Tribology International最新文献_第7页

Enhanced tribological performance via bio-inspired inclined micro-textures on TC6 titanium alloy under starved lubrication 利用仿生倾斜微织构提高TC6钛合金在饥饿润滑条件下的摩擦学性能

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-02 DOI: 10.1016/j.triboint.2025.111514

Guo Junde , Zhang Jiarui , Ni Yuquan , Zhang Yifan , Li Hui , Zhang Xinyun , Meng Junhu , Zhang Zhenyu

Under starved lubrication conditions, friction and wear severely limit the reliability and service life of mechanical components. Inspired by the distinctive inclined structure of a mud wasp nest, a biomimetic inclined micro-texture was designed on the surface of TC6 titanium alloy to enhance the tribological performance of sliding interfaces. The inclined textures were fabricated using femtosecond laser technology, which enables precise control of microstructure geometry. Experimental results demonstrated that the biomimetic inclined textures significantly improved the tribological behavior of the sliding interface. The lowest friction coefficient and wear rate were achieved when the laser processing incline angle was 20°, representing substantial reductions compared with the untextured surface. Finite element simulations further confirmed that the enhanced tribological performance originates primarily from increased hydrodynamic pressure and secondary lubrication effects induced by the inclined textures. This study provides new insights into texture-induced lubrication mechanisms and offers a promising strategy for the design of high-performance textured surfaces for aerospace and precision engineering applications.

在缺乏润滑条件下，摩擦和磨损严重限制了机械部件的可靠性和使用寿命。受泥浆马蜂窝独特的倾斜结构的启发，在TC6钛合金表面设计了仿生倾斜微纹理，以提高滑动界面的摩擦学性能。斜织构是利用飞秒激光技术制造的，该技术可以精确控制微观结构的几何形状。实验结果表明，仿生倾斜织构显著改善了滑动界面的摩擦学性能。当激光加工倾斜角为20°时，摩擦系数和磨损率最低，与无织构表面相比有显著降低。有限元模拟进一步证实了摩擦性能的增强主要源于斜织构引起的动水压力和二次润滑效应的增加。该研究为纹理诱导润滑机制提供了新的见解，并为航空航天和精密工程应用的高性能纹理表面设计提供了有前途的策略。

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引用次数: 0

Poly(N-octadecylacrylamide) oleogel: A versatile platform for constructing high-performance green lubricants 聚（n -十八烷基丙烯酰胺）油凝胶：构建高性能绿色润滑剂的多功能平台

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111515

Hua Xue , Qun He , Jiapeng He , Jianqiao Zhang , Fengchun Liang , Meirong Cai , Qiang Tian , Feng Zhou , Weifeng Bu

The development of high-performance and environmentally friendly lubricants is urgently required for modern industrial applications under variable, extreme conditions. Although polymer gels exhibit good self-healing properties and promising lubricity, their tribological performance under severe rubbing conditions remains limited. Introducing nanomaterials in the gels has been proven effective in reducing friction, resisting wear, and enhancing load-bearing capacity. In this study, a multifunctionalized, sulfur- and phosphorus-free oleogel platform based on poly(N-octadecylacrylamide) was developed by incorporating boronic ester comonomer and SiO₂ or TiO₂ nanoparticles through hydrogen-bonding interactions and dynamic B–O bonds in base oil. The resulting polymer–nanoparticle composites form stable oleogel networks, demonstrating excellent friction (up to 56 %) and wear-reducing properties (up to 96 % relative to the base oil) and exceptional load-bearing capacity (up to 1200–1500 N). Actually, the excellent lubricating properties are attributed to the in situ formation of protective tribofilms including B₂O₃, β-SiC, and TiC nanodomains on rubbing surfaces via trobochemical reactions. This work establishes a versatile strategy to design environmentally compatible oleogel lubricants for enhanced tribological performance even in severe, changeable lubrication conditions.

