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Microalloying Al alloys with Sc: a review

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Abstract

As a kind of important light alloys, the Al alloys exhibit mechanical properties that are closely related to the microstructures. Changing the main alloying elements and adjusting heat treatments are usually approaches to tune the microstructure and hence artificially control the mechanical properties. However, the windows for the two approaches have become quite narrow, after extensive studies in the last half of century. Microalloying has become the most promising strategy to further modify the microstructure and improve the mechanical properties of Al alloys, among which the element of scandium (Sc) is especially powerful. In this paper, the recent progresses in Al alloys microalloyed with Sc are briefly reviewed, focusing on the microstructural characterization, strengthening response, and underlying mechanisms. The possible key research points are also proposed for the further development of Al alloys microalloyed with Sc and other rare earth elements.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (Nos. 51621063, 51625103, 51722104, 51790482, and 51761135031) and the Program of the Ministry of Education of China for Introducing Talents of Discipline to Universities (No. BP2018008). This work is also supported by the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technologies.

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  1. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an, 710049, China

    Jin-Yu Zhang, Yi-Han Gao, Chong Yang, Peng Zhang, Jie Kuang, Gang Liu & Jun Sun

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  1. Jin-Yu Zhang
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Correspondence to Gang Liu.

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Zhang, JY., Gao, YH., Yang, C. et al. Microalloying Al alloys with Sc: a review. Rare Met. 39, 636–650 (2020). https://doi.org/10.1007/s12598-020-01433-1

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