DOAJ Open Access 2024

Unexpected nucleation mechanism of T1 precipitates by Eshelby inclusion with unstable stacking faults

Shuo Wang Junsheng Wang Chengpeng Xue Xinghai Yang Guangyuan Tian +4 lainnya

Abstrak

Abstract Aluminum‐lithium (Al‐Li) alloy is one of the most promising lightweight structural materials in the aeronautic and aerospace industries. The key to achieving their excellent mechanical properties lies in tailoring T1 strengthening precipitates; however, the nucleation of such nanoparticles remains unknown. Combining atomic resolution HAADF‐STEM with first‐principles calculations based on the density functional theory (DFT), here, we report a counterintuitive nucleation mechanism of the T1 that evolves from an Eshelby inclusion with unstable stacking faults. This precursor is accelerated by Ag‐Mg clusters to reduce the barrier, forming the structural framework. In addition, these Ag‐Mg clusters trap the free Cu and Li to prepare the chemical compositions for T1. Our findings provide a new perspective on the phase transformations of complex precipitates through solute clusters in terms of geometric structure and chemical bonding functions.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Computer engineering. Computer hardware Technology (General)

Penulis (9)

Shuo Wang

Junsheng Wang

Chengpeng Xue

Xinghai Yang

Guangyuan Tian

Hui Su

Yisheng Miao

Quan Li

Xingxing Li

Format Sitasi

APA MLA BibTeX

Wang, S., Wang, J., Xue, C., Yang, X., Tian, G., Su, H. et al. (2024). Unexpected nucleation mechanism of T1 precipitates by Eshelby inclusion with unstable stacking faults. https://doi.org/10.1002/mgea.33

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Informasi Jurnal

Tahun Terbit: 2024
Sumber Database: DOAJ
DOI: 10.1002/mgea.33
Akses: Open Access ✓