锻压技术

航空铝合金自冲铆接接头微观失效研究

英文标题：Microscopic failure study on self-piercing riveting joints for aviation aluminum alloys

作者：林　森1 赵　伦1 肖　钢1 韦　武2 霍小乐1 郭子鑫1 周光平1 陈　伟1 何晓聪3 邢保英3 Md Shafiqul Islam4

单位：1. 深圳职业技术学院智能制造技术研究院 2. 贵州大学 3. 昆明理工大学 4. 布京理工学院

分类号：TH131. 1

出版年,卷(期):页码：2023,48(1):121-127

摘要：

采用自冲铆接技术实现了2A12 和6061 航空铝合金薄板材料的有效连接, 通过进行拉伸-剪切测试, 从宏观层面分析了接头静失效形式, 从微观层面研究了接头拉脱失效和基板断裂失效机理。结果表明: 航空铝合金自冲铆接接头的主要静失效形式为拉脱失效, 并有接头伴随纽扣脱落现象, 同时有上板断裂和下板断裂的失效形式出现。对拉脱失效机理进行分析, 从宏观上发现接头有明显的刮蹭和大幅的塑性形变; 从微观上发现, 上板的断裂失效机理为沿晶断裂和局部显微孔洞聚集, 下板的断裂失效机理为板材上下边缘区域以剪切断裂为主、靠近试样厚度中心区域以微孔洞聚集型正断为主。

The effective connection of 2A12 and 6061 aviation aluminum alloy sheet materials was realized by self-piercing riveting (SPR) technology, and a tensile-shear test was conducted. Then, the static failure form of joint was analyzed from the macroscopic level, and the failure mechanisms of joint pull-out and substrate fracture were studied from the microscopic level. The results show that the main form of static failure for aviation aluminum alloy SPR joint is a pull-out failure, and there is a phenomenon of joint pull-out with button-off. At the same time, there are failure modes of upper sheet fracture and lower sheet fracture. The pull-off failure mechanism was analyzed. From the macroscopic point of view, it is found that the joint has obvious scratches and large plastic deformation. From the microscopic point of view, it is found that the fracture failure mechanism of the upper sheet is intergranular fracture and local microscopic hole aggregation, the fracture failure mechanism of the lower sheet is dominated by shear fracture in the upper and lower edge areas of sheet, and the normal fracture of the microscopic hole aggregation type is mainly in the area near the thickness center of specimen.

基金项目：

国家自然科学基金青年基金和面上项目(12104324,12074354); 中国博士后科学基金面上项目(2021M703392);深圳职业技术学院深圳市高端人才科研启动项目(6022310046k)

作者简介: 林　森(1995-), 男, 硕士研究生 E-mail: linsen233keep@ 163. com 通信作者: 赵　伦(1988-), 男, 博士, 特聘副研究员 E-mail: zhaolun@ szpt. edu. cn

参考文献：

[1] 　宫伟, 朱锦超, 栾兰. 航空驱动机构轻量化设计与仿真分析[J]. 航空工程进展, 2021, 12 (3): 112-120.

Gong W, Zhu J C, Luan L. Lightweight design and simulation analysis of aviation ariving mechanism [J]. Advances in Aeronautical Science and Engineering, 2021, 12 (3): 112-120.

[2] 　刘景博, 刘世锋, 杨鑫, 等. 金属增材制造技术轻量化应用研究进展[J]. 中国材料进展, 2020, 39 (2): 163-168.

Liu J B, Liu S F, Yang X, et al. Progress in lightweight application research of additive manufacturing technology [J]. Materials China, 2020, 39 (2): 163-168.

[3] 　陈轩. 助力飞机“ 瘦身” 的轻量化技术[ J]. 大飞机,2018, (9): 30-32, 34.

Chen X. Lightweight technology of booster aircraft “ slimming” [J]. Jetliner, 2018, (9): 30-32, 34.

[4] 　杜森. 热处理对2A12 铝合金包铝薄板组织性能及表面形貌影响的研究[D]. 北京: 北京有色金属研究总院, 2020.

Du S. Effect of Heat Treating on Microstructure, Properties and Surface Morphology of 2A12 Aluminum Alloy Thin Sheet Cladded with Pure Aluminum [D]. Beijing: General Research Institute for Nonferrous Metals, 2020.

[5] 　李国俊, 白雪智, 李碧聪, 等. 大型6061 铝合金锥筒形件成形及组织与性能研究[J]. 锻压技术, 2021, 46 (9): 216-223.

