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Effects of processing parameters on liquation cracking of 6005A alloy weldments |
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| Authors: | Jae-Ho Choi Dong Heon Lee Jongryoul Kim Dong Hyuk Shin Yong-Seog Kim |
| Affiliation: | (1) Department of Metallurgy and Materials Science, Hongik University, 72-1 Sangsu-dong, 121-791 Mapo-ku, Seoul, Korea;(2) R&D Center, Dongyang Gangchul, 273-2 Daewha-dong, 306-020 Daedeok-ku, Taejeon, Korea;(3) Department of Department of Metallurgy and Materials Engineering, Hanyang University, 1271 Sa-1-dong, 425-791 Ansan, Korea |
| Abstract: | The effects of the characteristic microstructure developed in extruded 6005A alloys on tensile properties, fatigue strength, and liquation cracking in the heat affected zone of weldments were investigated. An in-situ observation of the grain growth occurring in the sample was made with an optical microscope with a hot stage to determine the temperature of the excessive grain growth during extrusion. The extruded samples were heat treated under various conditions and welded using a gas metal are welding process. The results indicated that liquation occurred mainly at coarse grain boundaries and significantly influencing the mechanical properties of the joint. |
| Keywords: | 6005A aluminum alloy extrusion weldment liquation cracking |
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