The ductile to brittle transition behavior in a Zr-based bulk metallic glass

doi:10.1016/j.msea.2014.11.088

IMECH-IR > 非线性力学国家重点实验室

	The ductile to brittle transition behavior in a Zr-based bulk metallic glass
	Li G; Jiang MQ(蒋敏强); Jiang F; He L; Sun J; Jiang, F (reprint author), Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China.
发表期刊	Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
	2015-02-11
卷号	625 页码:393-402
ISSN	0921-5093
摘要	The ductile to brittle transition (DBT) of crystalline metals and alloys has been extensively studied in scientific and engineering fields. However, the DBT of non-crystalline metals and alloys such as bulk metallic glasses (BMGs) remains poorly characterized and understood. Here, the DBT behavior of a Zr-based (Zr52.5Cu17.9Ni14.6Al10Ti5) BMG as a model material was systematically investigated at various temperatures and different free volume states using uniaxial tensile and compression tests. A significant DBT was confirmed by the observations of the transition of macroscopic fracture modes from shear to tension as well as microscopic fracture surface features from micron-scale vein pattern to nano-scale dimples/periodic corrugations. It is revealed that the former is determined by the intrinsic competition between the critical shear and normal stresses, and the latter is due to the competition between ductile shear banding and brittle cracking. Within the framework of the cooperative shear model of shear transition zones (STZs), a DBT map for metallic glasses is proposed in terms of STZ versus tension transition zone (TTZ), depending on free volume, temperature and strain rate. (C) 2014 Elsevier B.V. All rights reserved.
关键词	Ductile To Brittle Transition Bulk Metallic Glass Fracture Shear Band
学科领域	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
DOI	10.1016/j.msea.2014.11.088
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000349579000047
项目资助者	The financial support from the National Natural Science Foundation of China (NSFC) under Grant nos. 51171138, 11372315 and 51321003 are gratefully acknowledged. The work was supported by Ph.D. Programs Foundation of Ministry of Education of China (20110201110002).
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：26[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/311007/49623
专题	非线性力学国家重点实验室
通讯作者	Jiang, F (reprint author), Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China.
推荐引用方式 GB/T 7714	Li G,Jiang MQ,Jiang F,et al. The ductile to brittle transition behavior in a Zr-based bulk metallic glass[J]. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing,2015,625:393-402.
APA	Li G,Jiang MQ,Jiang F,He L,Sun J,&Jiang, F .(2015).The ductile to brittle transition behavior in a Zr-based bulk metallic glass.Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing,625,393-402.
MLA	Li G,et al."The ductile to brittle transition behavior in a Zr-based bulk metallic glass".Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 625(2015):393-402.

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