Microstructural evolution in recrystallized and unrecrystallized Al-Mg-Sc alloys during superplastic deformation
文献类型：期刊论文
| 作者 | F. C. Liu ; P. Xue ; Z. Y. Ma |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2012 |
| 卷号 | 547页码:55-63 |
| 关键词 | Aluminum alloys Superplasticity Friction sir processing Grain boundaries Texture low-temperature superplasticity zr alloy dynamic recrystallization polycrystalline materials boundary diffusion grain-boundaries aluminum-alloys strain model behavior |
| ISSN号 | 0921-5093 |
| 中文摘要 | The microstructural evolution of unrecrystallized (extruded) and recrystallized (friction stir processed, FSP)Al-Mg-Sc alloys during superplastic straining was investigated using electron backscatter diffraction (EBSD). The unrecrystallized structure gradually transformed into a recrystallized structure, characterized by equiaxed grains, random boundary misorientation distribution and a weak texture at high strains. This evolution was divided into three stages based on true stress-strain curves and EBSD maps, i.e. subgrain rotation and coalescence in the early stage, dynamic recrystallization in the middle stage, and grain boundary sliding (CBS) and dynamic grain growth in the final stage. By comparison, the recrystallized grains in the FSP Al-Mg-Sc maintained a random distribution during the whole deformation process, however the grain size increased significantly with increasing strain, indicating that the main deformation mechanism was always GBS and dynamic grain growth. A deformation model was proposed to explain the microstructural evolution during superplastic deformation. The microstructure with the random boundary misorientations reaches a dynamic balance because the transformation between high-angle grain boundaries and low-angle grain boundaries is equivalent. (C) 2012 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60106]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | F. C. Liu,P. Xue,Z. Y. Ma. Microstructural evolution in recrystallized and unrecrystallized Al-Mg-Sc alloys during superplastic deformation[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2012,547:55-63. |
| APA | F. C. Liu,P. Xue,&Z. Y. Ma.(2012).Microstructural evolution in recrystallized and unrecrystallized Al-Mg-Sc alloys during superplastic deformation.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,547,55-63. |
| MLA | F. C. Liu,et al."Microstructural evolution in recrystallized and unrecrystallized Al-Mg-Sc alloys during superplastic deformation".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 547(2012):55-63. |
入库方式： OAI收割
来源：金属研究所
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