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铜合金腐蚀-磨损-疲劳耦合损伤研究进展

Research progress on coupled corrosion-wear-fatigue damage in copper alloys

  • 摘要: 具有优异综合性能的铜合金在海洋环境关键部件中扮演着不可替代的角色,然而其进一步应用仍受到腐蚀损伤、腐蚀-磨损与腐蚀-疲劳耦合损伤的严重制约。深入理解损伤行为与微观结构之间的内在关联,以及腐蚀与磨损、腐蚀与疲劳之间的协同机制,具有重要的研究意义。本文系统评述了典型析出强化与固溶强化型Cu-Al及Cu-Ni基合金在腐蚀、腐蚀-磨损与腐蚀-疲劳方面的研究进展,阐明了不同微观结构(包括晶体结构、析出相、孪晶及无沉淀区等)对损伤机制的影响。聚焦于耦合作用机理,从微观结构特征与摩擦学参数(载荷、速度、时间、距离)及疲劳参数(应变幅值、应力幅值)的角度,揭示了铜合金在多场耦合条件下的非线性协同损伤行为。此外,系统评估了当前提升铜合金耐腐蚀、抗腐蚀-磨损与抗腐蚀-疲劳性能的主流工艺策略,如合金化、热处理与塑性变形等,分析其优劣,为新型耐损伤铜合金的设计与开发提供理论依据与技术路径。最后,总结了耦合损伤研究常用的表征手段与研究策略,展望了整合上述技术以探明铜合金复杂耦合损伤演化的潜力与现存挑战。

     

    Abstract: Copper alloys with excellent comprehensive properties play an irreplaceable role in key marine service components. Nevertheless, their wider application is severely restricted by single corrosion damage, coupled corrosion-wear damage and coupled corrosion-fatigue damage. Deep insight into the intrinsic correlation between damage behaviors and microstructures, as well as the synergistic interaction mechanisms between corrosion and wear, and between corrosion and fatigue, bears important research value. This review systematically summarizes the research advances regarding corrosion, corrosion-wear and corrosion-fatigue behaviors of typical precipitation-hardened and solid-solution-hardened Cu-Al and Cu-Ni base alloys, and clarifies the influences of diverse microstructural features (crystal structures, precipitated phases, annealing twins and precipitate-free zones) on damage mechanisms. Focusing on coupling interaction mechanisms, it reveals the nonlinear synergistic damage behaviors of copper alloys under multi-field coupling conditions from the perspectives of microstructural characteristics, tribological parameters (load, sliding velocity, testing duration, sliding distance) and fatigue parameters (strain amplitude, stress amplitude). In addition, this paper systematically evaluates mainstream process strategies for improving the resistance of copper alloys against corrosion, corrosion-wear and corrosion-fatigue, including alloying, heat treatment and plastic deformation. The advantages and drawbacks of each strategy are analyzed, which provides theoretical foundations and technical routes for the design and development of novel damage-resistant copper alloys. Finally, this work sorts out common characterization techniques and research methodologies adopted in coupled damage investigations, and prospects the potential and existing challenges of integrating these technologies to clarify the complex coupled damage evolution of copper alloys.

     

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