Microcrack initiation and dislocation structures in an aluminium bicrystal under cyclic loading
文献类型：期刊论文
| 作者 | S. X. Li ; R. Q. Chu ; J. Y. Hou ; Z. G. Wang |
| 刊名 | Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties
 |
| 出版日期 | 1998 |
| 卷号 | 77期号:4页码:1081-1092 |
| 关键词 | copper single-crystals strain amplitudes crack initiation fatigued copper growth deformation microstructures polycrystals vector damage |
| ISSN号 | 0141-8610 |
| 中文摘要 | Tension-tension cyclic deformation of a [(1) over bar 23]-[(4) over bar 55] aluminium bicrystal with the stress axis parallel to the grain boundary (GB) was performed under load control at room temperature. At a lower stress amplitude, in the early stage of fatigue the dislocation configuration in both component crystals was characterized by an irregular cell-like structure. After 2 x 10(6) cycles, at the same lower stress amplitude, the dislocation density in some ceilings or floors of irregular cell-like structure increased, and these dislocations lined up in straight lines that corresponded to the persistent slip lines on the surfaces of the two component crystals. At an intermediate stress amplitude the irregular cell-like structure changed to a regular cell-like structure in the single-slip component [(1) over bar 23], while the irregular cell-like structure still remained in the double-slip component [(4) over bar 55]. At a higher stress amplitude the regular cell-like structure turned to a]adder-like structure in the single slip component. The microcracks were approximately parallel to the GB, and they were 3-5 mu m apart from the GB and emerged preferentially in the single slip component. A possible mechanism of microcrack initiation by voiding was suggested. |
| 原文出处 | |
| 公开日期 | 2012-04-14 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/37706]  |
| 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 | S. X. Li,R. Q. Chu,J. Y. Hou,et al. Microcrack initiation and dislocation structures in an aluminium bicrystal under cyclic loading[J]. Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties,1998,77(4):1081-1092. |
| APA | S. X. Li,R. Q. Chu,J. Y. Hou,&Z. G. Wang.(1998).Microcrack initiation and dislocation structures in an aluminium bicrystal under cyclic loading.Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties,77(4),1081-1092. |
| MLA | S. X. Li,et al."Microcrack initiation and dislocation structures in an aluminium bicrystal under cyclic loading".Philosophical Magazine a-Physics of Condensed Matter Structure Defects and Mechanical Properties 77.4(1998):1081-1092. |
入库方式： OAI收割
来源：金属研究所
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