Fatigue behaviour of dissimilar friction stir spot welds between A6061-T6 and low carbon steel sheets welded by a scroll grooved tool without probe

被引：22

作者：

Uematsu, Y. ^{[1
]}

Tokaji, K. ^{[1
]}

Tozaki, Y. ^{[2
]}

Nakashima, Y. ^{[3
]}

Shimizu, T. ^{[4
]}

机构：

[1] Gifu Univ, Dept Mech & Syst Engn, Gifu 5011193, Japan

[2] Gifu Prefectural Res Inst Machinery & Mat, Oze, Seki 5013265, Japan

[3] ADVICS Co Ltd, Aichi 4488688, Japan

[4] Toyota Natl Coll Technol, Dept Engn Mech, Toyota 4718525, Japan

来源：

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2011年 / 34卷 / 08期

关键词：

crack growth; dissimilar weld; fatigue strength; fracture mechanism; friction stir spot welding; LAP-SHEAR SPECIMENS; FAILURE MODES; LIFE ESTIMATIONS; STAINLESS-STEEL; ALUMINUM; 5754-O; ALLOY;

D O I：

10.1111/j.1460-2695.2010.01549.x

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

A6061 and low carbon steel sheets, whose thicknesses were 2 mm, were welded by a friction stir spot welding (FSSW) technique using a scroll grooved tool without probe (scroll tool). Tensile-shear fatigue tests were performed using lap-shear specimens at a stress ratio R = 0.1, and the fatigue behaviour of dissimilar welds was discussed. Tensile-shear force of the dissimilar welds was higher than that of the A6061 similar ones. Furthermore, the dissimilar welds exhibited nearly the same fatigue strengths as the A6061 similar ones, indicating FSSW by a scroll tool was effective technique for joining aluminium to steel sheet. Fatigue fracture modes of the dissimilar welds were dependent on load levels, where shear fracture through the interface between A6061 and steel occurred at high load levels, while crack grew through A6061 sheet at low load level.

引用

页码：581 / 591

页数：11

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