A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Microstructure and mechanical properties of friction stir welded 6082 AA in as welded and post weld heat treated conditions
Highlights ► FSW of 6082 AA using different feed rates and rotational speeds was conducted. ► Post weld heat treatment (PWHT) is influential in recovering the joint’s strength. ► The grain size for all welding conditions ranged from 2.3 to 2.8μm. ► PWHT resulted in changing the main texture components.
Abstract Friction stir welding of 6082 AA-T651 was performed using three different combinations of feed rates (90, 140 and 224mm/min) and tool rotational speeds (850, 1070 and 1350rpm). Mechanical properties of the weldments were evaluated by hardness measurements on the transverse section and tensile testing, while microstructure evaluation was done by optical microscopy and electron back scattered diffraction (EBSD). Irrespective to welding parameters the dynamically recrystallized grains in the stir zone were measured to be in the range of 2–3μm for different feeds rates and rotational speeds. A considerable loss in hardness in the stir zone and more severely in the thermo-mechanically affected zone was noted due to dissolution of β′ and β″ second phase particles. A post weld heat treatment (PWHT) of 175°C for 5 and 12h was given to the weldments for all welding conditions and the mechanical properties and microstructure were re-evaluated. The hardness and strength were partially recovered and this was attributed to the possible re-precipitation of the β″ precipitates. The grain size barely exhibited a change, whereas the texture displayed a significant diminish in the Goss orientation after PWHT.
Microstructure and mechanical properties of friction stir welded 6082 AA in as welded and post weld heat treated conditions
Highlights ► FSW of 6082 AA using different feed rates and rotational speeds was conducted. ► Post weld heat treatment (PWHT) is influential in recovering the joint’s strength. ► The grain size for all welding conditions ranged from 2.3 to 2.8μm. ► PWHT resulted in changing the main texture components.
Abstract Friction stir welding of 6082 AA-T651 was performed using three different combinations of feed rates (90, 140 and 224mm/min) and tool rotational speeds (850, 1070 and 1350rpm). Mechanical properties of the weldments were evaluated by hardness measurements on the transverse section and tensile testing, while microstructure evaluation was done by optical microscopy and electron back scattered diffraction (EBSD). Irrespective to welding parameters the dynamically recrystallized grains in the stir zone were measured to be in the range of 2–3μm for different feeds rates and rotational speeds. A considerable loss in hardness in the stir zone and more severely in the thermo-mechanically affected zone was noted due to dissolution of β′ and β″ second phase particles. A post weld heat treatment (PWHT) of 175°C for 5 and 12h was given to the weldments for all welding conditions and the mechanical properties and microstructure were re-evaluated. The hardness and strength were partially recovered and this was attributed to the possible re-precipitation of the β″ precipitates. The grain size barely exhibited a change, whereas the texture displayed a significant diminish in the Goss orientation after PWHT.
Microstructure and mechanical properties of friction stir welded 6082 AA in as welded and post weld heat treated conditions
El-Danaf, Ehab A. (author) / El-Rayes, Magdy M. (author)
2012-10-17
12 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2013
Fatigue of Friction Stir Welded AlMgSi-Alloy 6082
| British Library Online Contents | 2000
| British Library Online Contents | 2007
| British Library Online Contents | 2011