Enhanced mechanical properties and corrosion resistance synergy of multi-layered aluminum sheets fabricated with interlayer

Z. Yuan, Y. Lu, Y. Jiang, X. Wang ORCID logo , Z. Ni, Y. Tu, J. Peng, Z. Liu, Q. Zhang, P. Wang, Y. Peng показать трудоустройства и электронную почту
Получена 18 июня 2025; Принята 22 сентября 2025;
Эта работа написана на английском языке
Цитирование: Z. Yuan, Y. Lu, Y. Jiang, X. Wang, Z. Ni, Y. Tu, J. Peng, Z. Liu, Q. Zhang, P. Wang, Y. Peng. Enhanced mechanical properties and corrosion resistance synergy of multi-layered aluminum sheets fabricated with interlayer. Письма о материалах. 2025. Т.15. №4. С.236-248
BibTex   https://doi.org/10.48612/letters/2025-4-236-248

Аннотация

Combining first-principles calculations with experimental results, it is demonstrated that the middle layer of multi-layered aluminum sheets serves as an effective barrier, preventing the diffusion of Si into the core layer. This significantly enhances both the mechanical strength and corrosion resistance of the material.This study systematically investigates the dual enhancement of mechanical properties and corrosion resistance in multi-layered aluminum sheets achieved through the introduction of an interlayer. The interlayer serves as an effective diffusion barrier during the brazing process, significantly impeding the inward migration of Si atoms from the clad layer into the AA3xxx core. This mitigation of Si diffusion not only preserves the microstructural integrity of the core layer but also reduces the risk of intergranular corrosion. Furthermore, natural aging promotes the precipitation of Guinier−Preston (GP) zones within the core matrix, contributing substantially to yield strength improvement through coherent precipitation hardening. First-principles calculations based on the density functional theory were employed to analyze the relatively stable atomic structure and the bonding mechanism of GP zones. The maximum in work of adhesion (Wad) appears in the Al(010) / MgSi(010) B-C interface. The strength of bond between Al and Si atoms in the Al(010) / MgSi(010) interface is stronger than that in Al(010) / Al2MgSi(001) and Al(010) / Al6MgSi(001) interfaces. Additionally, electronic structure and work function analyses demonstrated that the potential difference between the GP zones and the surrounding Al matrix is minimal, thereby suppressing micro-galvanic corrosion. As a result, the multi-layered aluminum sheets exhibit significant enhancements in both mechanical strength and corrosion resistance.

Ссылки (39)

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Финансирование на английском языке

1. National Natural Science Foundation of China - 52475347
2. Program for Science & Technology Innovation Talents in Universities of Henan Province - 24HASTIT045
3. Key Research and Development Projects in Henan Province - 251111222600
4. Key Scientific Research Projects in Higher Education Institutions in Henan Province - 25A430030
5. Scientific and Technological Key Project in Henan Province - 252102231035