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A strategy for creating ultrafine-grained microstructure in magnesium alloy sheets
- Authors
- Kim, W. J.; Lee, M. J.; Lee, B. H.; Park, Y. B.
- Issue Date
- 31-Mar-2010
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Severe plastic deformation; Differential speed rolling; Magnesium alloys; Ultrafine grains; Texture; Microstructure
- Citation
- MATERIALS LETTERS, v.64, no.6, pp.647 - 649
- Journal Title
- MATERIALS LETTERS
- Volume
- 64
- Number
- 6
- Start Page
- 647
- End Page
- 649
- ISSN
- 0167-577X
- Abstract
- An Mg-3Al-1Zn alloy with fully recrystallized microstructure and a mean grain size of 1 mu m has been produced by high-ratio differential speed rolling under the condition that the cold sheet is subjected to rolling with hot rolls preheated to 473 K, resulting in a total thickness reduction of 68% after two-step rolling. No surface or internal cracks were developed. The microstructure was homogenous along the thickness direction. A bimodal grain size distribution was obtained in which approximately 40% of the grains were ultrafine with submicron size coexisting with other grains with a size of several microns. The proposed processing method holds great potential for continuous production of ultrafine-grained magnesium alloy sheets. (C) 2009 Elsevier B.V. All rights reserved.
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Related Researcher
- Kim, Woo Jin
- Graduate School (Department of Materials Science and Engineering)