The key preparation technology of high-end high-strength aluminum alloy melting and casting is the key to improve the comprehensiveness of materials.
Release time:
2024-02-21
Modern aluminum alloy materials are developing in the direction of high comprehensive performance, low density, large size, high uniformity and material/structure integration, providing support for high-performance manufacturing of aerospace, transportation and high-end equipment. High comprehensive performance aluminum alloy is a hot spot in material science and engineering research of high strength aluminum alloy. As mentioned above, the development of new high-strength aluminum alloys and the improvement of the performance of existing materials are related to the innovation of aluminum alloy components.
However, when the composition is determined, the characteristic microstructure of high comprehensive performance needs to be obtained through a complex preparation process, during which the metallurgical genetic effect is significant, and each preparation link will affect the formation and evolution of the microstructure, thus finally determining the comprehensive performance and uniformity of the material. As shown in Figure 6, the important characteristics of the high-strength aluminum alloy material microstructure can be summarized as follows: in the Al matrix dispersion distribution of the formation of the micron crystal phase, high-temperature precipitation of the sub-micron or nano-dispersion phase, aging precipitation of the nano-metastable phase. The matrix structure can be summarized as solid solution, grain, subgrain, grain boundary/subgrain boundary, cellular structure, texture, no precipitation zone, vacancy and dislocation, etc. The multi-scale second phase and the complex structure of the matrix determine the properties of aluminum alloys. It is worth noting that in addition to the second phase, grain and other organizational structures, the texture of aluminum alloy materials is also a factor of concern to researchers.
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