The microstructure and mechanical properties of friction stir welded Al-Zn-Mg alloy in as welded and heat treated conditions

被引：117

作者：

Singh, R. K. R. ^{[1
]}

Sharma, Chaitanya ^{[1
]}

Dwivedi, D. K. ^{[1
]}

Mehta, N. K. ^{[1
]}

Kumar, P. ^{[1
]}

机构：

[1] IIT, Dept Mech & Ind Engn, Roorkee 247667, Uttarkhand, India

来源：

MATERIALS & DESIGN | 2011年 / 32卷 / 02期

关键词：

Welding; Mechanical; Heat treatments; TENSILE PROPERTIES; JOINTS; PARAMETERS; STRENGTH;

D O I：

10.1016/j.matdes.2010.08.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High strength aluminium alloys generally present low weldability because of the poor solidification microstructure, porosity in the fusion zone and loss in mechanical properties when welded by fusion welding processes which otherwise can be welded successfully by comparatively newly developed process called friction stir welding (FSW). This paper presents the effect of post weld heat treatment (T-6) on the microstructure and mechanical properties of friction stir welded 7039 aluminium alloy. It was observed that the thermo-mechanically affected zone (TMAZ) showed coarser grains than that of nugget zone but lower than that of heat affected zone (HAZ). The decrease in yield strength of welds is more serious than decrease in ultimate tensile strength. As welded joint has highest joint efficiency (92.1%). Post weld heat treatment lowers yield strength, ultimate tensile strength but improves percentage elongation. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：682 / 687

页数：6

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