Microstructural Evolution of AA5052 Alloy Sheets in High-Speed Rolling

Toru Kazaoka; Dan Hua Zhou; Noriaki Kataoka; Ryo Matsumoto; Hiroshi Utsunomiya

doi:10.4028/www.scientific.net/AMR.922.344

Paper Titles

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Ultrasonic Spot Welding of Galvanized Steel Sheet
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The Age-Hardening Mechanism of Nanocrystalline Ni-P Alloys Synthesized by Electrodeposition
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Microstructural Evolution of AA5052 Alloy Sheets in High-Speed Rolling
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Strengthening and Toughening Mechanisms in Martensitic Steel
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Hybrid Structure of TiO₂ Nanofiber and Nanoparticle for Dye-Sensitized Solar Cells
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 922Microstructural Evolution of AA5052 Alloy Sheets...

Microstructural Evolution of AA5052 Alloy Sheets in High-Speed Rolling

Abstract:

It is known that grain refinement improves balance of strength and ductility of materials. As a technique to obtain fine-grained microstructure, dynamic recrystallization can be used in industrial processes. The authors reported that fine grains appear beneath the surface of Al-Mg alloy sheet by high-speed rolling. In this study, rolling conditions to form fine recrystallized microstructure were investigated. AA5052 alloy sheets were rolled at 500 m/min, 1000 m/min or 2000 m/min with thickness reduction of 30%, 50% or 70% at 473 K, 523 K, 573 K or 623 K. After the rolling, the sheets were water-quenched immediately. It is found that the critical strain for dynamic recrystallization is very large. For example, when the sheets are rolled at 1000 m/min and 623 K, thickness reduction greater than 76% is required for dynamic recrystallization.

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Periodical:

Advanced Materials Research (Volume 922)

Pages:

344-349

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.922.344

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Online since:

May 2014

Authors:

Toru Kazaoka, Dan Hua Zhou, Noriaki Kataoka, Ryo Matsumoto, Hiroshi Utsunomiya*

Keywords:

Al-Mg Alloy, Dynamic Recrystallization (DRX), Grain Refinement, High-Speed Rolling

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