Tig Alın Kaynaklı Alüminyum Birleştirmelerin Mikroyapı ve Mekanik Özelliklerinin SKP ve T6 Isıl İşlemi Yoluyla Kaynak Sonrası Modifikasyonu Üzerine Bir Araştırma

Authors : Gökçe Mehmet GENÇER, Coşkun YOLCU, Fatih KAHRAMAN

Pages : 511-524

View : 35 | Download : 9

Publication Date : 2022-09-16

Article Type : Research Paper

Abstract :Fusion welding is a commonly applied manufacturing process in all fields of industry. Some imperfections insert ignore into journalissuearticles values(formation of coarse-grained microstructure, decrease in mechanical property, etc.); can occur especially in the fusion welding-based fabrication of aluminum alloys which have specific features, such as having high thermal conductivity, expansion coefficient, high hydrogen solubility in the liquid state, and oxide layer on the surface. Therefore, the enhancement of microstructure and mechanical properties in terms of the lifespan and strength of the fusion-welded joints is crucial for most applications. In the study, the effects of friction stir processing insert ignore into journalissuearticles values(FSP); and T6 heat treatment, applied as post-weld processing, on the weld zone properties of the gas tungsten arc welded insert ignore into journalissuearticles values(GTAWed); AA6082 plates were investigated. The effects of the post-weld processings insert ignore into journalissuearticles values(FSP and T6 heat treatment); on mechanical and microstructural features were analyzed via microstructural examination and microhardness measurements and tensile strength testing. It was observed that the dendritic microstructure in the processed region insert ignore into journalissuearticles values(stir zone); of the weld bead was destroyed and fine-grained microstructure was formed via FSP. Additionally, the findings showed that heat input occurred during FSP led to broaden of heat affected zone insert ignore into journalissuearticles values(HAZ); and decrease the hardness in a wider region. It was also determined that the mechanical characteristics of the GTAWed joint were increased but in contrast, the toughness was decreased through T6 post-weld heat treatment.
Keywords : GTA welding, aluminum alloy, Butt welding, friction stir processing, T6 heat treatment

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