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Flaw-insensitive fracture of a micrometer-sized brittle metallic glass
Qu, Ruitao1,2,3; Maass, Robert4,5; Liu, Zengqian2; Tonnies, Dominik1; Tian, Lin1; Ritchie, Robert O.6,7; Zhang, Zhefeng2; Volkert, Cynthia A.1
Corresponding AuthorZhang, Zhefeng(zhfzhang@imr.ac.cn) ; Volkert, Cynthia A.(volkert@ump.gwdg.de)
2021-10-01
Source PublicationACTA MATERIALIA
ISSN1359-6454
Volume218Pages:9
AbstractBrittle materials, such as oxide glasses, are usually very sensitive to flaws, giving rise to a macroscopic fracture strength that is much lower than that predicted by theory. The same applies to metallic glasses (MGs), with the important difference that these glasses can exhibit certain plastic strain prior to catastrophic failure. Here we consider the strongest metallic alloy known, a ternary Co55Ta10B35 MG. We show that this macroscopically brittle glass is flaw-insensitive at the micrometer scale. This discovery emerges when testing pre-cracked specimens with self-similar geometries, where the fracture stress does not decrease with increasing pre-crack size. The fracture toughness of this ultra-strong glassy alloy is further shown to increase with increasing sample size. Both these findings deviate from our classical understanding of fracture mechanics, and are attributed to a transition from toughness-controlled to strength-controlled fracture below a critical sample size. (C) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
KeywordMetallic glass Fracture toughness Size effect Small-scale
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; Alexander von Humboldt (AvH) Foundation ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division ; Department of Materials Science and Engineering at UIUC ; KC Wong Education Foundation
DOI10.1016/j.actamat.2021.117219
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[51771205] ; Alexander von Humboldt (AvH) Foundation ; U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division[DE-AC02-05CH11231] ; Department of Materials Science and Engineering at UIUC ; KC Wong Education Foundation[GJTD-2020-09]
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000706379300010
PublisherPERGAMON-ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/166589
Collection中国科学院金属研究所
Corresponding AuthorZhang, Zhefeng; Volkert, Cynthia A.
Affiliation1.Univ Gottingen, Inst Mat Phys, Friedrich Hund Pl 1, D-37077 Gottingen, Germany
2.Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Peoples R China
3.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, 127 West Youyi Rd, Xian 710072, Peoples R China
4.Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA
5.BAM Fed Inst Mat Res & Testing, Eichen 87, D-12205 Berlin, Germany
6.Univ Calif Berkeley, Mat Sci Div, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA
7.Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
Recommended Citation
GB/T 7714
Qu, Ruitao,Maass, Robert,Liu, Zengqian,et al. Flaw-insensitive fracture of a micrometer-sized brittle metallic glass[J]. ACTA MATERIALIA,2021,218:9.
APA Qu, Ruitao.,Maass, Robert.,Liu, Zengqian.,Tonnies, Dominik.,Tian, Lin.,...&Volkert, Cynthia A..(2021).Flaw-insensitive fracture of a micrometer-sized brittle metallic glass.ACTA MATERIALIA,218,9.
MLA Qu, Ruitao,et al."Flaw-insensitive fracture of a micrometer-sized brittle metallic glass".ACTA MATERIALIA 218(2021):9.
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