The effect of LPSO phase on the high-temperature oxidation of a stainless Mg-Y-Al alloy

Zhipeng Wang; Zhao Shen; Yang Liu; Yahuan Zhao; Qingchun Zhu; Yiwen Chen; Jingya Wang; Yangxin Li; Sergio Lozano-Perez; Xiaoqin Zeng

Journal of Magnesium and Alloys (Oct 2024)

The effect of LPSO phase on the high-temperature oxidation of a stainless Mg-Y-Al alloy

Zhipeng Wang,
Zhao Shen,
Yang Liu,
Yahuan Zhao,
Qingchun Zhu,
Yiwen Chen,
Jingya Wang,
Yangxin Li,
Sergio Lozano-Perez,
Xiaoqin Zeng

Affiliations

Zhipeng Wang: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Zhao Shen: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Institute of Medical Robotics, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.
Yang Liu: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yahuan Zhao: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Qingchun Zhu: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yiwen Chen: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Jingya Wang: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Yangxin Li: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.
Sergio Lozano-Perez: Department of Materials Science, University of Oxford, Parks Road, Oxford OX1 3PH, UK
Xiaoqin Zeng: National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Corresponding authors.

Journal volume & issue: Vol. 12, no. 10
pp. 4045 – 4052

Abstract

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In this study, we investigated the oxidation of the Mg-11Y-1Al alloy at 500 °C in an Ar-20%O2 environment. Multiscale analysis showed the network-like long-period stacking ordered (LPSO) phase transformed into needle-like LPSO and polygonal Mg24Y5 phases, leading to the formation of a high-dense network of needle-like oxides at the oxidation front. These oxides grew laterally along the oxide/matrix interfaces, forming a thicker, continuous scale that effectively blocked elemental diffusion. Hence, the preferential oxidation along the needle-like LPSO is believed to accelerate the formation of a thicker and continuous oxide scale, further improving the oxidation resistance of the Mg-11Y-1Al alloy.

Published in Journal of Magnesium and Alloys

ISSN: 2213-9567 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.keaipublishing.com/en/journals/journal-of-magnesium-and-alloys/

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