A microstructural investigation of the surface of a drilled hole in carbon steels
文献类型：期刊论文
| 作者 | J. G. Li ; M. Umemoto ; Y. Todaka ; K. Tsuchiya |
| 刊名 | Acta Materialia
 |
| 出版日期 | 2007 |
| 卷号 | 55期号:4页码:1397-1406 |
| 关键词 | nanocrystalline structure dynamic phase transformation severe plastic deformation drilling carbon steels ultrafine ferrite formation white layers machined surfaces worn surfaces wear transformation deformation mechanisms strain alloys |
| ISSN号 | 1359-6454 |
| 中文摘要 | The microstructure of the surface of drilled holes generated under different drilling conditions in carbon steels has been investigated. It is found that the surface microstructure depends strongly on the drilling parameters and the hardness of the matrix. White etching layers, composed of an equiaxed nanocrystalline structure layer with an average grain size of the order of several 10 nm and a submicron grained layer containing fresh martensite along the depth, formed on the hole surfaces during drilling at moderate to high cutting speed in carbon steels with high matrix hardness. The existence of a high content of austenite at the hole surface suggests that dynamic phase transformation (DPT) from body-centered cubic to face-centered cubic occurred during high-speed drilling. It is proposed that the ultrafine structure layer on the surface of a drilled hole is produced by severe plastic deformation-induced DPT together with a large strain gradient and high strain rate. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/33637]  |
| 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 | J. G. Li,M. Umemoto,Y. Todaka,et al. A microstructural investigation of the surface of a drilled hole in carbon steels[J]. Acta Materialia,2007,55(4):1397-1406. |
| APA | J. G. Li,M. Umemoto,Y. Todaka,&K. Tsuchiya.(2007).A microstructural investigation of the surface of a drilled hole in carbon steels.Acta Materialia,55(4),1397-1406. |
| MLA | J. G. Li,et al."A microstructural investigation of the surface of a drilled hole in carbon steels".Acta Materialia 55.4(2007):1397-1406. |
入库方式： OAI收割
来源：金属研究所
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