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Heat-resistant Al alloys: microstructural design and microalloying effect

  • Lightweight Materials
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Abstract

Lightweight strategy is essential for the development of transportation vehicles and aerospace industries. As a type of lightweight material, high-strength aluminum alloys are limited to service temperatures below 200 °C due to the rapid coarsening of strengthening nano-precipitates, which cannot satisfy the increasing demands of practical applications. High-temperature applications beyond 250 °C become the bottle-neck problem of Al alloys. In this paper, we review existing literature on the improvement of high-temperature performance of aluminum alloys by stabilizing nano-precipitates. On the basis of atomic-scale microstructure regulation, several design strategies, such as interface segregation, co-precipitation, core/shell structure, and interstitial ordering, have been proposed, resulting in the development of a number of heat-resistant Al alloys for use at 300–400 °C. Moreover, the fundamental theories of solid-state phase transformation, especially precipitation aging and coarsening, are correspondingly advanced on the frontiers of science.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (51790482, 52071253, 52001249 and 52271115) and the 111 Project of China (BP0618008).

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

    H. Xue, C. Yang, P. Zhang, S. H. Wu, G. Liu & J. Sun

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  1. H. Xue
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  2. C. Yang
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  3. P. Zhang
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  4. S. H. Wu
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  5. G. Liu
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CY, GL and JS initiated and supervised the project. HX and CY wrote the paper. All authors extensively discussed the data.

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Xue, H., Yang, C., Zhang, P. et al. Heat-resistant Al alloys: microstructural design and microalloying effect. J Mater Sci (2024). https://doi.org/10.1007/s10853-023-09295-5

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