Fatigue Behavior of Swept Spot Friction Welds in Lap-Shear Specimens of Alclad 2024-T3 Aluminum Sheets

被引：0

作者：

Su, Zheng-Ming ^{[1
]}

He, Ru-Yi ^{[1
]}

Lin, Pal-Chen ^{[1
]}

Dong, Kent ^{[2
]}

Tang, Tony ^{[2
]}

Huang, Bob ^{[2
]}

Chiou, Yung-Chuan ^{[2
]}

机构：

[1] Natl Chung Cheng Univ, Adv Inst Mfg Hightech Innovat, Chiayi, Taiwan

[2] Aerosp Ind Dev Corp, Taichung 40760, Taiwan

来源：

TRENDS IN WELDING RESEARCH: PROCEEDINGS OF THE 9TH INTERNATIONAL CONFERENCE | 2013年

关键词：

Spot friction weld; friction stir spot weld; alclad; 2024-T3; fatigue; LIFE ESTIMATIONS; FAILURE MODES; TOOL;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Failure modes of swept spot friction welds in lap-shear specimens of alclad 2024-T3 aluminum sheets are first investigated based on experimental observations. Optical and scanning electron micrographs of the welds before and after failure under quasi-static and cyclic loading conditions are examined. Experimental results show that the failure modes of the welds under quasi-static and cyclic loading conditions are quite different. Failure modes of swept spot friction welds strongly depend on the weld geometry, microstructure, and load amplitude. A fatigue crack growth model based on the paths of the dominant kinked fatigue cracks is adopted to estimate the fatigue lives of the spot friction welds. The global and local stress intensity factors for finite kinked cracks, the stress intensity factors for finite transverse cracks, and the Paris law for fatigue crack propagation are used. The fatigue life estimations agree well with the experimental results.

引用

页码：580 / +

页数：2

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