Analysis of local microstructure and hardness of 13 mm gauge 2024-T351 AA friction stir welds

被引：39

作者：

Booth, D. P. P. ^{[1
]}

Starink, M. J. ^{[1
]}

Sinclair, I. ^{[1
]}

机构：

[1] Univ Southampton, Sch Engn Sci, Mat Res Grp, Southampton SO17 1BJ, Hants, England

来源：

MATERIALS SCIENCE AND TECHNOLOGY | 2007年 / 23卷 / 03期

关键词：

friction stir weld; Al-Cu-Mg; co-clusters; precipitate; DSC; EBSD; hardness; fatigue;

D O I：

10.1179/174328407X157290

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The friction stir welding process has been used to join 13 mm gauge 2024-T351 aluminium alloy plates together. A detailed microstructural study of the resulting weld was carried out using differential scanning calorimetry, hardness testing, scanning electron microscopy and electron backscatter diffraction. Differential scanning calorimetry was used to explain the hardness results at a number of regions across the weld in terms of co-cluster dissolution and reformation and S phase formation, coarsening and dissolution. The 'onion rings' structure found in the nugget weld was shown to be the result of a combination of the slight grain size variations and a change in nature and size of the particles present, i.e. intragranular v. intergranular. The variation in corrosion properties and hardness of the rings is discussed in terms of the local microstructure and quench sensitivities.

引用

页码：276 / 284

页数：9

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