The influence of zigzag-curve defect on the fatigue properties of friction stir welds in 7075-T6 Al alloy

被引：47
作者：
Di, Shusheng
Yang, Xinqi [1 ]
Fang, Dapeng
Luan, Guohong
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, Tianjin 300072, Peoples R China
[2] China FSW Ctr Beijing FSW Technol Limited Co, Beijing 100024, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2007年 / 104卷 / 2-3期
关键词：
friction stir welding; zigzag-curve defects; fatigue strength;
D O I：
10.1016/j.matchemphys.2007.01.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and fatigue properties of friction stir welded joints of 7075-T6 Al alloy were discussed. It was shown that the zigzag-curve defect at the root of welds is the key factor to reduce the fatigue performance of single-sided friction stir welded joints of 7075-T6 high strength aluminum alloy. On the other hand, the FSW joints of 7075-T6 Al alloy achieved higher fatigue strength compared to the traditional fusion design curves IIW FAT40 and Draft Eurocode 9 design category 55-6 for structural aluminum alloy components. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：244 / 248
页数：5
相关论文
共 20 条
[1]   Mechanical and microstructural behaviour of 2024-7075 aluminium alloy sheets joined by friction stir welding [J].
Cavaliere, P ;
Nobile, R ;
Panella, FW ;
Squillace, A .
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE, 2006, 46 (06) :588-594
[2]   Comparative study on fatigue properties between AA2024-T4 friction stir welds and base materials [J].
Di, Shusheng ;
Yang, Xinqi ;
Luan, Guohong ;
Jian, Bo .
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2006, 435 :389-395
[3]   Fatigue of friction stir welds in aluminium alloys that contain root flaws [J].
Dickerson, TL ;
Przydatek, J .
INTERNATIONAL JOURNAL OF FATIGUE, 2003, 25 (12) :1399-1409
[4]   Influence of welding speed on the fatigue of friction stir welds, and comparison with MIG and TIG [J].
Ericsson, M ;
Sandström, R .
INTERNATIONAL JOURNAL OF FATIGUE, 2003, 25 (12) :1379-1387
[5]  
ERICSSON M, 2000, 2 INT S FSW GOTH SWE
[6]  
HAGSTROM J, 1996, KTHAMT168
[7]   Weld tool travel speed effects on fatigue life of friction stir welds in 5083 aluminium [J].
James, MN ;
Hattingh, DG ;
Bradley, GR .
INTERNATIONAL JOURNAL OF FATIGUE, 2003, 25 (12) :1389-1398
[8]   On the fatigue behaviour and design curves of friction stir butt-welded Al alloys [J].
Lomolino, S ;
Tovo, R ;
dos Santos, J .
INTERNATIONAL JOURNAL OF FATIGUE, 2005, 27 (03) :305-316
[9]   Review of fatigue assessment procedures for welded aluminium structures [J].
Maddox, SJ .
INTERNATIONAL JOURNAL OF FATIGUE, 2003, 25 (12) :1359-1378
[10]  
MAGNUSSON L, 2000, 2 INT S FSW GOT SWED
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