In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses
文献类型：期刊论文
| 作者 | Wang, L; Zhao, YK; Nie, ZH; Wang, BP; Xue, YF; Zhang, HF; Fu, HM; Brown, DE; Ren, Y; Xue, YF (reprint author), Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China. |
| 刊名 | SCRIPTA MATERIALIA
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 149页码:112-116 |
| ISSN号 | 1359-6462 |
| 关键词 | Mechanical-properties Free-volume Flow Units Deformation Compression Percolation Relaxation Plasticity Activation Evolution |
| 英文摘要 | Atomic-structure evolution is significant in understanding the deformation mechanism of metallic glasses. Here, we firstly find a dual-step atomic strain variation in laser-shock-peened (LSPed) metallic glasses during compression tests by using in-situ synchrotron X-ray diffraction. Under low compressive load, LSP-deformed zone's atomic-structure shows low Young's Modulus (E); with load increase, atomic-structure are re-hardened, showing high E. An atomic deformation mechanism is proposed by using flow unit model, that LSP could induce interconnected flow units and homogenize the atomic-structure. These interconnected flow units are metastable and start to annihilate during compressive loading, causing the dual-step atomic strain variation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.; Atomic-structure evolution is significant in understanding the deformation mechanism of metallic glasses. Here, we firstly find a dual-step atomic strain variation in laser-shock-peened (LSPed) metallic glasses during compression tests by using in-situ synchrotron X-ray diffraction. Under low compressive load, LSP-deformed zone's atomic-structure shows low Young's Modulus (E); with load increase, atomic-structure are re-hardened, showing high E. An atomic deformation mechanism is proposed by using flow unit model, that LSP could induce interconnected flow units and homogenize the atomic-structure. These interconnected flow units are metastable and start to annihilate during compressive loading, causing the dual-step atomic strain variation. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| 资助机构 | National Natural Science Foundation of China [51471035, 51701018]; U.S. Department of Energy [DE-AC02-06CH11357] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79342]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Xue, YF (reprint author), Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wang, L,Zhao, YK,Nie, ZH,et al. In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses[J]. SCRIPTA MATERIALIA,2018,149:112-116. |
| APA | Wang, L.,Zhao, YK.,Nie, ZH.,Wang, BP.,Xue, YF.,...&Xue, YF .(2018).In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses.SCRIPTA MATERIALIA,149,112-116. |
| MLA | Wang, L,et al."In-situ synchrotron X-ray diffraction study of dual-step strain variation in laser shock peened metallic glasses".SCRIPTA MATERIALIA 149(2018):112-116. |
入库方式： OAI收割
来源：金属研究所
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