Influence of tool design on mechanical properties of AZ31 friction stir spot welds

被引：58

作者：

Yin, Y. H. ^{[1
]}

Sun, N. ^{[2
]}

North, T. H. ^{[3
]}

Hu, S. S. ^{[1
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China

[2] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Changchun 130025, Peoples R China

[3] Univ Toronto, Dept Mat Sci & Engn, Toronto, ON M5S 3E4, Canada

来源：

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2010年 / 15卷 / 01期

关键词：

Friction stir spot welding; Tool geometry; Overlap shear strength; AZ31; STATIC STRENGTH; ALUMINUM-ALLOY; GEOMETRY;

D O I：

10.1179/136217109X12489665059384

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of tool design on the energy output, microstructural features and overlap shear strength properties of friction stir spot welds made of AZ31 base material is examined. The mechanical properties of AZ31 friction stir spot welds made using three-flat/threaded tools are superior to those in joints made using a tool with a threaded pin at all tool rotational speed settings. It is proposed that the failure load properties are optimised when the friction stir spot welding operation is carried out in such a manner that it produces a large bonded width, a small v/ t ratio (the height of the hook region above the sheet intersection divided by the thickness of the upper sheet) and a hook region, which is curved outwards from the tool axis.

引用

页码：81 / 86

页数：6

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