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Synthesis of ultra high strength Al-Mg-Si alloy sheets by differential speed rolling
- Authors
- Kim, W. J.; Wang, J. Y.; Choi, S. O.; Choi, H. J.; Sohn, H. T.
- Issue Date
- 15-Sep-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Severe plastic deformation; Rolling; Aluminum alloys; Grain refining; High strength
- Citation
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, v.520, no.1-2, pp.23 - 28
- Journal Title
- MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
- Volume
- 520
- Number
- 1-2
- Start Page
- 23
- End Page
- 28
- ISSN
- 0921-5093
- Abstract
- The ultrafine-grained Al-Mg-Si alloy sheets, which were fabricated by severe plastic deformation (SPD) using a high-speed-ratio differential speed rolling (HRDSR) and subsequent low temperature aging, exhibited an ultra high strength (yield stress: 455 MPa, ultimate tensile strength: 489 MPa). The strengthening effect was impressive compared with the results obtained by using other SPD techniques. The achievement could be attributed to formation of very fine grains due to significantly increased dislocation density in solute supersaturated matrix, high Hall-Petch constant and particle strengthening gained by formation nano-scale precipitates during the low temperature aging after the HRDSR process. (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)