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Taguchi Optimization of FSW Parameters of 8011 Aluminium Alloy


Author(s):

Girish.G , Kongu Engineering College, Perundurai, Erode- 638052, Tamil nadu, India; Deepandurai. K, Kongu Engineering College, Perundurai, Erode- 638052, Tamil nadu, India

Keywords:

EDS, Fractography, Taguchi, Tensile strength, Traverse speed

Abstract:

In this study, mechanical and metallurgical properties of friction stir welded AA 8011 aluminium alloy are observed. A straight cylindrical hardened tool made of high speed steel is used to fabricate the joints. A simple two factorial mixed level taguchi experimental design is used to maximize the tensile strength of the friction stir welded AA 8011 aluminium alloy. Welds are made at different values of tool rotation speed and tool traverse speed and the welded specimens are subjected to tensile test and the results are evaluated. Specimen FSW4 welded at 1000 Rpm and 40 mm/min traverse speed produced a very high tensile strength of 90.99 N/mm2. Specimen FSW8 recorded the highest ductility of 28.60%. The tensile value of the specimen increases with increase in tool rotation speed and welding speed and shows a decreasing trend at higher rpm. Macro hardness and micro hardness values were measured across the transverse section of the weld joint and the values at stir zone are considerably higher than values attained at other zones. Fractography analysis is carried out on the surface of ruptured specimens to identify the nature of fracture. EDS result reveals the presence of aluminium particles in higher concentration at the fracture zone with few traces of iron and impurities.


Other Details:

Manuscript Id :IJSTEV2I10272
Published in :Volume : 2, Issue : 10
Publication Date: 01/05/2016
Page(s): 872-879
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