Formation of nano-laminated structure in nickel by means of surface mechanical grinding treatment

IMR OpenIR

	Formation of nano-laminated structure in nickel by means of surface mechanical grinding treatment
	Liu, X. C.; Zhang, H. W.; Lu, K.; lu@imr.ac.cn
	2015
发表期刊	ACTA MATERIALIA
ISSN	1359-6454
卷号	96 页码:24-36
摘要	A polycrystalline Ni (99.882% purity) bar sample was subjected to surface mechanical grinding treatment (SMGT) at ambient temperature. Gradient microstructures along depth from the treated surface were generated owing to a graded variation of strain and strain rates, including dislocation structures, submicron-sized structures, and nanostructures, respectively. In the subsurface layer of 10-80 mu m deep, 2-dimensional laminated structures with low angle boundaries and strong deformation textures were formed of which the average thickness is similar to 20 nm, one order of magnitude smaller than that of the ultrafine structures in Ni induced by conventional severe plastic deformation. The extraordinary grain refinement was ascribed to the high strain rates and high strain gradients that enhance accumulation of geometric necessary dislocations with a suppressed recovery dynamics. Deformation of the nano-laminated structures is governed by dislocation slip, and supplemented by deformation twining at the nanoscale, eventually leading to fragmentation into nano-sized equiaxed grains. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[liu, x. c. ; zhang, h. w. ; lu, k.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [lu, k.] nanjing univ sci & technol, herbert gleiter inst nanosci, nanjing 210094, jiangsu, peoples r china
关键词	Nano-laminated Structure Surface Mechanical Grinding Treatment (Smgt) Strain Gradient Nanometals
资助者	Ministry of Science and Technology of China [2012CB932201]; National Natural Science Foundation of China [51231006, 51171182]; Danish-Chinese center for Nanometals [51261130091, DNRF86-5]; Chinese Academy of Sciences [KGZD-EW-T06]
收录类别	sci
语种	英语
WOS记录号	WOS:000358459900004
引用统计	被引频次：216[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/321006/74858
专题	中国科学院金属研究所
通讯作者	lu@imr.ac.cn
推荐引用方式 GB/T 7714	Liu, X. C.,Zhang, H. W.,Lu, K.,et al. Formation of nano-laminated structure in nickel by means of surface mechanical grinding treatment[J]. ACTA MATERIALIA,2015,96:24-36.
APA	Liu, X. C.,Zhang, H. W.,Lu, K.,&lu@imr.ac.cn.(2015).Formation of nano-laminated structure in nickel by means of surface mechanical grinding treatment.ACTA MATERIALIA,96,24-36.
MLA	Liu, X. C.,et al."Formation of nano-laminated structure in nickel by means of surface mechanical grinding treatment".ACTA MATERIALIA 96(2015):24-36.