Density fluctuations with fractal order in metallic glasses detected by sib synchrotron X-ray nano-computed tomography
文献类型：期刊论文
| 作者 | Ge, TP; Liu, GL; Luan, JH; He, QF; Yuan, QX ; Huang, WX; Zhang, K; Bai, HY; Shek, CH; Liu, CT
|
| 刊名 | ACTA MATERIALIA
 |
| 出版日期 | 2018 |
| 卷号 | 155页码:69-79 |
| 关键词 | Metallic glasses X-ray computed tomography Microstructure Heterogeneity Fractal |
| ISSN号 | 1359-6454 |
| DOI | 10.1016/j.actamat.2018.05.064 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 电子版国际标准刊号 | 1873-2453 |
| WOS关键词 | MEDIUM-RANGE ORDER ; ELASTIC PROPERTIES ; SUPERCOOLED LIQUIDS ; STRUCTURAL MODEL ; AMORPHOUS SOLIDS ; FORMING LIQUIDS ; SHEAR BANDS ; POWER-LAW ; TRANSITION ; PACKING |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000439675000007 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286143]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Ge, TP,Liu, GL,Luan, JH,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 | Ge, TP.,Liu, GL.,Luan, JH.,He, QF.,Yuan, QX.,...&Huang, B.(2018).Density fluctuations with fractal order in metallic glasses detected by sib synchrotron X-ray nano-computed tomography.ACTA MATERIALIA,155,69-79. |
| MLA | Ge, TP,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. |
入库方式： OAI收割
来源：高能物理研究所
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