An investigation of the impacts of non-isothermal aging on the microstructures and corrosion of WE43 Mg alloy
| Autor: | Zhi Chen, Huizhong Li, Xiaopeng Liang, Hui Tao, Yixuan Che, Ming-Chun Zhao |
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| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Materials Research and Technology, Vol 26, Iss , Pp 7605-7618 (2023) |
| Druh dokumentu: | article |
| ISSN: | 2238-7854 72421568 |
| DOI: | 10.1016/j.jmrt.2023.09.097 |
| Popis: | The impacts of non-isothermal aging treatment (NIA) on the microstructure and corrosion resistance of WE43 magnesium alloy was examined through weight loss experiments, hydrogen evolution experiments, electrochemical assessments, three-dimensional microscopy, potential surface measurements, and microscopic analyses. The NIA modified the WE43 magnesium alloy by decreasing the precipitation-free zone (PFZ) and disrupting the continuous arrangement of precipitates along the grain boundaries. The Volta potential at the grain boundaries of NAI specimens (with respect to the matrix) was −35 mV, significantly lower than −110 mV in T6 specimens. Due to the effect of micro-galvanic corrosion between the grain boundaries and the grain interiors couple, T6 specimens exhibited significant grain boundary corrosion. They showed grooves with a maximum depth of about 13 μm and a width of about 30 μm after the immersion test. The NAI specimens have shallower grooves at the grain boundary. The corrosion rate of the three specimens was ranked as T4> T6> NAI. |
| Databáze: | Directory of Open Access Journals |
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