超高强度、可变形纳米晶 Al-Pd 合金

IF 9.4 1区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Plasticity Pub Date : 2025-04-09 DOI:10.1016/j.ijplas.2025.104330

X.Y. Sheng , Z.X. Shang , Y.F. Zhang , K. Xu , N.A. Richter , A.Y. Shang , H. Wang , X. Zhang

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Ultra-high strength, deformable nanocrystalline Al-Pd alloys

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Ultra-high strength, deformable nanocrystalline Al-Pd alloys

Strengthening of aluminum (Al) alloys is commonly achieved through precipitation by ageing. However, achieving well dispersed fine precipitates requires a meticulous heat treatment schedule. Here we report sputter-deposited nanocrystalline Al-Pd alloy with nanolaminates, mimicking the structure of vertically aligned nanocomposite (VAN). The nanolaminate consists of alternating Al-Pd solid solution and Al₄Pd intermetallic phase. The periodic composition fluctuation suggests the occurrence of spinodal decomposition. The Al-12.4Pd alloy exhibits a high flow stress of 2.2 GPa with significant work hardening ability, as evidenced by in situ micropillar compression tests performed in a scanning electron microscope. The unique VAN structure induced strengthening and deformation mechanisms are discussed. This study offers a fresh perspective for the design of high-strength deformable Al alloys.

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来源期刊

International Journal of Plasticity 工程技术-材料科学：综合

CiteScore

15.30

自引率

26.50%

发文量

256

审稿时长

46 days

期刊介绍： International Journal of Plasticity aims to present original research encompassing all facets of plastic deformation, damage, and fracture behavior in both isotropic and anisotropic solids. This includes exploring the thermodynamics of plasticity and fracture, continuum theory, and macroscopic as well as microscopic phenomena. Topics of interest span the plastic behavior of single crystals and polycrystalline metals, ceramics, rocks, soils, composites, nanocrystalline and microelectronics materials, shape memory alloys, ferroelectric ceramics, thin films, and polymers. Additionally, the journal covers plasticity aspects of failure and fracture mechanics. Contributions involving significant experimental, numerical, or theoretical advancements that enhance the understanding of the plastic behavior of solids are particularly valued. Papers addressing the modeling of finite nonlinear elastic deformation, bearing similarities to the modeling of plastic deformation, are also welcomed.