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Development of ultrafine-grained Al 6063 alloy by cryorolling with the optimized initial heat treatment conditions
Research highlights ► Solution treated bulk Al 6063 alloys were subjected to cryorolling and room temperature rolling. ► The effects of rolling temperature and strain on the refinement of alloy are investigated. ► The heat treatment conditions are optimized by EBSD, and mechanical testing before rolling. ► The recrystallized grains with the high angle grain boundaries occur at the strain value of 3.8. ► The sub-grains are not recrystallized for the room temperature rolled samples.
Abstract The effects of rolling temperature and rolling strain on the microstructural refinement of Al 6063 alloy are investigated in the present work by employing electron back scattered diffraction (EBSD) analysis, transmission electron microscope (TEM) investigations, and X-ray diffraction (XRD) analysis. The solution treated bulk Al 6063 alloy samples are subjected to cryorolling and room temperature rolling to produce sheets with different strain levels such as 0.4, 2.3 and 3.8, respectively. Prior to cryorolling and room temperature rolling, the initial conditions such as solution treatment temperature, and sample immersion duration time, in liquid nitrogen, before cryorolling are optimized by using EBSD analysis, TEM investigations, hardness test, and tensile test. It is observed that the formation of recrystallized ultrafine-grains with the high angle grain boundaries occurs at the strain value of 3.8. However, in case of room temperature rolled samples, the sub-grains are not recrystallized even up to the strain value of 3.8.
Development of ultrafine-grained Al 6063 alloy by cryorolling with the optimized initial heat treatment conditions
Research highlights ► Solution treated bulk Al 6063 alloys were subjected to cryorolling and room temperature rolling. ► The effects of rolling temperature and strain on the refinement of alloy are investigated. ► The heat treatment conditions are optimized by EBSD, and mechanical testing before rolling. ► The recrystallized grains with the high angle grain boundaries occur at the strain value of 3.8. ► The sub-grains are not recrystallized for the room temperature rolled samples.
Abstract The effects of rolling temperature and rolling strain on the microstructural refinement of Al 6063 alloy are investigated in the present work by employing electron back scattered diffraction (EBSD) analysis, transmission electron microscope (TEM) investigations, and X-ray diffraction (XRD) analysis. The solution treated bulk Al 6063 alloy samples are subjected to cryorolling and room temperature rolling to produce sheets with different strain levels such as 0.4, 2.3 and 3.8, respectively. Prior to cryorolling and room temperature rolling, the initial conditions such as solution treatment temperature, and sample immersion duration time, in liquid nitrogen, before cryorolling are optimized by using EBSD analysis, TEM investigations, hardness test, and tensile test. It is observed that the formation of recrystallized ultrafine-grains with the high angle grain boundaries occurs at the strain value of 3.8. However, in case of room temperature rolled samples, the sub-grains are not recrystallized even up to the strain value of 3.8.
Development of ultrafine-grained Al 6063 alloy by cryorolling with the optimized initial heat treatment conditions
Panigrahi, Sushanta Kumar (Autor:in) / Jayaganthan, R. (Autor:in)
12.11.2010
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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