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Deformation induced alloying in crystalline - metallic glass nano-composites
W.; Yao Guo, J.; Jagle, E. A.; Choi, P. P.; Herbig, M.; Schneider, J. M.; Raabe, D.
2015
Source PublicationMaterials Science and Engineering a-Structural Materials Properties Microstructure and Processing
ISSN0921-5093
Volume628Pages:269-280
AbstractWe study the mechanisms of deformation driven chemical mixing in a metallic nanocomposite model system. More specific, we investigate shear banding at the atomic scale in an amorphous CuZr/crystalline Cu nanolaminate, deformed by microindentation. Three CuZr/Cu multilayer systems (100 nm Cu/100 nm CuZr, 50 nm Cu/100 nm CuZr, and 10 nm Cu/100 rim CuZr) are fabricated to study the effect of layer thickness on shear band formation and deformation induced alloying. The chemical and structural evolution at different strain levels are traced by atom probe tomography and transmission electron microscopy combined with nano-beam diffraction mapping. The initially pure crystalline Cu and amorphous CuZr layers chemically mix by cross-phase shear banding after reaching a critical layer thickness. The Cu inside the shear bands develops a high dislocation density and can locally undergo transition to an amorphous state when sheared and mixed. We conclude that the severe deformation in the shear bands in the amorphous layer squeeze Zr atoms into the Cu dislocation cores in the Cu layers (thickness <5 nm), resulting in local chemical mixing. (C) 2015 Elsevier B.V. All rights reserved.
description.department[guo, wei ; jaegle, eric a. ; choi, pyuck-pa ; herbig, michael ; raabe, dierk] max planck inst eisenforsch gmbh, dept microstruct phys & alloy design, d-40237 dusseldorf, germany. [yao, jiahao] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [schneider, jochen m.] rhein westfal th aachen, lehrstuhl werkstoffchem, d-52074 aachen, germany. ; guo, w (reprint author), max planck inst eisenforsch gmbh, dept microstruct phys & alloy design, d-40237 dusseldorf, germany. ; wguo2007@gmail.com
KeywordDeformation Induced Alloying Multilayers Nanocrystalline Metallic Glass Shear Band Atom Probe Tomography Mechanical-behavior Orientation Dependence Specimen Preparation Single-crystals Self-diffusion Length-scale Shear Bands Cu-ag Copper Multilayers
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/73809
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
W.,Yao Guo, J.,Jagle, E. A.,et al. Deformation induced alloying in crystalline - metallic glass nano-composites[J]. Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,2015,628:269-280.
APA W..,Yao Guo, J..,Jagle, E. A..,Choi, P. P..,Herbig, M..,...&Raabe, D..(2015).Deformation induced alloying in crystalline - metallic glass nano-composites.Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing,628,269-280.
MLA W.,et al."Deformation induced alloying in crystalline - metallic glass nano-composites".Materials Science and Engineering a-Structural Materials Properties Microstructure and Processing 628(2015):269-280.
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