plate is used as the upper plate, the static mechanical properties of the pulling riveted joint are better, and when the TA1 titanium alloy plate is used as the upper plate, the static mechanical properties of the clinching joint are better. The failure mode of self-piercing riveted joint is mainly that the aluminum plate is broken and a large number of dimples appear at the fracture, and the failure mode of the pulling riveted joint is related to the overlapping sequence of thin plates. In addition, the failure mode of the aluminum-titanium lap joint is that the aluminum plate is broken, the failure mode of the titanium-aluminum lap joint is the pull-off of aluminum plate, and the failure mode of the clinching joint is relatively uniform, which is the failure of neck fracture.

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面上项目(2021M703392)；深圳职业技术学院博士后启动基金(6022310046k)

作者简介：雷乐(1999-)，男，硕士研究生 E-mail：leile319777@163.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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