Li G J, Bai X Z, Li B C, et al. Research on forming, microstructure and properties of large-scale cone-cylinder part for 6061 aluminum alloy [J]. Forging & Stamping Technology, 2021, 46 (9):216-223.

[6] 　杨进, 邢保英, 何晓聪, 等. 粘接剂对腐蚀环境中异质自冲铆接头静力学性能的影响[J]. 塑性工程学报, 2022, 29(5): 119-124.

Yang J, Xing B Y, He X C, et al. Effect of adhesive on static mechanical properties of heterogeneous self-piercing riveting joints in corrosive environment [ J]. Journal of Plasticity Engineering, 2022, 29 (5): 119-124.

[7] 　张先炼. 航空轻合金薄板自冲铆接微动疲劳机理研究[D].昆明: 昆明理工大学, 2017.

Zhang X L. Research on Fretting and Fatigue Mechanism of Selfpiercing Riveting in Aerial Light Alloy Sheets [ D]. Kunming: Kunming University of Science and Technology, 2017.

[8] 　Zhao H, Han L, Liu Y P, et al. Quality prediction and rivet/ die selection for SPR joints with artificial neural network and genetic algorithm [ J]. Journal of Manufacturing Processes, 2021, 66:574-594.

[9] 　赵伦, 何晓聪, 张先炼, 等. TA1 钛合金单搭自冲铆接头微动磨损机理[J]. 材料导报, 2018, 31 (2): 73-76.

Zhao L, He X C, Zhang X L, et al. Fretting wear mechanisms of single lap self-piercing riveted joint in TA1 titanium alloy [J].Materials Reports, 2018, 31 (2): 73-76.

[10] 吕远, 亓海全, 眭文杰, 等. HC340LA 镀锌板/6061-T6 铝合金自冲铆接头力学性能研究[J]. 汽车工艺与材料, 2020,(9): 6-11.

Lyu Y, Qi H Q, Sui W J, et al. Study on mechanical properties of HC340LA galvanized sheet/6061-T6 aluminum alloy self-piercing riveting joint [ J]. Automobile Technology & Material, 2020,(9): 6-11.

[11] 张永超, 黄志超, 贾颖莲. B1500HS 高强度钢与AA5052 铝合金自冲铆接成形与力学性能分析[J]. 塑性工程学报,2021, 28 (10): 122-129.

Zhang Y C, Huang Z C, Jia Y L. Forming and mechanical properties analysis of self-piercing riveted joints of B1500HS high strength steel and AA5052 aluminum alloy [J]. Journal of Plasticity Engineering, 2021, 28 (10): 122-129.

[12] 毛晓东, 刘庆永, 李利, 等. 5182-O 铝合金板材自冲铆接工艺参数对接头组织和性能的影响[J]. 中国有色金属学报,2021, 31 (5): 1239-1252.

Mao X D, Liu Q Y, Li L, et al. Effects of technological parameters on microstructure and properties of self-piercing riveting joints of 5182-O aluminum alloy sheets [ J]. The Chinese Journal of Nonferrous Metals, 2021, 31 (5): 1239-1252.

[13] 宋承裕, 何晓聪, 魏文杰, 等. 金属夹层对自冲铆接头强度和失效形式的影响[J]. 材料科学与工艺, 2021, 29 (2):72-77.

Song C Y, He X C, Wei W J, et al. Effect of metal interlayer on strength and failure mode of self-piercing riveting joint [J]. Materials Science and Technology, 2021, 29 (2): 72-77.

[14] 刘洋, 何晓聪, 张先炼. 钛铝异质自冲铆接头疲劳性能及失效机理[J]. 工程科学学报, 2018, 40 (4): 478-484.

Liu Y, He X C, Zhang X L. Fatigue properties and failure mechanisms of self-piercing riveted joints in titanium and aluminum alloy dissimilar sheets [J]. Chinese Journal of Engineering, 2018, 40(4): 478-484.

[15] 卢毅, 何晓聪, 王医锋, 等. 钛合金同种/ 异种板自冲铆接头静态失效机理分析[ J]. 热加工工艺, 2015, 44 ( 15):104-108.

Lu Y, He X C, Wang Y F, et al. Analysis on static failure mechanism of self-piecing riveting joints in similar and dissimilar sheets with titanium alloy [ J]. Hot Working Technology, 2015, 44

(15): 104-108.

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