Author(s)

Yong Wang ¹, Tiewu Wang ¹, Xiaoming Cui ¹, Fei Liu ¹, Xiaohu Hou ¹, Xueping Zhao ¹, Pucun Bai ¹

Affiliation(s)

¹ School of Materials Science and Engineering, Inner Mongolia University of Technology, Hohhot, 010051, China

Corresponding Author

Pucun Bai

ABSTRACT

This study investigates Al-Zn-Mg-Cu-Sc alloys by introducing varying amounts of Li to achieve synergistic regulation of the alloy microstructure and morphology. Optical microscopy (OM), scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDS) were employed to analyze the alloys, focusing on the microstructural evolution and variations under different Li additions. The results indicate that the incorporation of Li leads to microstructural refinement, accompanied by the formation of equiaxed grains. Compared with the Li-free alloy, the alloy containing 1.5wt% Li exhibited a 47% reduction in grain size. SEM and EDS analyses further revealed that Al is mainly distributed within the grains, Mg and Zn are dispersed throughout the alloy matrix, while Cu and Sc are enriched at the grain boundaries.

KEYWORDS

Al-Zn-Mg-Cu-Sc Alloy, As-Cast, Microstructure

CITE THIS PAPER

Yong Wang, Tiewu Wang, Xiaoming Cui, Fei Liu, Xiaohu Hou, Xueping Zhao, Pucun Bai, Effect of Li Addition on the Microstructure of As-Cast Al-Zn-Mg-Cu-Sc Alloys. Journal of Materials, Processing and Design (2025) Vol. 9: 141-147. DOI: http://dx.doi.org/10.23977/jmpd.2025.090115.

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