| HE Min,ZHU Yi-jie,ZHAO En-lan,YAN Lin-quan.Preparation of Aluminum Alloy EBSD Specimens by Electropolishing[J],49(10):338-345 |
| Preparation of Aluminum Alloy EBSD Specimens by Electropolishing |
| Received:November 19, 2019 Revised:October 20, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2020.10.040 |
| KeyWord:electropolishing aluminum alloy EBSD Jacquet visous film model anodic polarization curve current-time curve |
| Author | Institution |
| HE Min |
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou , China |
| ZHU Yi-jie |
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou , China |
| ZHAO En-lan |
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou , China |
| YAN Lin-quan |
School of Mechanical and Electrical Engineering, Xuzhou University of Technology, Xuzhou , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to obtain high quality EBSD sample surfaces in conductive single-phase metals, so as to study the method of preparing aluminum alloy samples by electropolishing and provide theoretical support. Based on the Jacquet visous film model and anode dissolution electrochemistry principle, the anodic polarization curve, the current versus time curve and the secondary electron image of scanning electron microscope were used to obtain electropolishing parameters and theoretical method for batch preparation of aluminum alloy EBSD samples. The static method in the potentiostatic method was adopted to obtain the time with stable current through a stable voltage-current trend. Electropolishing experiments at various voltages within 90 seconds were conducted to obtain the relationship between voltage and stable current and plot the anodic polarization curve. The anodic polarization curve was applied to analyze the slope after the current switched from stable to upward trend and the theoretical minimum decomposition voltage value at the horizontal coordinate of voltage. The polishing surface was observed above the minimum decomposition voltage combined with the secondary electron image of scanning electron microscope. An optimum polishing voltage value of 31 V was obtained. By using the curve of current changing with time and combining the Jacquet visous film model, it was verified that the best polishing time under the optimal voltage was 12 s through the secondary electronic image of SEM, which was the lowest point of current in the current-time curve. The calibration rate of the aluminum alloy EBSD sample prepared under this process reached 97% and the ideal electropolishing process was realized. The optimal voltage obtained by anodic polarization curve and the minimum current rule under the optimal voltage are supported by Jacquet visous model. The electropolishing process obtained by Jacquet visous model can prepare high quality sample surfaces, and can also provide theoretical methods for obtaining the optimal electropolishing process value for other metal block conductive materials and other experimental types requiring electropolishing. |
| Close |
|
|
|