Nanoindentation investigation on the creep mechanism in metallic glassy films
文献类型：期刊论文
| 作者 | Ma Y ; Peng GJ; Feng YH(冯义辉); Zhang TH(张泰华)
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| 刊名 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
 |
| 出版日期 | 2016-01-10 |
| 卷号 | 651页码:548-555 |
| 通讯作者邮箱 | zhangth@zjut.edu.cn |
| 关键词 | Metallic glass Nanoindentation Creep Free volume Shear transformation zone |
| ISSN号 | 0921-5093 |
| 产权排序 | [Ma, Y.; Peng, G. J.; Zhang, T. H.] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China; [Feng, Y. H.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China |
| 通讯作者 | Zhang, TH (reprint author), Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China. |
| 中文摘要 | Using the magnetron sputtering technique, two metallic glassy films namely Cu44.3Zr45.1Al10.6 and Cu44.2Zr43Al11.3Ti1.5 were prepared by alloy targets. The minor Ti addition effectively induces excess free volume. Upon spherical nanoindentation, the creep behaviors of both films were studied at various peak loads. As the increase of peak load, the creep deformations became more severely in both samples. Interestingly, Cu-Zr-Al-Ti film crept stronger than Cu-Zr-Al at small-load holdings (nominal elastic regimes), whereas it is opposite at high-load holdings (plastic regimes). The creep characteristic could be intrinsically related to the scale variation of the shear transformation zone (STZ) with Ti addition. Statistical analysis was employed to estimate the STZ volume, which increased by 60% with Ti addition in the Cu-Zr-Al film. The finite element modeling indicated that STZs would be activated even at the minimum load we adopted. Higher activation energy of larger STZs in Cu-Zr-Al-Ti enables less flow units, which offsets the creep enhancement by the excess free volume with Ti addition. The deeper the pressed depth of the indenter, the more contribution of the STZ operation on creep deformation. In addition, experimental observation on the creep flow rates implies that STZ could be the dominating mechanism at the steady-state creep. This study reveals that STZ volume could also be important to the time-dependent plastic deformation in metallic glass, besides as a key parameter for instantaneous plasticity. (C) 2015 Elsevier B.V. All rights reserved. |
| 分类号 | 一类 |
| 类目[WOS] | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | SHEAR TRANSFORMATION ZONES ; VISCOPLASTIC DEFORMATION ; PLASTIC-DEFORMATION ; INDENTATION CREEP ; AMORPHOUS-ALLOYS ; SIZE ; FLOW ; DYNAMICS ; BEHAVIOR |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1016/j.msea.2015.11.014 |
| 语种 | 英语 |
| WOS记录号 | WOS:000367486800065 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/58644]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Ma Y,Peng GJ,Feng YH,et al. Nanoindentation investigation on the creep mechanism in metallic glassy films[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,651:548-555. |
| APA | Ma Y,Peng GJ,冯义辉,&张泰华.(2016).Nanoindentation investigation on the creep mechanism in metallic glassy films.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,651,548-555. |
| MLA | Ma Y,et al."Nanoindentation investigation on the creep mechanism in metallic glassy films".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 651(2016):548-555. |
入库方式： OAI收割
来源：力学研究所
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