Homogeneous viscous flow behavior of a Cu-Zr based bulk metallic glass composites

doi:10.1016/j.msea.2014.09.080

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	Homogeneous viscous flow behavior of a Cu-Zr based bulk metallic glass composites
	Zhang, X. Y.; Yuan, Z. Z.; Feng, X. L.; Cui, L. Z.; Li, D. X.
刊名	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
	2015-01-03
卷号	620 页码:352-358
关键词	Bulk amorphous alloys Composites Mechanical characterization High temperature deformation
ISSN号	0921-5093
DOI	10.1016/j.msea.2014.09.080
英文摘要	In this paper, Cu40Zr44Ag8Al8 bulk metallic glass composites (BMGCs) consisting of various volume fraction of nanocrystals embedded in the amorphous matrix was synthesized by controlled annealing treatment of an as-cast BMGCs. The high temperature compression behaviors of the BMGCs were characterized in the supercooled liquid region. Results show that the flow stresses keep increasing after an initial decrease with extension of the annealing time. With annealing the values of activation volume V-act is determined to be increasing from 283.6216 angstrom(3) to 305.553 angstrom(3), suggesting that the jump of atoms is a cooperative process during the high-temperature deformation. Flow behavior of the BMGCs annealed for less than 8 min transform from Newtonian to non-Newtonian dependant on the stain rate and can be successively fitted by the visco-plasticity model. Fitting results indicate that deformation behaviors of these samples are governed by homogeneous flow of the amorphous matrix and indeed determined by the viscosities in the Newtonian flow stage. However, the BMGCs annealed for 8 min exhibit a non-Newtonian flow over the entire compression process and fail to be fitted by the visco-plasticity model. Micrographs of the sample reflect an impinged structure, indicating that high temperature deformation behavior of the BMGCs with high volume fractions of particles is indeed controlled by that of a backbone of particles. (C) 2014 Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[51061008]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000346453100041
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/34146]
专题	兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Yuan, Z. Z.
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, X. Y.,Yuan, Z. Z.,Feng, X. L.,et al. Homogeneous viscous flow behavior of a Cu-Zr based bulk metallic glass composites[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,620:352-358.
APA	Zhang, X. Y.,Yuan, Z. Z.,Feng, X. L.,Cui, L. Z.,&Li, D. X..(2015).Homogeneous viscous flow behavior of a Cu-Zr based bulk metallic glass composites.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,620,352-358.
MLA	Zhang, X. Y.,et al."Homogeneous viscous flow behavior of a Cu-Zr based bulk metallic glass composites".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 620(2015):352-358.