Ultrahigh-strength Cu-10Fe-0.2Mg in situ composites via ultra-nano precipitation within nanolamellar architectures

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-06-16 DOI:10.1016/j.vacuum.2025.114511

W. Chen , X.N. Hu , J. Jiang , J.W. Wang , J.L. Guo , D. Wu , J. Zou , Z. Hu , Q. Hu

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引用次数: 0

Abstract

Cu-Fe in situ composites face Hall-Petch strengthening saturation when Fe filaments reach nanoscale dimensions. The present study addresses this limitation through a strategy of “ultra-nano precipitation within nanolamellar architectures”. By adding 0.2 wt% Mg to a Cu-10Fe alloy and applying multi-stage thermo-mechanical processing, a Cu-10Fe-0.2Mg in situ composite was developed, featuring ultrafine CuMg₂ nanoprecipitates (∼6.8 nm) embedded in the Cu nanolamellar matrix. This optimized material achieves a 23 % strength enhancement compared to its Mg-free counterpart, while retaining 96 % of the base conductivity and comparable uniform elongation. The improvement in mechanical properties can be attributed to the Orowan strengthening effect from the introduced CuMg₂ nanoprecipitates and their ability to promote work hardening. This ultra-nano precipitation within nanolamellae strategy is envisaged to be readily adaptable to other Cu-bcc in situ composites, offering broad implications for next-generation material engineering.

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基于纳米层状结构的超高强度Cu-10Fe-0.2Mg原位复合材料

Cu-Fe原位复合材料在铁长丝达到纳米尺度时面临Hall-Petch强化饱和。本研究通过“纳米层状结构中的超纳米沉淀”策略解决了这一限制。通过在Cu- 10fe合金中添加0.2 wt%的Mg，并进行多阶段热机械加工，制备了Cu- 10fe -0.2Mg原位复合材料，其超细CuMg2纳米沉淀物（~ 6.8 nm）嵌入Cu纳米层状基体中。与无镁材料相比，这种优化材料的强度提高了23%，同时保持了96%的基本导电性和相当的均匀伸长率。其力学性能的改善可归因于引入的CuMg2纳米沉淀物的Orowan强化效应及其促进加工硬化的能力。这种纳米层内的超纳米沉淀策略被设想为很容易适用于其他Cu-bcc原位复合材料，为下一代材料工程提供广泛的影响。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.