Intrinsic and extrinsic size effects in the deformation of amorphous CuZr/nanocrystalline Cu nanolaminates

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	Intrinsic and extrinsic size effects in the deformation of amorphous CuZr/nanocrystalline Cu nanolaminates
	W. Guo; E. Jagle; J. H. Yao; V. Maier; S. Korte-Kerzel; J. M. Schneider; D. Raabe
	2014
发表期刊	Acta Materialia
ISSN	1359-6454
卷号	80 页码:94-106
摘要	Introducing a soft crystalline phase into an amorphous alloy can promote the compound's ductility. Here we synthesized multilayered nanolaminates consisting of alternating amorphous Cu54Zr46 and nanocrystalline Cu layers. The Cu layer thickness was systematically varied in different samples. Mechanical loading was imposed by nanoindentation and micropillar compression. Increasing the Cu layer thickness from 10 to 100 am led to a transition from sharp, cross-phase shear banding to gradual bending and co-deformation of the two layer types (amorphous/nanocrystalline). Specimens with a sequence of 100 nm amorphous Cu54Zr46 and 50 nm Cu layers show a compressive flow stress of 2.57 +/- 0.21 GPa, matching the strength of pure CuZr metallic glass, hence exceeding the linear rule of mixtures. In pillar compression, 40% strain without fracture was achieved by the suppression of percolative shear band propagation. The results show that inserting a ductile nanocrystalline phase into a metallic glass prevents catastrophic shear banding. The mechanical response of such nanolaminates can be tuned by adjusting the layer thickness. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
部门归属	[guo, wei ; jaegle, eric ; 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. [maier, verena ; korte-kerzel, sandra] fau erlangen nurnberg, lehrstuhl allgemeine werkstoffeigenschaften, d-91058 erlangen, germany. [korte-kerzel, sandra] rhein westfal th aachen, inst met kunde & met phys, d-52074 aachen, germany. [yao, jiahao ; schneider, jochen m.] rhein westfal th aachen, lehrstuhl werkstoffchem, d-52074 aachen, germany. ; yao, jh (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; jhyao@imr.ac.cn ; d.raabe@mpie.de
关键词	Nanolaminates Metallic Glass Nanotwins Shear Band Bulk Metallic-glass Plasticity Finite-element In-situ Composite Mechanical-properties Crystal Plasticity Shear Bands Strain Gradients Thin-films Strength Scale
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73232
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	W. Guo,E. Jagle,J. H. Yao,et al. Intrinsic and extrinsic size effects in the deformation of amorphous CuZr/nanocrystalline Cu nanolaminates[J]. Acta Materialia,2014,80:94-106.
APA	W. Guo.,E. Jagle.,J. H. Yao.,V. Maier.,S. Korte-Kerzel.,...&D. Raabe.(2014).Intrinsic and extrinsic size effects in the deformation of amorphous CuZr/nanocrystalline Cu nanolaminates.Acta Materialia,80,94-106.
MLA	W. Guo,et al."Intrinsic and extrinsic size effects in the deformation of amorphous CuZr/nanocrystalline Cu nanolaminates".Acta Materialia 80(2014):94-106.