热门
Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure
文献类型：期刊论文
| 作者 | X. H. Shao ; Z. Q. Yang ; X. L. Ma |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2010 |
| 卷号 | 58期号:14页码:4760-4771 |
| 关键词 | Mg-Zn-Y alloy Long period stacking ordered structure Kinking Strengthening Toughening solidified mg97zn1y2 alloy deformation-behavior magnesium alloy dynamic recrystallization elevated-temperatures contraction twins room-temperature mg97y2zn1 alloy phase microstructure |
| ISSN号 | 1359-6454 |
| 中文摘要 | The deformation behavior and corresponding microstructure evolution of a Mg(97)Zn(1)Y(2) (at.%) alloy with a long period stacking ordered (LPSO) structure subjected to hot compression were investigated. The peak stress at 573 K was about 190 MPa, and no macroscopic fracture took place up to a strain of about 60%. The mechanisms responsible for the mechanical performance of the Mg(97)Zn(1)Y(2) (at.%) alloy are discussed based on microstructural investigations using various electron microscopy techniques. The high strength at elevated temperature could be attributed to synergetic strengthening refinement of the LPSO via kinking and a limited fraction of dynamical recrystallization. Microcracks nucleated at the interfaces in the sandwich structure composed of LPSO and nanometer thick Mg slices could weaken the alloy at late stages of deformation, but their propagation could be limited within the individual kink band where the microcracks nucleated, which could ensure the capability of the alloy to resist premature or catastrophic fracture. Furthermore, lack of deformation twins in Mg grains effectively reduced the potential nucleation sites for cracks, which should be another reason for the good ductility of the alloy. These findings may provide or evoke insights into methods for optimizing the mechanical properties of Mg alloys. (C) 2010 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/321006/31428]  |
| 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 | X. H. Shao,Z. Q. Yang,X. L. Ma. Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure[J]. Acta Materialia,2010,58(14):4760-4771. |
| APA | X. H. Shao,Z. Q. Yang,&X. L. Ma.(2010).Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure.Acta Materialia,58(14),4760-4771. |
| MLA | X. H. Shao,et al."Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure".Acta Materialia 58.14(2010):4760-4771. |
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。