Cyclic deformation and dynamic compressive properties of copper bicrystals
文献类型：期刊论文
| 作者 | R. Q. Yang ; S. X. Li ; Z. F. Zhang |
| 刊名 | Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
 |
| 出版日期 | 2007 |
| 卷号 | 466期号:1-2页码:207-217 |
| 关键词 | copper bicrystal grain boundary cyclic straining EBSD dynamic deformation lattice rotation adiabatic shear bands adiabatic shear bands intergranular fatigue cracking double slip orientation aisi 4340 steel single-crystals plastic-deformation grain-boundaries stereographic triangle dislocation-structures ballistic impact |
| ISSN号 | 0921-5093 |
| 中文摘要 | Cyclic deformation and dynamic compressive tests of three copper bicrystals were carried out on a Shimadzu servo-hydraulic testing machine and a split Hopkinson pressure bar (SHPB) apparatus respectively. The post-deformation dislocation structures, grain boundary (GB) serrations and adiabatic shear bands (ASBs) were examined using electron channeling contrast (ECC) imaging in a scanning electron microscope (SEM). After cyclic straining the secondary slip bands were activated near the GB forming a GB affected zone (GBAZ). Microstructures beneath it are dislocation labyrinth or irregular persistent slip bands (PSBs). The saturation stress at GBAZ was calculated to be higher than that in the grain interior. In dynamic compression, the formation of ASBs, was found to be promoted by the GB. Dynamic stress-strain curves were compared with each other for single crystals, bicrystals and polycrystals. Microstructures were also characterized with orientation imaging microscopy (OIM) by electron backscattering diffraction (EBSD) technique. It was found that relatively larger lattice rotations occurred across the ASBs than in the other regions, which can be deduced by the localization of simple shear along ASBs. No recrystallization was found in the ASBs or along GBs in the present circumstance. (c) 2007 Elsevier B.V. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33974]  |
| 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 | R. Q. Yang,S. X. Li,Z. F. Zhang. Cyclic deformation and dynamic compressive properties of copper bicrystals[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2007,466(1-2):207-217. |
| APA | R. Q. Yang,S. X. Li,&Z. F. Zhang.(2007).Cyclic deformation and dynamic compressive properties of copper bicrystals.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,466(1-2),207-217. |
| MLA | R. Q. Yang,et al."Cyclic deformation and dynamic compressive properties of copper bicrystals".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 466.1-2(2007):207-217. |
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。