Macroscopic tensile plasticity by scalarizating stress distribution in bulk metallic glass

doi:10.1038/srep21929

IMECH-IR > 非线性力学国家重点实验室

	Macroscopic tensile plasticity by scalarizating stress distribution in bulk metallic glass
	Gao M; Dong J; Huan Y(郇勇); Wang YT; Wang WH; Wang, WH (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
发表期刊	SCIENTIFIC REPORTS
	2016-02-24
卷号	6 页码:21929
ISSN	2045-2322
摘要	The macroscopic tensile plasticity of bulk metallic glasses (BMGs) is highly desirable for various engineering applications. However, upon yielding, plastic deformation of BMGs is highly localized into narrow shear bands and then leads to the "work softening" behaviors and subsequently catastrophic fracture, which is the major obstacle for their structural applications. Here we report that macroscopic tensile plasticity in BMG can be obtained by designing surface pore distribution using laser surface texturing. The surface pore array by design creates a complex stress field compared to the uniaxial tensile stress field of conventional glassy specimens, and the stress field scalarization induces the unusual tensile plasticity. By systematically analyzing fracture behaviors and finite element simulation, we show that the stress field scalarization can resist the main shear band propagation and promote the formation of larger plastic zones near the pores, which undertake the homogeneous tensile plasticity. These results might give enlightenment for understanding the deformation mechanism and for further improvement of the mechanical performance of metallic glasses.
DOI	10.1038/srep21929
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000370671100001
关键词[WOS]	AUSTENITIC STAINLESS-STEEL ; TWIN BOUNDARIES ; DEFORMATION ; DISLOCATIONS ; DUCTILITY ; ARMOR
WOS研究方向	Science & Technology - Other Topics
WOS类目	Multidisciplinary Sciences
项目资助者	The work was supported by MOST 973 of China (No. 2015CB856800) and the NSF of China (Grant No. 51271195, 5141101072, 11372323 and 11372110). The useful discussions and experimental help of D.Q. Zhao and D.W. Ding, and valuable discussions with H.Y. Bai, P. Wen and M.X. Pan are appreciated.
课题组名称	LNM实验平台
论文分区	一类
力学所作者排名	True
引用统计	被引频次：32[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/311007/58666
专题	非线性力学国家重点实验室
通讯作者	Wang, WH (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Gao M,Dong J,Huan Y,et al. Macroscopic tensile plasticity by scalarizating stress distribution in bulk metallic glass[J]. SCIENTIFIC REPORTS,2016,6:21929.
APA	Gao M,Dong J,Huan Y,Wang YT,Wang WH,&Wang, WH .(2016).Macroscopic tensile plasticity by scalarizating stress distribution in bulk metallic glass.SCIENTIFIC REPORTS,6,21929.
MLA	Gao M,et al."Macroscopic tensile plasticity by scalarizating stress distribution in bulk metallic glass".SCIENTIFIC REPORTS 6(2016):21929.

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