Fatigue crack growth under a constant amplitude loading of Al-6061-T6 welds obtained by modified indirect electric arc technique

被引：11
作者：
Ambriz, R. R. [1 ,2 ,3 ]
Mesmacque, G. [1 ,2 ]
Ruiz, A. [4 ]
Amrouche, A. [1 ,2 ,5 ]
Lopez, V. H. [4 ]
Benseddiq, N. [1 ,2 ]
机构：
[1] Univ Lille Nord France, F-59000 Lille, France
[2] USTL, LML, F-59650 Villeneuve Dascq, France
[3] CIITEC IPN, Inst Politecn Nacl, Azcapotzalco, DF, Mexico
[4] Univ Michoacana, Inst Invest Met, Morelia, Michoacan, Mexico
[5] Univ Artois, Arras, France
来源：
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2010年 / 15卷 / 06期
关键词：
Fatigue crack growth; Modified indirect electric arc; Friction stir welding; FRICTION STIR WELDS; ALUMINUM-ALLOYS; MICROSTRUCTURE; STRENGTH; BEHAVIOR; JOINTS; MIG;
D O I：
10.1179/136217110X12785889549589
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The characteristics of the fatigue crack growth in the base metal, weld metal and heat affected zone (HAZ) were quantified by testing compact type specimens of 6061-T6 welds obtained by the modified indirect electric arc technique. The fatigue crack growth depends on the microstructure imposed by the welding thermal cycle and it was observed that in the HAZ the crack growth rate is lower than that in the weld metal, but higher than that in the base metal. Microhardness maps revealed that this behaviour is due to the formation of a larger plastic zone around of the crack tip produced by loss of hardening. A comparison of fatigue crack growth of weld metal and HAZ for modified indirect electric arc and friction stir welding shows that the weld metal produced by friction stir welding exhibits better resistance to crack propagation, but both processes behaved similarly in the HAZ.
引用
收藏
页码：514 / 521
页数：8
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