铆钉
材料科学
合金
联锁
压痕硬度
接头(建筑物)
软化
复合材料
冶金
剪切(地质)
铝
结构工程
微观结构
工程类
作者
Yunwu Ma,He Shan,Sizhe Niu,Yongbing Li,Zhongqin Lin,Ninshu Ma
出处
期刊:Engineering
[Elsevier]
日期:2021-12-01
卷期号:7 (12): 1741-1750
被引量:30
标识
DOI:10.1016/j.eng.2020.06.015
摘要
In this paper, self-piercing riveting (SPR) and friction self-piercing riveting (F-SPR) processes were employed to join aluminum alloy AA5182-O sheets. Parallel studies were carried out to compare the two processes in terms of joint macrogeometry, tooling force, microhardness, quasi-static mechanical performance, and fatigue behavior. The results indicate that the F-SPR process formed both rivet–sheet interlocking and sheet–sheet solid-state bonding, whereas the SPR process only contained rivet–sheet interlocking. For the same rivet flaring, the F-SPR process required 63% less tooling force than the SPR process because of the softening effect of frictional heat and the lower rivet hardness of F-SPR. The decrease in the switch depth of the F-SPR resulted in more hardening of the aluminum alloy surrounding the rivet. The higher hardness of aluminum and formation of solid-state bonding enhanced the F-SPR joint stiffness under lap-shear loading, which contributed to the higher quasi-static lap-shear strength and longer fatigue life compared to those of the SPR joints.
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