Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses

doi:10.1016/j.actamat.2010.12.006

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	Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses
	Jiang F; Jiang MQ(蒋敏强); Wang HF; Zhao YL; He L; Sun J; J. Sun
发表期刊	Acta Materialia
	2011
卷号	59 期号:5 页码:2057-2068
ISSN	1359-6454
其他摘要	Three-point bending experiments were performed on as-cast and annealed samples of Zr52.5Cu17.9Ni14.6Al10Ti5 (Vit105) bulk metallic glasses over a wide range of temperatures varying from room temperature (293 K) to liquid nitrogen temperature (77 K). The results demonstrated that the free volume decrease due to annealing and/or cryogenic temperature can reduce the propensity for the formation of multiple shear bands and hence deteriorate plastic deformation ability. We clearly observed a sharp ductile-to-brittle transition (DBT), across which microscopic fracture feature transfers from micro-scale vein patterns to nano-scale periodic corrugations. Macroscopically, the corresponding fracture mode changes from ductile shear fracture to brittle tensile fracture. The shear transformation zone volume, taking into account free volume, temperature and strain rate, is proposed to quantitatively characterize the DBT behavior in fracture of metallic glasses.
关键词	bulk Metallic Glass Shear Transformation Zone Tension Transformation Zone Free Volume Ductile-to-brittle Transition
学科领域	新型材料的力学问题
DOI	10.1016/j.actamat.2010.12.006
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000287775400020
课题组名称	LNM冲击动力学与新型材料力学性能
论文分区	一类
引用统计	被引频次：103[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/43313
专题	非线性力学国家重点实验室
通讯作者	J. Sun
推荐引用方式 GB/T 7714	Jiang F,Jiang MQ(蒋敏强),Wang HF,等. Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses[J]. Acta Materialia,2011,59,5,:2057-2068.
APA	Jiang F.,Jiang MQ.,Wang HF.,Zhao YL.,He L.,...&J. Sun.(2011).Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses.Acta Materialia,59(5),2057-2068.
MLA	Jiang F,et al."Shear transformation zone volume determining ductile–brittle transition of bulk metallic glasses".Acta Materialia 59.5(2011):2057-2068.

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