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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
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume96Pages:24-36
AbstractA 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.
description.department[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
KeywordNano-laminated Structure Surface Mechanical Grinding Treatment (Smgt) Strain Gradient Nanometals
Funding OrganizationMinistry 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]
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/74858
Collection中国科学院金属研究所
Corresponding Authorlu@imr.ac.cn
Recommended Citation
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.
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