Relation between icosahedral short-range ordering and plastic deformation in Zr-Nb-Cu-Ni-Al bulk metallic glasses

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	Relation between icosahedral short-range ordering and plastic deformation in Zr-Nb-Cu-Ni-Al bulk metallic glasses
	Z. W. Zhu ; L. Gu ; G. Q. Xie ; W. Zhang ; A. Inoue ; H. F. Zhang ; Z. Q. Hu
刊名	Acta Materialia
	2011
卷号	59 期号:7 页码:2814-2822
关键词	Bulk metallic glasses Plastic deformation Free volume Crystallization Icosahedral short-range ordering transmission electron-microscopy room-temperature mechanical-properties amorphous-alloys compressive plasticity enhanced plasticity forming ability atomic packing free-volume composites
ISSN号	1359-6454
中文摘要	The relation between icosahedral short-range ordering (ISRO) and plastic deformation was investigated in Zr(70-x)Nb(x)Cu(13.5)Ni(8.5)Al(8) (at.%, x = 0, 2, 4, 6, 7, 8, 10) bulk metallic glasses (BMG). The formation of icosahedral quasicrystal (I-phase) during the annealing process implies that ISRO widely exists in these materials. The degree of ISRO is thermodynamically evaluated to show that ISRO increases with increasing Nb content. Compression tests indicate that BMG with 0-7 at.% Nb possess similar unusual plastic deformability, which is attributed to ISRO-mediated local distribution of free volume (FV) and ISRO prompted deformation-induced crystallization. A proposed core shell model coupled with transmission electron microscopy analysis demonstrates that the FV is distributed more heterogeneously with increasing ISRO, which is beneficial for multiplying the shear bands. Deformation-induced crystallization is facilitated, owing to the low interfacial energy of the nucleation and growth of the crystals attributed to ISRO in the amorphous matrix, which improves plasticity by consuming energy and the product altering the stress field in the amorphous matrix. Design of new ductile BMG is discussed in these strategies. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
原文出处	://WOS:000289131100024
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/31001]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Z. W. Zhu,L. Gu,G. Q. Xie,et al. Relation between icosahedral short-range ordering and plastic deformation in Zr-Nb-Cu-Ni-Al bulk metallic glasses[J]. Acta Materialia,2011,59(7):2814-2822.
APA	Z. W. Zhu.,L. Gu.,G. Q. Xie.,W. Zhang.,A. Inoue.,...&Z. Q. Hu.(2011).Relation between icosahedral short-range ordering and plastic deformation in Zr-Nb-Cu-Ni-Al bulk metallic glasses.Acta Materialia,59(7),2814-2822.
MLA	Z. W. Zhu,et al."Relation between icosahedral short-range ordering and plastic deformation in Zr-Nb-Cu-Ni-Al bulk metallic glasses".Acta Materialia 59.7(2011):2814-2822.