Balancing strength and ductility of cylindrical-shaped Cu64Zr36 nanoglass via embedded Cu nanocrystals

doi:10.1016/j.jnoncrysol.2020.120211

	Balancing strength and ductility of cylindrical-shaped Cu64Zr36 nanoglass via embedded Cu nanocrystals
	Cai, B.2; Wang, D.2; Gao, N.1,3,4; Li, J. H.2; Lai, W. S.2; Liu, J. B.2; Liu, B. X.2
刊名	JOURNAL OF NON-CRYSTALLINE SOLIDS
	2020-09-15
卷号	544 页码:6
关键词	Nanoglass/crystalline composite Tension High-strength Large-ductility Molecular dynamic simulation
ISSN号	0022-3093
DOI	10.1016/j.jnoncrysol.2020.120211
通讯作者	Liu, J. B.(jbliu@mail.tsinghua.edu.cn)
英文摘要	Large-plasticity can be realized in nanoglass at the expense of strength, and such a loss can be compensated by embedding stronger nanocrystals. Here, the effects of average grain size (D-average) and volume fraction of nanocrystalline (phi) on deformation behaviors of cylindrical-shaped Cu64Zr36 nanoglass/crystalline Cu composites (NGCCs) are investigated by molecular dynamics simulations of tensile loading. Our results reveal that the necking behavior of NGCCs persistently starts from the glass grains, followed by the glass fracture. In particular, there exists a critical D-average of 7.96 nm, which is related to the diameter of nanowires. With D-average larger than the critical value, NGCCs are more likely to achieve both high-strength and large-ductility in comparison with their NG counterparts. It also confirms the significance of the surface effect on stretching NGCC nanowires. As the volume fraction of the Cu nanograins increases, the peak stress of NGCCs increases while the ductility decreases. Therefore, the tweaking of appropriate D-average and phi makes it possible to overcome the long-term strength-ductility trade-off dilemma.
资助项目	National Key Research and Development Program of China[2017YFB0702301] ; National Key Research and Development Program of China[2017YFB0702201] ; National Key Research and Development Program of China[2017YFB0702401] ; National Natural Science Foundation of China[51631005] ; Administration of Tsinghua University
WOS关键词	GLASS MATRIX COMPOSITES ; METALLIC GLASSES ; DEFORMATION-BEHAVIOR ; SHEAR BANDS ; PLASTICITY ; DESIGN
WOS研究方向	Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000558085500037
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Administration of Tsinghua University
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/140163]
专题	中国科学院近代物理研究所
通讯作者	Liu, J. B.
作者单位	1.ShanDong Univ, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao 266237, Peoples R China 2.Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat MOE, Beijing 100084, Peoples R China 3.ShanDong Univ, Inst Frontier & Interdisciplinary Sci, Qingdao 266237, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Cai, B.,Wang, D.,Gao, N.,et al. Balancing strength and ductility of cylindrical-shaped Cu64Zr36 nanoglass via embedded Cu nanocrystals[J]. JOURNAL OF NON-CRYSTALLINE SOLIDS,2020,544:6.
APA	Cai, B..,Wang, D..,Gao, N..,Li, J. H..,Lai, W. S..,...&Liu, B. X..(2020).Balancing strength and ductility of cylindrical-shaped Cu64Zr36 nanoglass via embedded Cu nanocrystals.JOURNAL OF NON-CRYSTALLINE SOLIDS,544,6.
MLA	Cai, B.,et al."Balancing strength and ductility of cylindrical-shaped Cu64Zr36 nanoglass via embedded Cu nanocrystals".JOURNAL OF NON-CRYSTALLINE SOLIDS 544(2020):6.