Transactions of Materials and Heat Treatment

Title：Influence of process parameters on forming and performance for steel-aluminum sheet self-piercing riveted joints

Authors： Luo Guojian1 Gu Chengbo2 Yu Wanyuan3 Long Guangpeng2 Li Ming1

Unit： 1.School of Mechanical and Automotive Engineering Guangxi University of Science and Technology 2.AISN Innovative Design and Manufacturing Co. Ltd. 3.College of Automotive Engineering Liuzhou Vocational & Technical College

KeyWords： AlSi10MnMg-T7 cast aluminum self-piercing riveting forming quality failure mode energy absorption

ClassificationCode：TG938

year,vol(issue):pagenumber：2023,48(12):48-56

Abstract：

Self-piercing riveted joints were prepared by using a combination of HC340/590DP advanced high-strength steel and AlSi10MnMg-T7 cast aluminum material, and the mechanical response of different types of rivet lengths and hardnesses to the riveted joints formed by steel-aluminum dissimilar materials was investigated. The results show that the defined parameters have a significant impact on the riveting quality and mechanical response. Under the combination state that the upper steel plate thickness is smaller or the rivet hardness is H5, the failure mode of joint is that the lower plate comes out, and under the combination state that the rivet hardness is H6, the failure mode of joint is mostly the rivet breakage. Combining with the failure mode and mechanical properties, it is found that rivet fracture significantly reduces the level of energy absorption, and the failure loads of joints using the rivet with the length of 6.0 mm are above 7.3 kN. As the length of rivet increases, the nail body area acting between plates increases, and when the unit load remains unchanged, the failure load shows an increasing trend. When the underlying aluminum plate of joint combination is thicker or the rivet hardness is H5, the energy absorption performance is outstanding, and the level of energy absorption increases with the increase of plate thickness.

Funds：

中央引导地方项目(桂科ZY21195006)；广东省重点领域研发计划项目(2022B0909070001)；高性能铝合金超轻量化材料及汽车总成产品的研发与产业化示范项目（桂科AB23026104）

作者简介：罗国健（1996-），男，硕士研究生 E-mail：1872558980@qq.com 通信作者：顾成波（1986-），男，硕士，高级工程师 E-mail：gu_chengbo@126.com

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