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| Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys | |
| Liu, Jing; Yang, Lixin; Zhang, Chunyan; Zhang, Bo; Zhang, Tao; Li, Yang; Wu, Kaiming; Wang, Fuhui | |
| 2019-04-25 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 782Pages:648-658 |
| Abstract | The role of long period stacking ordered (LPSO) structure in the corrosion behavior of Mg-Gd-Zn-Zr alloys was investigated by means of potentiodynamic polarization experiments, hydrogen evolution tests, and microstructure characterization. The corrosion rate of the Mg-Gd-Zn-Zr alloys is mainly determined by the acceleration effect of the second phases in the micro-galvanic corrosion. After T4 heat-treatment, the beta-(Mg,Zn)(3)Gd eutectic phase in the as-cast Mg-Gd-Zn-Zr alloys transforms into an X phase with a 14-HLPSO structure. According to the results of scanning Kelvin probe force microscopy (SKPFM), the potential difference between LPSO phase and the alpha-Mg matrix is 243 mV, whereas, it is 290 mV between the eutectic phase and matrix in the as-cast alloys. The low relative potential and volume fraction of the LPSO phase reduce the acceleration degree of micro-galvanic corrosion. As a result, the corrosion resistance of Mg-Gd-Zn-Zr alloys improves significantly by the LPSO structure. (C) 2018 Elsevier B.V. All rights reserved. |
| Keyword | Mg-Gd-Zn-Zr alloys LPSO structure Corrosion behavior SKPFM |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000458608600072 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/81169 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | Liu, Jing,Yang, Lixin,Zhang, Chunyan,et al. Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,782:648-658. |
| APA | Liu, Jing.,Yang, Lixin.,Zhang, Chunyan.,Zhang, Bo.,Zhang, Tao.,...&Wang, Fuhui.(2019).Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys.JOURNAL OF ALLOYS AND COMPOUNDS,782,648-658. |
| MLA | Liu, Jing,et al."Role of the LPSO structure in the improvement of corrosion resistance of Mg-Gd-Zn-Zr alloys".JOURNAL OF ALLOYS AND COMPOUNDS 782(2019):648-658. |
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