现代工业应用在多变的极端条件下，迫切需要开发高性能和环保的润滑剂。尽管聚合物凝胶具有良好的自愈性能和良好的润滑性，但其在严重摩擦条件下的摩擦学性能仍然有限。在凝胶中引入纳米材料已被证明在减少摩擦、抗磨损和提高承载能力方面是有效的。本研究在基础油中通过氢键作用和动态B-O键作用，将硼酯共聚单体与SiO2或TiO2纳米粒子结合，制备了一种多功能化、无硫无磷的聚n-十八烷基丙烯酰胺油凝胶平台。由此产生的聚合物-纳米颗粒复合材料形成稳定的油凝胶网络，具有优异的摩擦性能（高达56% %）和减少磨损性能（相对于基础油高达96% %），以及卓越的承载能力（高达1200-1500 N）。实际上，优异的润滑性能是由于摩擦表面通过摩擦化学反应原位形成的保护性摩擦膜，包括B2O3、β-SiC和TiC纳米畴。这项工作建立了一个通用的策略来设计环境相容的油凝胶润滑剂，即使在恶劣的、多变的润滑条件下也能提高摩擦学性能。

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引用次数: 0

Multi-physics coupling analysis of rolling electrical contact performances in flexures: Modeling and experiment 挠曲轧制电接触性能的多物理场耦合分析：建模与实验

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111513

Qiutong Hong , Xinwei Wang , Zhirui Rao , Chen Liu , Yanhu Zhang , Zhaoyu Chen , Shoudan Lv

The operational reliability of brushless slip rings is fundamentally governed by the current-carrying tribological behavior at flexure interfaces in rolling contact connectors (RCCs). However, the coupled electrical-thermal-mechanical-wear interactions in these systems remain poorly quantified, especially when enduring high local stress, current density, and Joule heating. This study bridges this gap through integrated multi-physics and experimental validation, specifically investigating how flexure materials and operating conditions govern contact degradation. A novel multi-physics coupled finite element model (FEM) was developed to simulate the interplay among dynamic contact stress, current densities, and temperature, accurately reproducing the nonlinear evolution of contact resistance with applied load. Computational results reveal that the critical load threshold for beryllium bronze electrical contacts is 10 N—at which point buckling failure occurs—and that resistance transitions from a rapid decrease to a gradual increase. A load of 5 N was identified as the optimal working range to achieve minimum contact resistance, optimize thermal management efficiency, and ensure structural stability. Experimental validation was performed using a custom high-precision tribometer capable of simultaneous current flow (0–30 A), dynamic contact resistance measurement (±1μΩ resolution), and in-situ temperature monitoring. Results revealed that beryllium bronze flexures exhibited superior electrical contact performance during rolling, with reduced wear, less fluctuation in contact resistance, and greater thermal stability. Under low-power conditions (<5 W), wear is predominantly affected by mechanical loading, followed by applied current and rotational speed. The demonstrated experimental-computational framework establishes a new paradigm for optimizing high-precision, high-reliability electrical contacts used in rotating power transmission systems.

无刷滑环的工作可靠性从根本上取决于滚动接触连接器（rcc）柔性界面的载流摩擦学行为。然而，在这些系统中，耦合的电-热-机械-磨损相互作用仍然很难量化，特别是在承受高局部应力、电流密度和焦耳加热时。本研究通过集成多物理场和实验验证来弥补这一差距，特别是研究弯曲材料和操作条件如何影响接触退化。建立了一种新的多物理场耦合有限元模型（FEM）来模拟动态接触应力、电流密度和温度之间的相互作用，准确地再现了接触电阻随外加负载的非线性演变。计算结果表明，铍青铜电触点的临界载荷阈值为10 n，此时发生屈曲破坏，电阻由快速下降过渡到逐渐增加。以5 N的负荷为最佳工作范围，实现最小接触电阻，优化热管理效率，保证结构稳定性。实验验证使用定制的高精度摩擦计进行，该摩擦计能够同时进行电流（0-30 a），动态接触电阻测量（±1μΩ分辨率）和现场温度监测。结果表明，铍青铜挠曲在轧制过程中表现出优异的电接触性能，磨损减少，接触电阻波动较小，热稳定性更好。在低功率条件下（<5 W），磨损主要受机械载荷的影响，其次是施加的电流和转速。所演示的实验计算框架为旋转动力传动系统中高精度、高可靠性电触点的优化建立了一个新的范例。

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引用次数: 0

Comprehensively enhanced strength-ductility and wear resistance of compositionally complex alloys via microstructure engineering: From lamellar to hierarchical heterostructures 通过显微组织工程全面提高复合合金的强度-延展性和耐磨性：从片层到分层异质结构

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111507

Yuanqi You , Liyuan Liu , Xin Wang , Lijing Zuo , Junpeng Li , Guangyuan Li , Zhaowen Teng , Zunyan Xu , Jianhong Yi , Caiju Li

