Corrosion behavior of aluminum 6061 alloy joined by friction stir welding and gas tungsten arc welding methods

被引：97
作者：
Fahimpour, V. [1 ]
Sadrnezhaad, S. K. [1 ]
Karimzadeh, F. [2 ]
机构：
[1] Sharif Univ Technol, Dept Mat Sci & Engn, Tehran, Iran
[2] Isfahan Univ Technol IUT, Dept Mat Engn, Esfahan 8415683111, Iran
来源：
MATERIALS & DESIGN | 2012年 / 39卷
关键词：
PITTING CORROSION; INERT-GAS; MICROSTRUCTURE; PARAMETERS; RESISTANCE; SHEETS; FSW;
D O I：
10.1016/j.matdes.2012.02.043
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Wrought aluminum sheets with thickness of 13 mm were square butt-welded by friction stir welding (FSW) and gas tungsten arc welding (GTAW) methods. Corrosion behavior of the welding zone was probed by Tafel polarization curve. Optical metallography (OM) and scanning electron microscopy together with energy dispersive spectroscopy (SEM-EDS) were used to determine morphology and semi-quantitative analysis of the welded zone. FSW resulted in equiaxed grains of about 1-2 mu m, while GTAW caused dendritic structure of the welded region. Resistance to corrosion was greater for the FSW grains than the GTAW structure. In both cases, susceptibility to corrosion attack was greater in the welded region than the base metal section. T6 heat treatment resulted in shifting of the corrosion potential towards bigger positive values. This effect was stronger in the welded regions than the base metal section. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：329 / 333
页数：5
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