Role of strain gradient on grain refinement by severe plastic deformation

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	Role of strain gradient on grain refinement by severe plastic deformation
	Y. Todaka; M. Umemoto; J. Yin; Z. G. Liu; K. Tsuchiya
	2007
发表期刊	Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN	0921-5093
卷号	462 期号:1-2 页码:264-268
摘要	The role of strain gradient on strengthening and grain refinement into nanometer scale during severe plastic deformation was studied in iron by using ball milling (BM) and high-pressure torsion (HPT) processes. Layered nanocrystalline structure with a thickness of around 100 nm or less was successfully produced by these processes. The hardness obtained by BM or HPT was more than twice as high as the maximum hardness obtained by homogeneous deformation processes such as equal-channel angular pressing, accumulative roll-bonding or cold-rolling. At the center of the HPT-processed disk, where the shear strain is theoretically zero, the hardness increased with number of turns. The results of BM and HPT experiments show clearly that the strain gradient contributes significantly to strengthening and grain refinement. (C) 2006 Elsevier B.V. All rights reserved.
部门归属	toyohashi univ technol, dept prod syst engn, tempa ku, toyohashi, aichi 4418580, japan. chinese acad sci, inst met res, shenyang 110015, peoples r china. univ waikato, dept mat & proc engn, hamilton, new zealand.;todaka, y (reprint author), toyohashi univ technol, dept prod syst engn, tempa ku, tempaku cho, toyohashi, aichi 4418580, japan;todaka@pse.tut.ac.jp
关键词	Strain Gradient Nanocrystalline Structure Severe Plastic Deformation Ball Milling High-pressure Torsion Nanocrystalline Ferrite Behavior
URL	查看原文
WOS记录号	WOS:000247038300048
引用统计	被引频次：62[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/321006/33839
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Todaka,M. Umemoto,J. Yin,et al. Role of strain gradient on grain refinement by severe plastic deformation[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2007,462(1-2):264-268.
APA	Y. Todaka,M. Umemoto,J. Yin,Z. G. Liu,&K. Tsuchiya.(2007).Role of strain gradient on grain refinement by severe plastic deformation.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,462(1-2),264-268.
MLA	Y. Todaka,et al."Role of strain gradient on grain refinement by severe plastic deformation".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 462.1-2(2007):264-268.