Microstructural and Mechanical Properties of FSW Joints Between AA6101-T6 and AA6351-T6 Dissimilar Al Alloys

Technical Paper
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Abstract

Friction stir welding of AA6101-T6 and AA6351-T6 dissimilar Aluminium alloys has been carried out at constant welding speed using a tapered cylindrical threaded tool pin with varying rotational speed. Change in microstructure and hardness near heat affected zone, nugget zone, and Thermo mechanically affected zone have been examined. Tensile tests results showed that the minimum loss of yield strength and ultimate tensile strength with minimised microstructural distortion in the weld correspond to 1100 r.p.m of tool speed. Electron probe micro analysis with energy dispersive spectroscopy result shows that the breakdown of inter granular precipitate of Mg2Si is found to be equiaxed and it minimizes the heat affected zone, thus attributing to the increase of strength compared to welded joints of 900 and 1300 r.p.m tool speed. The mass% of Si decreases with increase in tool speed and forms finer Mg2Si precipitates that attributes to reduction in strength with fibrous fracture appearance.

Keywords

Friction stir welding Microstructure Rotational speed Micro hardness Tensile strength 

References

  1. 1.
    Kumbhar N T, Dey G K, and Bhanumurthy K, BARC Newsl 321 (2011) 11.Google Scholar
  2. 2.
    Leal R M, Leitao C, Loureiro A, Rodrigues D M, and Vilaca P, Mater Sci Eng A 498 (2008) 384.CrossRefGoogle Scholar
  3. 3.
    Peel M J, Steuwer A, Withers P J, Dickerson T, Shi Q, and Shercliff H, Metall Trans A 37 (2006) 2183.CrossRefGoogle Scholar
  4. 4.
    Peel M J, Steuwer A, and Withers P J, Metall Trans A 37 (2006) 2195.CrossRefGoogle Scholar
  5. 5.
    Elangovan K, Balasubramanian V, and Valliappan M, Mater Manuf Process 23 (2008) 251.CrossRefGoogle Scholar
  6. 6.
    Elangovan K, and Balasubramanian V, Mater Des 29 (2008) 362.Google Scholar
  7. 7.
    Elangovan K, Balasubramanian V, and Valliappan M, Int J Adv Manuf Technol 38 (2008) 285.CrossRefGoogle Scholar
  8. 8.
    Gupta A K, Lloyd D J, and Court S A, Mater Sci Eng A 301 (2001) 140.CrossRefGoogle Scholar
  9. 9.
    Gupta A K, Lloyd D J, and Court S A, Mater Sci Eng A 316 (2001) 11.CrossRefGoogle Scholar
  10. 10.
    Ouyang J H, Kovacevic R, J Mater Eng Perform 11 (2002) 51.CrossRefGoogle Scholar
  11. 11.
    Cavaliere P, Nobile R, Anella F W, and Squillace A, Int J Mach Tools Manuf 46 (2006) 588.Google Scholar
  12. 12.
    Khodir S A, and Shibayanagi T, Sci Eng B 148 (2008) 82.CrossRefGoogle Scholar
  13. 13.
    Aval H J, Serajzadeh S, Kokabi A H, and Loureiro A, Sci Technol Weld Join 16 (2011) 597.CrossRefGoogle Scholar
  14. 14.
    Palanivel R, and Koshymathews P, Trans Nonferrous Met Soc China 24 (2014) 58.CrossRefGoogle Scholar
  15. 15.
    Yeswanth Kumar Y, Kumar A, and Rajyalakshmi, Int J Curr Eng Technol 4 (2014) 4144.Google Scholar

Copyright information

© The Indian Institute of Metals - IIM 2017

Authors and Affiliations

  1. 1.Department of Manufacturing EngineeringNational Institute of Foundry and Forge TechnologyHatia, RanchiIndia
  2. 2.Advanced Materials Technology DepartmentCSIR -Institute of Minerals and Materials TechnologyBhubaneswarIndia

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