Ultrasonic plasticity of metallic glass near room temperature | |
Li, X.1; Wei D(魏丹)2; Zhang, J. Y.3; Liu, X. D.1; Li, Z.1; Wang, T. Y.3; He, Q. F.3; Wang YJ(王云江)2,4; Ma, J.1; Wang, W. H.5,6; Yang, Y.3,7 | |
发表期刊 | APPLIED MATERIALS TODAY |
2020-12-01 | |
卷号 | 21页码:8 |
ISSN | 2352-9407 |
摘要 | Bulk metallic glasses (BMGs) are well-known for their superb strength (1-4 GPa) (Ashby and Greer, 2006) [1] but poor/localized plasticity when deformed at low temperatures or high strain rates (Inoue and Takeuchi, 2011; Kumar et al., 2009) [2,3]. Therefore, processing of BMGs, such as forming and shaping for various important applications, is usually performed above their glass transition temperatures (T-g) - also known as "thermo-plastic" forming (Geer, 1995) - for which the selection of alloy composition and the protocol for thermal treatment is demanding in order to promote extensive homogeneous plastic flows while avoiding crystallization (Geer, 1995). In stark contrast, here we demonstrate that homogeneous super-plasticity can occur rapidly in different BMGs below their Tg when subjected to ultrasonic agitations. Through atomistic simulations and nanomechanical characterization, we provide the compelling evidence to show that this super-plasticity is attributed to dynamic heterogeneity and cyclic induced atomic-scale dilations in BMGs, which leads to significant rejuvenation and final collapse of the solid-like amorphous structure, thereby leading to an overall fluid-like behavior. Our finding uncovers that BMGs can undergo substantial plastic flows through unusual liquefaction near room temperature and, more importantly, it leads to the development of a facile and cost-effective "ultrasonic-plastic" forming method to process a wide range of BMGs at low temperatures. (C) 2020 Elsevier Ltd. All rights reserved. |
关键词 | Metallic glass Ultrasound agitated super-plasticity Room temperature deformation Atomic-scale dilations Dynamic heterogeneity |
DOI | 10.1016/j.apmt.2020.100866 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000599825600001 |
关键词[WOS] | MECHANICAL-BEHAVIOR ; DYNAMICS ; RELAXATION ; NANOINDENTATION ; DEFORMATION ; TRANSITION ; EVOLUTION ; MODULUS ; ALLOYS |
WOS研究方向 | Materials Science |
WOS类目 | Materials Science, Multidisciplinary |
资助项目 | Key Basic and Applied Research Program of Guangdong Province, China[20198030302010] ; NSF of China[51871157] ; Science and Technology Innovation Commission Shenzhen[JCYJ20170112111216258] ; National Key Research and Development Program of China[2018YFA0703604] ; NSFC[11672299] ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2017025] ; Research Grant Council (RGC), Hong Kong Government, through General Research Fund (RGC)[CityU11213118] ; Research Grant Council (RGC), Hong Kong Government, through General Research Fund (RGC)[CityU11200719] ; Research Grant Council (RGC), Hong Kong Government, through General Research Fund (RGC)[CityU11209317] |
项目资助者 | Key Basic and Applied Research Program of Guangdong Province, China ; NSF of China ; Science and Technology Innovation Commission Shenzhen ; National Key Research and Development Program of China ; NSFC ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Research Grant Council (RGC), Hong Kong Government, through General Research Fund (RGC) |
论文分区 | 一类 |
力学所作者排名 | 1 |
RpAuthor | Wang, Y. J. |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/85883 |
专题 | 非线性力学国家重点实验室 |
作者单位 | 1.Shenzhen Univ, Coll Mechatron & Control Engn, Shenzhen 518060, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.City Univ Hong Kong, Dept Mech Engn, Coll Engn, Kowloon Tong,Kowloon, Hong Kong, Peoples R China; 4.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 5.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China; 6.Songshan Lake Mat Lab, Dongguan 523808, Peoples R China; 7.City Univ Hong Kong, Dept Mat Sci & Engn, Coll Engn, Kowloon Tong,Kowloon, Hong Kong, Peoples R China |
推荐引用方式 GB/T 7714 | Li, X.,Wei D,Zhang, J. Y.,et al. Ultrasonic plasticity of metallic glass near room temperature[J]. APPLIED MATERIALS TODAY,2020,21:8. |
APA | Li, X..,Wei D.,Zhang, J. Y..,Liu, X. D..,Li, Z..,...&Yang, Y..(2020).Ultrasonic plasticity of metallic glass near room temperature.APPLIED MATERIALS TODAY,21,8. |
MLA | Li, X.,et al."Ultrasonic plasticity of metallic glass near room temperature".APPLIED MATERIALS TODAY 21(2020):8. |
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