Two-phase compositionally complex alloys (CCAs) offer high strength, but often suffer from limited ductility and poor wear resistance due to the low dislocation storage ability and insufficient damage resistance of their interfaces, which arise from mechanical incompatibility. To accelerate engineering applications, efforts should be made to synergistically enhance strength, ductility, and wear resistance. The strategy proposed in this study is to transform the original two-phase lamellar heterostructures (LH) into hierarchical heterostructures (HH) via microstructure engineering. The lamellae areas of HH-CCA maintain the two-phase skeleton of the LH-CCA but feature a bamboo structure, where FCC lamellae are joined by high-angle grain boundaries (GBs) and B2 lamellae by sub-GBs. The open areas contain equiaxed FCC and unrecrystallized B2 grains. Moreover, B2 particles precipitate within the FCC phases. Compared with the LH-CCA, the HH-CCA exhibits superior mechanical properties (yield strength: 801 MPa, tensile strength: 1579 MPa, fracture elongation: ∼21.1 %), owing to the comprehensive manifestation of the multiple advantages brought by the complex structures, including coupled GB and precipitation strengthening, stronger hetero-deformation-induced strengthening, transformed deformation mechanisms, improved dislocation multiplication and storage ability, and stress delocalization at interfaces. In addition, its wear resistance (average coefficient of friction: 0.482, wear rate: 0.945 × 10⁻⁴ mm³/N·m) is significantly enhanced by better stress distribution, increased interfacial strength, and reduced oxidation risk due to element redistribution. Microstructure engineering—without composition change—thus provides a cost-effective route to simultaneously optimize mechanical and tribological properties.

两相复合合金（CCAs）具有较高的强度，但由于力学不相容导致的位错存储能力低，界面抗损伤能力不足，导致其延展性有限，耐磨性差。为了加快工程应用，应努力协同提高强度、延展性和耐磨性。本研究提出的策略是通过微观结构工程将原有的两相片层异质结构（LH）转变为层次异质结构（HH）。HH-CCA的片层区域保持了LH-CCA的两相骨架，但具有竹状结构，其中FCC片层由高角晶界（GBs）连接，B2片层由亚GBs连接。开放区含有等轴FCC和未再结晶的B2晶粒。B2颗粒在FCC相内析出。与LH-CCA相比，HH-CCA的屈服强度为801 MPa，抗拉强度为1579 MPa，断裂伸长率为~ 21.1 %)，这是由于复合结构带来的多重优势的综合体现，包括耦合的GB和析出强化、更强的异质变形诱导强化、变形机制的转变、位错增殖和储存能力的提高以及界面处的应力离域。此外，其耐磨性（平均摩擦系数为0.482，磨损率为0.945 × 10−4 mm3/N·m）因应力分布较好、界面强度增加、元素重分配降低了氧化风险而显著增强。因此，在不改变成分的情况下，微观结构工程为同时优化机械性能和摩擦学性能提供了一条经济有效的途径。

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引用次数: 0

Multi-stage transfer film evolution and hydrogen emission govern the tribological behavior of highly hydrogenated diamond-like carbon film in vacuum 高氢化类金刚石膜在真空条件下的摩擦学行为受多级转移膜演化和氢发射的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111510

Zhihuang He , Pengfei Shi , Wendong Cai , Xingde Zhong , Huajie Xu , Chen Xiao , Steven E. Franklin , Yang Wang

Highly hydrogenated diamond-like carbon (H-DLC) film is a promising solid lubricant for space applications due to its super-low friction in vacuum, yet its practical use is limited by insufficient understanding of its lubrication failure mechanisms. To address this, we investigated the reciprocating sliding of a 440 C steel ball against H-DLC film in vacuum, analyzing the tribological behavior, transfer layer evolution, and hydrogen loss reaction. The friction process evolves through three stages. In the first stage, the transfer layer grows under severe hydrogen loss, resulting in a stable, low friction coefficient (∼0.004) accompanied by a high wear rate. The second stage is marked by the formation of bulges in the transfer layer and slowed hydrogen loss; following a sudden increase, the friction coefficient stabilizes at ∼0.009, and the wear rate drops significantly. In the final stage, the bulges collapse, transfer layer growth ceases, and hydrogen loss intensifies again, leading to a continuously increasing friction coefficient (>0.01) and a high wear rate. This study elucidates the mechanism behind the three-stage behavior and proposes that extending stage II through material and condition optimization can significantly improve lubrication life, providing essential insight for enabling the practical application of H-DLC films in space environments.

