A hierarchically correlated flow defect model for metallic glass: Universal understanding of stress relaxation and creep

doi:10.1016/j.ijplas.2022.103288

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	A hierarchically correlated flow defect model for metallic glass: Universal understanding of stress relaxation and creep
	Hao, Q.7; Lyu, G. J.6; Pineda, E.5; Pelletier, J. M.4; Wang, Y. J.3,6; Yang, Y.1,2; Qiao, J. C.7
刊名	INTERNATIONAL JOURNAL OF PLASTICITY
	2022-07-01
卷号	154 页码:19
关键词	Metallic glass Stress relaxation Creep Non-elastic deformation
ISSN号	0749-6419
DOI	10.1016/j.ijplas.2022.103288
通讯作者	Qiao, J. C.(qjczy@nwpu.edu.cn)
英文摘要	Due to the structurally disordered arrangement of atoms and deviation from thermodynamic equilibrium, the physical and mechanical properties of metallic glasses can vary with time, temperature and magnitude of strain or stress. The current work provides a theoretical framework based on the hierarchically correlated atomic theory, which allows a quantitative description of the non-elastic deformation in metallic glasses. The defect concentration is adopted as an order parameter, which can evolve with temperature and non-elastic strain owing to correlated atomic movements. Through our hierarchically correlated atomic theory, we derive the characteristic times for local shear events in metallic glasses that entail activation, growth and/or annihilation of flow defects, which however are not accounted for in the previous mean field theories. Finally, we demonstrate that the current theoretical framework can be validated by the stress relaxation and creep experiments on typical La-based metallic glasses, which in turn provides quantitative insights into the non-elastic deformation mechanisms in metallic glasses.
资助项目	NSFC[12072344] ; Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province[2021JC-12] ; MICINN[PID2020-112975GB-I00] ; Generalitat de Catalunya[2017SGR0042] ; Hong Kong government through the General Research Fund (GRF)[CityU11200719] ; Hong Kong government through the General Research Fund (GRF)[CityU11213118] ; Research Grant Council (RGC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
WOS关键词	PLASTIC-DEFORMATION ; BETA-RELAXATION ; FREE-VOLUME ; VISCOPLASTIC DEFORMATION ; INELASTIC DEFORMATION ; STRUCTURAL RELAXATION ; MECHANICAL-BEHAVIOR ; SHEAR ; TRANSFORMATION ; DYNAMICS
WOS研究方向	Engineering ; Materials Science ; Mechanics
语种	英语
WOS记录号	WOS:000789626900001
资助机构	NSFC ; Natural Science Basic Research Plan for Distinguished Young Scholars in Shaanxi Province ; MICINN ; Generalitat de Catalunya ; Hong Kong government through the General Research Fund (GRF) ; Research Grant Council (RGC) ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/89072]
专题	力学研究所_非线性力学国家重点实验室
通讯作者	Qiao, J. C.
作者单位	1.City Univ Hong Kong, Coll Engn, Dept Mat Sci & Engn, Kowloon Tong,Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 2.City Univ Hong Kong, Coll Engn, Dept Mech Engn, Kowloon Tong,Kowloon, Tat Chee Ave, Hong Kong, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Univ Lyon, MATEIS, INSA Lyon, UMR CNRS5510, Bat B Pascal, F-69621 Villeurbanne, France 5.Univ Politecn Catalunya BarcelonaTech, Inst Energy Technol, Dept Phys, Barcelona 08019, Spain 6.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 7.Northwestern Polytech Univ, Sch Mech Civil Engn & Architecture, Xian 710072, Peoples R China
推荐引用方式 GB/T 7714	Hao, Q.,Lyu, G. J.,Pineda, E.,et al. A hierarchically correlated flow defect model for metallic glass: Universal understanding of stress relaxation and creep[J]. INTERNATIONAL JOURNAL OF PLASTICITY,2022,154:19.
APA	Hao, Q..,Lyu, G. J..,Pineda, E..,Pelletier, J. M..,Wang, Y. J..,...&Qiao, J. C..(2022).A hierarchically correlated flow defect model for metallic glass: Universal understanding of stress relaxation and creep.INTERNATIONAL JOURNAL OF PLASTICITY,154,19.
MLA	Hao, Q.,et al."A hierarchically correlated flow defect model for metallic glass: Universal understanding of stress relaxation and creep".INTERNATIONAL JOURNAL OF PLASTICITY 154(2022):19.