Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites
(Ti<sub>0.5</sub>Ni<sub>0.5</sub>)<sub>80</sub>Cu<sub>20</sub> metallic glass composite samples with 3mm diameter were prepared by the levitation suspend melting-water cooled Cu mold process, microstructure of the alloy was characterized. The potential...
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doaj-a17645306c9c406db21fee7e60f595432020-11-24T22:36:06ZzhoJournal of Materials EngineeringJournal of Materials Engineering1001-43811001-43812018-01-01461253010.11868/j.issn.1001-4381.2017.000589201801000589Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix CompositesZHAO Yan-chun0MAO Rui-peng1YUAN Xiao-peng2XU Cong-yu3JIANG Jian-long4SUN Hao5KOU Sheng-zhong6State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, ChinaState Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China(Ti<sub>0.5</sub>Ni<sub>0.5</sub>)<sub>80</sub>Cu<sub>20</sub> metallic glass composite samples with 3mm diameter were prepared by the levitation suspend melting-water cooled Cu mold process, microstructure of the alloy was characterized. The potential dynamic polarization curves in the different media were tested by electrochemical workstation in a three-electrode system, meanwhile, the electrochemical corrosion morphology and corrosion products were analyzed and characterized. The results show that the microstructure consists of amorphous matrix and shape memory crystal phase, exhibits gradient microstructure in casting process of temperature gradient, random dense pile of amorphous structure is formed in the edge area due to fast cooling rate, the main precipitation phase is overcooling austenite phase in the core area. In artificial seawater and simulated body solution (PBS), the alloy exhibits good corrosion resistance. Compared with crystalline TC4 alloy, the alloy exhibits high free corrosion potential that shows low corrosion thermodynamics tendency and has low corrosion current density as well as high polarization resistance that indicates low dynamic corrosion rate. Due to the low activity anion concentration in PBS solution, the alloy exhibits more excellent corrosion resistance than in artificial seawater. No pitting corrosion pits and corrosion products were found after electrochemical corrosion. The oxide film in the edge area is more compact and uniform than in the core area as well.http://jme.biam.ac.cn/CN/Y2018/V46/I1/25bulk metallic glassshape memory phasemicrostructurecorrosion behaviour |
collection |
DOAJ |
language |
zho |
format |
Article |
sources |
DOAJ |
author |
ZHAO Yan-chun MAO Rui-peng YUAN Xiao-peng XU Cong-yu JIANG Jian-long SUN Hao KOU Sheng-zhong |
spellingShingle |
ZHAO Yan-chun MAO Rui-peng YUAN Xiao-peng XU Cong-yu JIANG Jian-long SUN Hao KOU Sheng-zhong Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites Journal of Materials Engineering bulk metallic glass shape memory phase microstructure corrosion behaviour |
author_facet |
ZHAO Yan-chun MAO Rui-peng YUAN Xiao-peng XU Cong-yu JIANG Jian-long SUN Hao KOU Sheng-zhong |
author_sort |
ZHAO Yan-chun |
title |
Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites |
title_short |
Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites |
title_full |
Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites |
title_fullStr |
Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites |
title_full_unstemmed |
Corrosion Behaviour of Ti-based Bulk Metallic Glass Matrix Composites |
title_sort |
corrosion behaviour of ti-based bulk metallic glass matrix composites |
publisher |
Journal of Materials Engineering |
series |
Journal of Materials Engineering |
issn |
1001-4381 1001-4381 |
publishDate |
2018-01-01 |
description |
(Ti<sub>0.5</sub>Ni<sub>0.5</sub>)<sub>80</sub>Cu<sub>20</sub> metallic glass composite samples with 3mm diameter were prepared by the levitation suspend melting-water cooled Cu mold process, microstructure of the alloy was characterized. The potential dynamic polarization curves in the different media were tested by electrochemical workstation in a three-electrode system, meanwhile, the electrochemical corrosion morphology and corrosion products were analyzed and characterized. The results show that the microstructure consists of amorphous matrix and shape memory crystal phase, exhibits gradient microstructure in casting process of temperature gradient, random dense pile of amorphous structure is formed in the edge area due to fast cooling rate, the main precipitation phase is overcooling austenite phase in the core area. In artificial seawater and simulated body solution (PBS), the alloy exhibits good corrosion resistance. Compared with crystalline TC4 alloy, the alloy exhibits high free corrosion potential that shows low corrosion thermodynamics tendency and has low corrosion current density as well as high polarization resistance that indicates low dynamic corrosion rate. Due to the low activity anion concentration in PBS solution, the alloy exhibits more excellent corrosion resistance than in artificial seawater. No pitting corrosion pits and corrosion products were found after electrochemical corrosion. The oxide film in the edge area is more compact and uniform than in the core area as well. |
topic |
bulk metallic glass shape memory phase microstructure corrosion behaviour |
url |
http://jme.biam.ac.cn/CN/Y2018/V46/I1/25 |
work_keys_str_mv |
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1725721401445318656 |