| 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)
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| 2018 | |
| Source Publication | ACTA MATERIALIA
 |
| ISSN | 1359-6454 |
| EISSN | 1873-2453 |
| Volume | 155Pages:69-79 |
| Subtype | Article |
| Abstract | We 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. |
| Keyword | Metallic glasses X-ray computed tomography Microstructure Heterogeneity Fractal |
| DOI | 10.1016/j.actamat.2018.05.064 |
| WOS Keyword | MEDIUM-RANGE ORDER ; ELASTIC PROPERTIES ; SUPERCOOLED LIQUIDS ; STRUCTURAL MODEL ; AMORPHOUS SOLIDS ; FORMING LIQUIDS ; SHEAR BANDS ; POWER-LAW ; TRANSITION ; PACKING |
| Indexed By | SCI ; ADS ; EI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000439675000007 |
| EI Accession Number | 20182505335767 |
| ADS Bibcode | 2018AcMat.155...69H |
| ADS URL | https://ui.adsabs.harvard.edu/abs/2018AcMat.155...69H |
| ADS CITATIONS | https://ui.adsabs.harvard.edu/abs/2018AcMat.155...69H/citations |
| Citation statistics |
Cited Times:10 [ADS]
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| Document Type | 期刊论文 |
| Identifier | http://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 Affilication | Institute 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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