Microstructural evolution of cast Mg-Al-Zn during friction stir processing and subsequent aging
文献类型：期刊论文
| 作者 | A. H. Feng ; Z. Y. Ma |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2009 |
| 卷号 | 57期号:14页码:4248-4260 |
| ISSN号 | 1359-6454 |
| 关键词 | Friction stir processing Magnesium alloys Recrystallization Twinning Grain refining magnesium alloy dynamic recrystallization discontinuous precipitation strengthening mechanisms chemical nanoanalysis pure magnesium grain-size deformation metals temperature |
| 中文摘要 | Mg-Al-Zn casting was subjected to two friction stir processing (FSP) protocols: single-pass with a pre-solution treatment (Pre-ST) and two-pass. Both the two-pass FSP and Pre-ST FSP produced uniform recrystallized microstructures with similar grain sizes of 7.5-8.7 mu m and high ratios of high-angle grain boundaries of 95.9-97.5%; however, the boundary misorientation distributions were quite different for the two samples. For the Pre-ST FSP sample, a significant proportion of {1 0 (1) over bar 2} twins were operative, with a complex and significantly weakened texture component. The mechanism of dynamic recrystallization (DRX) was mainly twinning DRX and continuous DRX (CDRX). However, for the two-pass FSP sample, the twins were significantly reduced, with a simple < 0 0 0 2 > texture component, and DRX was mainly associated with CDRX and discontinuous DRX A post-FSP aging resulted in the precipitation of beta-Mg(17)Al(12) phase in continuous and discontinuous forms. Most of the continuous precipitates had a Burgers orientation relationship, namely: (0001)(Mg)parallel to(1 1 0)Mg(17)Al(12), [1 (2) over bar 1 0]Mg parallel to [1 (1) over bar 1]Mg(17)Al(12). The origin of the different microstructural characteristics in the two samples was discussed. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31895]  |
| 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 | A. H. Feng,Z. Y. Ma. Microstructural evolution of cast Mg-Al-Zn during friction stir processing and subsequent aging[J]. Acta Materialia,2009,57(14):4248-4260. |
| APA | A. H. Feng,&Z. Y. Ma.(2009).Microstructural evolution of cast Mg-Al-Zn during friction stir processing and subsequent aging.Acta Materialia,57(14),4248-4260. |
| MLA | A. H. Feng,et al."Microstructural evolution of cast Mg-Al-Zn during friction stir processing and subsequent aging".Acta Materialia 57.14(2009):4248-4260. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。