Salt fog corrosion behavior of friction stir welded AA2014-T651 aluminum alloy

被引:10
作者
Thamilarasan, Kollapuri [1 ]
Rajendraboopathy, Sadayan [2 ]
Reddy, Gankidi Madhusudhan [3 ]
Rao, Tadivaka Srinivasa [4 ]
Rao, Sajja Rama Koteswara [5 ]
机构
[1] New Prince Shri Bavani Coll Engn & Technol, Mech Engn, Chennai 600073, Tamil Nadu, India
[2] Anna Univ, Dept Mech Engn, Chennai, Tamil Nadu, India
[3] Def Met Res Lab, Met Joining Grp, Hyderabad, Andhra Pradesh, India
[4] KKR & KSR Inst Technol & Sci, Dept Mech Engn, Guntur, India
[5] SSN Coll Engn, Dept Mech Engn, Chennai, Tamil Nadu, India
关键词
AA2014-T651 aluminum alloy; Friction stir welding; Corrosion; Microstructures; Transmission electron microscopy; MECHANICAL-PROPERTIES; CRACKING RESISTANCE; ASSISTED CRACKING; PITTING CORROSION; T651; ALUMINUM; MICROSTRUCTURE; STRENGTH; STABILITY; JOINTS; FSW;
D O I
10.3139/120.110941
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
High strength aluminum alloys of type AA2014 are used in aerospace applications. This alloy is considered unweldable using fusion welding processes. Friction stir welding being a solid state process has been proved to be a suitable process for obtaining sound welds of these materials. In the current study, 8 mm thick rolled AA2014-T651 aluminum alloy plates were joined using friction stir welding. The corrosion behavior of base material and friction stir welds was investigated using the salt fog test (ASTM B117). The corrosion resistance of the welds and parent material in the basic solution was found to be better than that in acidic and neutral solutions. It was also found that the corrosion rate increases with increase in time of exposure. It has been observed that corrosion attack is greater in the weld region than in the parent material and within the weld, heat affected zone has been found to be more susceptible to corrosion compared to the weld nugget and thermomechanically affected zone regions. Transmission electron microscopy studies revealed coarser precipitates and precipitate-free zones in the heat affected zone which are concluded to be the reasons for more susceptibility to corrosion.
引用
收藏
页码:932 / 938
页数:7
相关论文
共 35 条
[1]  
Ambat R., 2002, P 15 INT CORR C GRAN, P2282
[2]  
[Anonymous], 2003, B117 ASTM
[3]  
[Anonymous], 2003, G1 ASTM
[4]  
CONNOLLY BJ, 2004, P 5 INT FRICT STIR W
[5]   Corrosion of friction-stir welded aluminum alloys 2024 and 2195 [J].
Corral, J ;
Trillo, EA ;
Li, Y ;
Murr, LE .
JOURNAL OF MATERIALS SCIENCE LETTERS, 2000, 19 (23) :2117-2122
[6]   Localized corrosion and stress corrosion cracking resistance of friction stir welded aluminum alloy 5454 [J].
Frankel, GS ;
Xia, Z .
CORROSION, 1999, 55 (02) :139-150
[7]  
Hannour F., 2000, P 2 INT S FRICT STIR, DOI [10.1108/aa.2000.03320bab.005, DOI 10.1108/AA.2000.03320BAB.005]
[8]  
Hannour F., 2000, P 2 INT S FRICT STIR
[9]  
Hassan K. A. A., 2001, P 3 INT S FRICT STIR, DOI [10.1179/136217103225005480, DOI 10.1179/136217103225005480]
[10]   Effect of welding parameters on nugget zone microstructure and properties in high strength aluminium alloy friction stir welds [J].
Hassan, KAA ;
Prangnell, PB ;
Norman, AF ;
Price, DA ;
Williams, SW .
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING, 2003, 8 (04) :257-268