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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; Pelletier, JM (reprint author), Univ Lyon, MATEIS, UMR CNRS5510, INSA Lyon, Bat B Pascal, F-69621 Villeurbanne, France.
Source PublicationACTA MATERIALIA
2015-10-01
Volume98Pages:43-50
ISSN1359-6454
AbstractThe 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.
KeywordMetallic Glasses Stress Relaxation Mechanical Properties High-temperature Deformation Deformation Kinetics
DOI10.1016/j.actamat.2015.07.020
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000361074000004
WOS KeywordSUPERCOOLED LIQUID REGION ; PLASTIC-DEFORMATION ; HOMOGENEOUS DEFORMATION ; MECHANICAL-PROPERTIES ; AMORPHOUS-ALLOYS ; BETA-RELAXATION ; FORMING LIQUIDS ; TRANSITION ; BEHAVIOR ; TEMPERATURE
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationThe authors acknowledge the experimental support by Professor J.J. Blandin ([NP-Grenoble). This work was supported by the National Natural Science Foundation of China (Nos. 51401192, 11402269 and 51301136), the Fundamental Research Funds for the Central Universities (No. 3102015ZY027), and Opening fund of State Key Laboratory of Nonlinear Mechanics (LNM201511).
DepartmentLNM冲击动力学与新型材料力学性能
Classification一类
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Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58420
Collection非线性力学国家重点实验室
Corresponding AuthorPelletier, JM (reprint author), Univ Lyon, MATEIS, UMR CNRS5510, INSA Lyon, Bat B Pascal, F-69621 Villeurbanne, France.
Recommended Citation
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.,...&Pelletier, JM .(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.
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