Characteristics of stress relaxation kinetics of La60Ni15Al25 bulk metallic glass

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	Characteristics of stress relaxation kinetics of La60Ni15Al25 bulk metallic glass
	Qiao JC; Wang YJ(王云江); Pelletier JM; Keer LM; Fine ME; Yao Y
刊名	ACTA MATERIALIA
	2015-10-01
通讯作者邮箱	jean-marc.pelletier@insa-lyon.fr ; yaoy@nwpu.edu.cn
卷号	98 页码:43-50
关键词	Metallic glasses Stress relaxation Mechanical properties High-temperature deformation Deformation kinetics
ISSN号	1359-6454
通讯作者	Pelletier, JM (reprint author), Univ Lyon, MATEIS, UMR CNRS5510, INSA Lyon, Bat B Pascal, F-69621 Villeurbanne, France.
产权排序	[Qiao, J. C.; Yao, Y.] Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China; [Qiao, J. C.; Pelletier, J. M.] Univ Lyon, MATEIS, UMR CNRS5510, INSA Lyon, F-69621 Villeurbanne, France; [Wang, Yun-Jiang] Chinese Acad Sci, Inst Mech, Stake Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China; [Keer, Leon M.] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA; [Fine, Morris E.] Northwestern Univ, Dept Mat Sci & Engn, Evanston, IL 60208 USA
中文摘要	The 0 relaxation typically plays an important role in the plastic deformation of glassy materials. Compared with amorphous polymers, most of the metallic glasses do not show evident beta-relaxation based on mechanical spectroscopy. However, La60Ni15Al25 bulk metallic glass (BMG) exhibits a prominent beta relaxation process, which could be an ideal model alloy to investigate the correlation between the beta relaxation and mechanical behavior of metallic glasses. In this work, compressive properties and stress relaxation at high temperature (below glass transition temperature T-g) were studied. Stress relaxation of La60Ni15Al25 BMG was measured by uniaxial compressive tests and mechanical spectroscopy around both a and beta relaxation temperature domain. At higher temperatures and sufficiently low strain rate, the flow behavior of the La50Ni15Al25 BMG could be simulated by a master curve, showing that the behavior is independent of temperature, especially on the proximity of the beta relaxation process. Because the existence of the beta relaxation, a high value of the activation volume for the plastic deformation could be ascribed to the existence of a specific atomic arrangement in the La(60)Nt(15)Al(25) BMG. It is found that compressive stress relaxation kinetics parameter remains temperature independent below T-g. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
分类号	一类
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	SUPERCOOLED LIQUID REGION ; PLASTIC-DEFORMATION ; HOMOGENEOUS DEFORMATION ; MECHANICAL-PROPERTIES ; AMORPHOUS-ALLOYS ; BETA-RELAXATION ; FORMING LIQUIDS ; TRANSITION ; BEHAVIOR ; TEMPERATURE
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.actamat.2015.07.020
语种	英语
WOS记录号	WOS:000361074000004
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/58420]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Qiao JC,Wang YJ,Pelletier JM,et al. Characteristics of stress relaxation kinetics of La60Ni15Al25 bulk metallic glass[J]. ACTA MATERIALIA,2015,98:43-50.
APA	Qiao JC,王云江,Pelletier JM,Keer LM,Fine ME,&Yao Y.(2015).Characteristics of stress relaxation kinetics of La60Ni15Al25 bulk metallic glass.ACTA MATERIALIA,98,43-50.
MLA	Qiao JC,et al."Characteristics of stress relaxation kinetics of La60Ni15Al25 bulk metallic glass".ACTA MATERIALIA 98(2015):43-50.