| Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass | |
| Y. Y. Zhao; X. Zhao | |
| 2012 | |
| Source Publication | Journal of Alloys and Compounds
 |
| ISSN | 0925-8388 |
| Volume | 515Pages:154-160 |
| Abstract | Structural relaxation and its influence on the elastic properties and mechanical properties of Mg-Zn-Ca bulk metallic glass (BMG) were investigated. It was found that relaxation can occur spontaneously even at room temperature (T-R) because of the high homologous temperature (T-R/T-g > 0.7) of the BMG. A linear dependence between enthalpy change (Delta H-t) and free volume change (Delta v(f)) for the annealed Mg66Zn30Ca4 BMG over a wide temperature range was discovered. The structural relaxation of the Mg66Zn30Ca4 BMG resulted in increased shear modulus mu (3.4%) and decreased Poisson's ratio nu (1.4%). However, the tested BMG samples exhibited no obvious degradation of notch toughness (K-Q) even after full structural relaxation. The K-Q values are 9.0 +/- 1.7 MPam(1/2) and 7.1 +/- 1.8 MPam(1/2) for the freshly prepared samples (annealed at T-R for 1.5 h) and fully relaxed samples (annealed at 373 K for 4 h), respectively. These results indicate that the mechanical properties of the Mg66Zn30Ca4 BMG are not very sensitive to its structural relaxation over a wide temperature and time range. These findings may facilitate the clinical applications of Mg66Zn30Ca4 BMG as a promising implant material for future clinical applications. (C) 2011 Elsevier B. V. All rights reserved. |
| description.department | [zhao, yuan-yun; zhao, xu] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [zhao, yuan-yun] chinese acad sci, zhejiang prov key lab magnet mat & applicat techn, key lab magnet mat & devices, ningbo inst mat technol & engn, ningbo 315201, zhejiang, peoples r china.;zhao, yy (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china.;zhaoyy@nimte.ac.cn |
| Keyword | Mg-based Metallic Glass Biodegradable Materials Structural Relaxation Elastic Properties Notch Toughness In-vivo Corrosion Room-temperature Embrittlement Magnesium Alloys Mechanical-properties Fracture-toughness Bone Transition Strength Implants Behavior |
| URL | 查看原文 |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/60495 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Y. Y. Zhao,X. Zhao. Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass[J]. Journal of Alloys and Compounds,2012,515:154-160. |
| APA | Y. Y. Zhao,&X. Zhao.(2012).Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass.Journal of Alloys and Compounds,515,154-160. |
| MLA | Y. Y. Zhao,et al."Structural relaxation and its influence on the elastic properties and notch toughness of Mg-Zn-Ca bulk metallic glass".Journal of Alloys and Compounds 515(2012):154-160. |
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