A microstructural investigation of the surface of a drilled hole in carbon steels

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	A microstructural investigation of the surface of a drilled hole in carbon steels
	J. G. Li; M. Umemoto; Y. Todaka; K. Tsuchiya
	2007
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	55 期号:4 页码:1397-1406
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.
部门归属	toyohashi univ technol, dept prod syst engn, toyohashi, aichi 4400038, japan. chinese acad sci, dept superalloy, inst met res, shenyang 110016, peoples r china.;li, jg (reprint author), toyohashi univ technol, dept prod syst engn, toyohashi, aichi 4400038, japan;lijinguo@martens.pse.tut.ac.jp
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
URL	查看原文
WOS记录号	WOS:000244548100025
引用统计	被引频次：48[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/33637
专题	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.