51. Heat-resistant Al alloys: microstructural design and microalloying effect.
- Author
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Xue, H., Yang, C., Zhang, P., Wu, S. H., Liu, G., and Sun, J.
- Subjects
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SOLID-state phase transformations , *MICROALLOYING , *ALUMINUM alloys , *HEAT resistant alloys , *LIGHTWEIGHT materials , *AEROSPACE industries , *MICROSTRUCTURE - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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