MECHANICAL AND CORROSION BEHAVIOUR OF FRICTION STIR WELDED AA7075 T-651 ALUMINIUM ALLOY JOINTS

Authors

  • Prabhuraj P Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar- 608002, Tamilnadu
  • Rajakumar S Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar- 608002, Tamilnadu
  • Balasubramanian V Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar- 608002, Tamilnadu
  • Sridhar K Marine Materials Department, Naval Materials Research Laboratory (NMRL), Ambernath,Mumbai
  • Lakshminarayanan A K SSNCE, Kalavakkam, Chennai.

Keywords:

Aluminium alloy, Friction stir welding, Fracture toughness , pitting corrosion

Abstract

High strength heat treatable aluminium alloy AA7075T-651 is widely used in aircraft, defence and automobile industries. However, the application of aluminium alloy in marine environment   exhibits poor corrosion performance. High strength aluminum alloys are very difficult to weld in fusion technique due to poor solidification and microstructure in nugget zone.  Friction Stir Welding is reliable technique to join aluminium alloys in solid state condition with sound weldability. In this work, rolled aluminium plate with thickness of 10 mm were square butt welded by Friction Stir Welding (FSW) process. The corrosion behavior and mechanical properties of FSW joints were investigated comparatively and in detail. The microstructure changes of substrate metal and weld nugget zone of FSW was studied using optical microscope. The mechanical behaviors such as fracture toughness, tensile strength and hardness test have been carried out in substrate and weld metal. Pitting corrosion resistant was determined by potentiodynamic polarization test. It was observed that, the mechanical properties and corrosion resistant of weld joint is lower than the base metal.

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References

Vijaya Kumar P Madhusudhan Reddy G and Srinivasa Rao K (2015), “Microstructure mechanical and corrosion behavior of high strength AA7075 aluminium alloy friction stir welds Effect of post weld heat treatment”, Defense Technology, Vol.11, 362-369.

Karaaslan A Kaya I and Atapek H (2007), “Effect of aging temperature and of retrogression Heat Treat treatment time on the microstructure and mechanical properties of alloy AA 7075”, Metal Sci., Vol. 25, 159-168.

Venugopal T Srinivasa Rao K and Prasad Rao K (2004), “Studies on friction stir welded AA7075 aluminum alloy”, Trans Indian Inst Metals, Vol. 57(6), 659-669.

Srinivasa Rao K and Prasad Rao K (2004), “Pitting corrosion of heat-treatable aluminium alloys and welds”, a review Trans Indian Inst Met, Vol.57(6), 593- 610.

Paglia C S and Buchheit R G (2008), “A look in the corrosion of aluminum alloy friction stir welds”, Scr., Mater, 358-383.

Mahoney M W Rhodes C G Flint off J G Spurling R A and Bingel W H (1998), “Properties of friction-stir-welded 7075 T651 aluminum”, Metall., Mater., Trans., A, Vol. 29, 1955–1964.

Jones M J Heurtier P Desrayaud C Montheillet F Allehaux D and Driver J H (2005), “Correlation between microstructure and micro hardness in a friction stir welded 2024 aluminium alloy”, Scr., Mater., Vol. 52, 693–697.

Sullivan J D and Robson (2008), “Microstructural properties of friction stir welded and post-weld heat-treated 7449 aluminium alloy thick plate”, Mater., Sci., Eng., A, Vol. 478, 351–360.

Genevois C Deschamps A Denquin A and Doisneau-cottignies B (2005), “Quantitative investigation of precipitation and mechanical behavior for AA2024 friction stir welds”, Acta Mater. Vol. 53, 2447–2458.

Lumsden J B Mahoney M W Rhodes C G and Pollock G A (2003), “Corrosion behavior of friction-stir-welded AA7050-T7651”, Corrosion, Vol.59, 212–219.

Frankel G S and Xia Z (1999), “Localized corrosion and stress corrosion cracking resistance of friction stir welded aluminium alloy 5454”, Corrosion, Vol. 55, 139–150.

Lumsden J B Mahoney M W Pollock G and Rhodes C G (1999), “Intergranular corrosion following friction-stir-welding of aluminium alloy 7075-T651”, Corrosion, Vol.55, 1127–1135.

Fonda R W Pao P S Jones H N and Feng C R Connolly B J and Davenport A J (2009), “Microstructure mechanical properties and corrosion of friction stir welded Al 5456”, Mater., Sci., Eng., A, Vol. 519,1–8.

Jariyaboon M Davenport A J Ambat R Connolly B J Williams S W and Price D A (2007), “The effect of welding parameters on the corrosion behavior of friction stir welded AA2024–T351”, Corrosion Science, Vol. 49, 877–909.

Squillace A De Fenzo A Giorleo G and Bellucci F (2004), “A comparison between FSW and TIG welding techniques: modifications of microstructure and pitting corrosion resistance in an AA2024-T3 butt joints”, J., Mater. Proc., Technol., Vol.152, 97–105.

Wadeson D A Zhou X Thompson G E Skeldon P Djapic L Oosterkamp and Scamans G (2006), “Corrosion behavior of friction stir welded AA7108 T79 aluminum Alloy”, Corros., Sci., Vol.48, 887–897.

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Published

2016-12-01

How to Cite

[1]
“MECHANICAL AND CORROSION BEHAVIOUR OF FRICTION STIR WELDED AA7075 T-651 ALUMINIUM ALLOY JOINTS”, JME, vol. 11, no. 4, pp. 234–238, Dec. 2016, Accessed: Oct. 04, 2024. [Online]. Available: https://smenec.org/index.php/1/article/view/193

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