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Comparison of Mechanical Characteristics of Friction Stir Welded Joints of AA2195 Al-Li Alloy with AA2219

Author(s):

Allan George , COLLEGE OF ENGINEERING TRIVANDRUM; Dr. Baiju Sasidharan, COLLEGE OF ENGINEERING TRIVANDRUM; Sathish Chandra Kumar, LHWC-ISRO,BENGALURU

Keywords:

Friction Stir Welding (FSW), AA2195 Al-Li Alloy AA2219

Abstract

Friction stir welding is a solid state process of joining that utilises a non consumable tool for joining two work pieces. It utilises the heat produced by friction between the rotating tool and the work piece materials . Speed of the tool(rpm), feed(mm/min) and force(kgf) are taken as the input parameters while ultimate tensile strength(MPa) is taken as the output parameter. The tool material used is QRO90 (oil hardened steel) as it has high toughness and fatigue resistance. The workpiece material used is AA2195 Al-Li alloy because of its lower density and high strength compared to other aluminium alloys. Non destructive testing methods like Phased array ultrasonic testing, Die penetrant test and X-Ray radiography tests were done to identify various defects like porosity and hot cracks. Tensile test was performed to determine the strength of the specimen. A comparative study of friction stir welded joint of AA2195 Al-Li alloy is done with friction stir welded joint of AA 2219. It was found that AA2195 Al-Li alloy offered greater ultimate tensile strength, besides being less denser as compared to friction stir welded joint of AA2219.

Other Details

Paper ID: IJSRDV7I31140
Published in: Volume : 7, Issue : 3
Publication Date: 01/06/2019
Page(s): 1705-1708

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