期刊
INTERNATIONAL JOURNAL OF FATIGUE
卷 25, 期 1, 页码 77-88出版社
ELSEVIER SCI LTD
DOI: 10.1016/S0142-1123(02)00038-5
关键词
welded joints; friction stir welding; residual stress; heat affected zone; crack growth; aluminium alloys
The effects of weld residual stress and heat affected zone on the fatigue propagation of cracks parallel and orthogonal to the weld direction in friction stir welded (FSW) 2024-T351 joints were investigated. Crack propagation behaviour was sensitive to both weld orientation and the distance of the crack from the weld line. Growth rates both faster and slower than in the parent material were observed, depending on the crack orientation and distance from the weld. Weld residual stress was mechanically relieved and the effects on crack propagation observed. A comparative analysis of the results indicated that crack growth behaviour in the FSW joints was generally dominated by the weld residual stress and that microstructure and hardness changes in FSWs had a minor influence. (C) 2002 Elsevier Science Ltd. All rights reserved.
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