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http://dx.doi.org/10.5781/JWJ.2016.34.4.34

Analysis of Microstructure and Mechanical Properties According to Heat Treatment Conditions in GMAW for Al 6061-T6 Alloy  

Kim, Chan Kyu (Dept. of Mechanical Engineering, Changwon National University)
Cho, Young Tae (Dept. of Mechanical Engineering, Changwon National University)
Jung, Yoon Gyo (Dept. of Mechanical Engineering, Changwon National University)
Kang, Shin Hyun (EMKorea)
Publication Information
Journal of Welding and Joining / v.34, no.4, 2016 , pp. 34-39 More about this Journal
Abstract
Recently, aluminum alloy has used various industry, such as automobile, shipbuilding and aircraft because of characteristics of low density and high corrosion resistance. Al 6061-T6 is heat treatment materials so it has high strength and mostly used for assembly by mechanical fastening such as a bolting and riveting. In GMA (Gas Metal Arc) welding of alloy, some defects which are hot cracking, porosity, low-mechanical properties and large heat affected zone is generated, because of high heat conductivity. It reduces mechanical properties. In this study, the major factor effected on properties are analyzed after welding in Al 6061-T6 in GMAW, then optimize heat treatment conditions. Plate of Al 6061-T6 with a thickness of 12 mm is welded in V groove and applied welding method is butt joint. Mechanical properties and microstructure are analyzed according to heat treatment condition. Tensile strength, microstructure and Hardness are evaluated. Result of research appears that Al 6061-T6 applied heat treatment show outstanding mechanical properties.
Keywords
Al 6061-T6 alloy; GMAW; Heat-treatment; Taguchi method;
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