Structure refinement of pure Mg under pulsed magnetic field
文献类型：期刊论文
| 作者 | B. Wang ; Y. S. Yang ; J. Zhou ; W. Tong |
| 刊名 | Materials Science and Technology
 |
| 出版日期 | 2011 |
| 卷号 | 27期号:1页码:176-179 |
| 关键词 | Structure refinement Pulsed magnetic field Pure Mg Solidification electromagnetic vibrations microstructural refinement magnesium alloys al aluminum billets |
| ISSN号 | 0267-0836 |
| 中文摘要 | A pulsed magnetic field (PMF) was introduced into the solidification of pure Mg. Fine uniform equiaxed grains are acquired in the whole ingot from the PMF treatment, in contrast with the coarse columnar grains observed in conventional casting, and the average grain size is refined to 260 mu m with a 200 V PMF treatment. Pulsed magnetic field increases melt convection during solidification, and the violent agitation causes warmer liquid to fracture the tip of columnar dendrites or to break off dendrite branches to promote the formation of an equiaxed structure, with the broken pieces transported into the bulk liquid acting as nuclei. In addition, the uniform temperature field resulting from the stirring increases the likelihood of nuclei survival. The Joule heat effect also participates in the structure refinement. The pure Mg produced with a 200 V PMF treatment exhibits improved mechanical properties, such as the ultimate compressive strength (227 MPa) and fracture strain (33.2%). |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30716]  |
| 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 | B. Wang,Y. S. Yang,J. Zhou,et al. Structure refinement of pure Mg under pulsed magnetic field[J]. Materials Science and Technology,2011,27(1):176-179. |
| APA | B. Wang,Y. S. Yang,J. Zhou,&W. Tong.(2011).Structure refinement of pure Mg under pulsed magnetic field.Materials Science and Technology,27(1),176-179. |
| MLA | B. Wang,et al."Structure refinement of pure Mg under pulsed magnetic field".Materials Science and Technology 27.1(2011):176-179. |
入库方式： OAI收割
来源：金属研究所
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