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Density fluctuations with fractal order in metallic glasses detected by sib synchrotron X-ray nano-computed tomography
Huang, B; Ge, TP; Liu, GL; Luan, JH; He, QF; Yuan, QX; Huang, WX; Zhang, K; Bai, HY; Shek, CH; Liu, CT; Yang, Y; Wang, WH; Yuan QX(袁清习); Huang WX(黄万霞); Zhang K(张凯)
2018
Source PublicationACTA MATERIALIA
ISSN1359-6454
EISSN1873-2453
Volume155Pages:69-79
SubtypeArticle
AbstractWe report density fluctuations spanning from nano-to micrometer scale in the three-dimensional (3D) space in metallic glasses (MGs) detected with synchrotron X-ray nano-computed tomography, which decouple with the chemical homogeneity. The MG quenched from fragile supercooled liquid exhibits a more heterogeneous microstructure with a gradient density fluctuation. Severe inhomogeneous deformation rejuvenates the microstructure of the MG with the creation of a large amount of low-density regions, which percolate into shear-band-like layers. Ramified 2.5-dimensional fractal low-density regions exist in all the MGs with the correlation length increasing with microstructural heterogeneity. The formation of the density fluctuations with fractal order in the MGs is discussed based on the percolation of low-density regions and shear transformation zones during the glass transition and deformation processes. Our results directly demonstrate the existence of fractal low-density entropic droplets in MGs affected by fragilities and thermomechanical histories, which could be significant for understanding and controlling the disordered structure of amorphous solids. (C) 2018 Published by Elsevier Ltd on behalf of Acta Materialia Inc.
KeywordMetallic glasses X-ray computed tomography Microstructure Heterogeneity Fractal
DOI10.1016/j.actamat.2018.05.064
WOS KeywordMEDIUM-RANGE ORDER ; ELASTIC PROPERTIES ; SUPERCOOLED LIQUIDS ; STRUCTURAL MODEL ; AMORPHOUS SOLIDS ; FORMING LIQUIDS ; SHEAR BANDS ; POWER-LAW ; TRANSITION ; PACKING
Indexed BySCI ; ADS ; EI
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000439675000007
EI Accession Number20182505335767
ADS Bibcode2018AcMat.155...69H
ADS URLhttps://ui.adsabs.harvard.edu/abs/2018AcMat.155...69H
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2018AcMat.155...69H/citations
Citation statistics
Cited Times:9 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286143
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Huang, B,Ge, TP,Liu, GL,et al. Density fluctuations with fractal order in metallic glasses detected by sib synchrotron X-ray nano-computed tomography[J]. ACTA MATERIALIA,2018,155:69-79.
APA Huang, B.,Ge, TP.,Liu, GL.,Luan, JH.,He, QF.,...&张凯.(2018).Density fluctuations with fractal order in metallic glasses detected by sib synchrotron X-ray nano-computed tomography.ACTA MATERIALIA,155,69-79.
MLA Huang, B,et al."Density fluctuations with fractal order in metallic glasses detected by sib synchrotron X-ray nano-computed tomography".ACTA MATERIALIA 155(2018):69-79.
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