Transactions of Materials and Heat Treatment

Title：Influence of die-cast aluminum material stability on forming quality and mechanical properties of self-piercing riveted joints

Authors： Gu Chengbo1 Long Guangpeng1 Yu Wanyuan2 Luo Guojian3

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

KeyWords： cast aluminum alloy self-piercing riveting mechanical properties failure modes undercut value heat treatment

ClassificationCode：TG938

year,vol(issue):pagenumber：2023,48(11):124-132

Abstract：

The influences of alloy composition fluctuations in two batches of AlSi10MnMg cast aluminum alloy and different heat treatments on the forming quality and mechanical properties of self-piercing riveted joints were investigated, and eight types of steel-aluminum joints of HC340/590DP steel and AlSi10MnMg cast aluminum alloy were fabricated. The results show that the Si content of batch 1 material is higher than that of batch 2, resulting in higher tensile strength and lower elongation. In the joint profile parameters, the undercut value of batch 1 material is lower than that of batch 2, the joint shear failure modes of the two batches of material are consistent, but the failure modes of peeling and cross-tension are different. Since the tensile strength of batch 1 material is higher than that of batch 2, the joint shear peak force of batch 1 material is higher than that of batch 2, but due to the low elongation of the material, the energy absorption is lower than that of batch 2. In the peeling and cross-tension tests, the joint peak force and energy absorption of batch 2 material are better than that of batch 1 material. Thus, heat treatments can improve the forming quality and mechanical properties of self-piercing riveted joints.

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)

作者简介：顾成波（1986-），男，硕士，高级工程师，E-mail：gu_chengbo@126.com；通信作者：于万元（1987-），女，硕士，工程师，E-mail：ywy196364@126.com

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