高氢化类金刚石（H-DLC）薄膜由于其在真空中的超低摩擦，是一种很有前途的空间固体润滑剂，但由于对其润滑失效机制的了解不足，其实际应用受到限制。为了解决这个问题，我们研究了440 C钢球在真空中与H-DLC膜的往复滑动，分析了摩擦学行为、传递层的演变和氢损失反应。摩擦过程经历了三个阶段。在第一阶段，传递层在严重的氢损失下生长，导致稳定的低摩擦系数（~ 0.004）伴随着高磨损率。第二阶段的特点是在传递层中形成凸起，氢的损失减慢；突然增大后，摩擦系数稳定在~ 0.009，磨损率显著下降。在最后阶段，凸块坍塌，传递层生长停止，氢损失再次加剧，摩擦系数持续增大（>0.01），磨损率较高。本研究阐明了三阶段行为背后的机制，并提出通过材料和条件优化延长第二阶段可以显著提高润滑寿命，为H-DLC膜在空间环境中的实际应用提供了重要的见解。

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引用次数: 0

Achieving maintenance-free durability of PI composite coatings through a hard-soft cross-scale synergistic structure 通过软硬跨尺度协同结构实现PI复合涂料免维护耐久性

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111509

Zihui Yu , Yan Wang , Qihua Wang , Yaoming Zhang , Zhancheng Zhang , Meizhe Yu , Xianqiang Pei

Carbon fibers were functionalized by metal-organic frameworks (MOFs), referred to as MCFs, through chemical self-polymerization and solvothermal reactions, and then combined with polytetrafluoroethylene (PTFE) to construct a hard-soft cross-scale synergistic structure, resulting in the preparation of polyimide (PI) composite coatings. Tribological tests were conducted under different conditions, after which the fundamental role of MCFs and PTFE in modifying the friction-reduction and anti-wear performance of PI was discussed based on in-depth characterization of the composite coatings' worn surface and transfer films formed on the counter steel surface. It was revealed that the MCFs/15PT/PI composite coating exhibited excellent tribological properties, which also exhibited high friction stability and wear resistance across varying loads and sliding speeds. Additionally, the composite coating was found to be potentially applicable for maintenance-free applications due to its excellent long-term tribological performance.

将碳纤维通过化学自聚合和溶剂热反应，将金属有机骨架（mfs）（简称MCFs）功能化，然后与聚四氟乙烯（PTFE）结合，构建软硬跨尺度协同结构，制备聚酰亚胺（PI）复合涂层。在不同条件下进行了摩擦学试验，在深入表征复合涂层磨损表面和在对钢表面形成的转移膜的基础上，探讨了mcf和PTFE在改性PI减摩抗磨性能中的根本作用。结果表明，MCFs/15PT/PI复合涂层具有优异的摩擦学性能，在不同载荷和滑动速度下均表现出较高的摩擦稳定性和耐磨性。此外，由于其优异的长期摩擦学性能，该复合涂层被发现可能适用于免维护应用。

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引用次数: 0

Designing A2/B2 modulated structure in AlxCo28Cr28Ni44-x high-entropy alloys to achieve unparalleled cavitation erosion resistance 在AlxCo28Cr28Ni44-x高熵合金中设计A2/B2调制结构，获得无与伦比的抗空化侵蚀能力

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111511

Haobo Cao , Guoliang Hou , Yicheng Wang , Junkai Ma , Yulong An , Xiaoqin Zhao , Hongqi Wan , Huidi Zhou , Jianmin Chen

Modulated structure exhibits remarkable effectiveness in enhancing the strength of metallic materials. However, its stringent preparation conditions pose challenges to its application in large-scale flow-passing components such as propellers and turbines, which require cavitation erosion (CE) protection. In this study, by continuously optimizing the elemental ratios and thermodynamic parameters, a modulated structure with uniformly distributed disordered (A2) and ordered (B2) body-centered cubic phases was successfully fabricated in Al_xCo₂₈Cr₂₈Ni_44-x high-entropy alloys (HEAs). As the value of x increased from 10 to 22, the phase structure transitioned sequentially: from FCC, to FCC + BCC, to FCC + A2/B2 modulated structure, and finally to a fully A2/B2 modulated structure. The pronounced periodic strain fields within the modulated structure consisting of A2 and B2 phases greatly limited the dislocation movement and promoted the dislocation storage capacity. This endowed the Al₂₂Co₂₈Cr₂₈Ni₂₂ HEA with exceptional compressive yield strength (1.89 GPa) and nanoindentation hardness (8.34 GPa), enabling it to withstand load shocks from bubble collapses without noticeable plastic deformation. Additionally, the coherent interface between A2 and B2 phases resulted in a minimal lattice misfit (∼1 %), which effectively suppressed dislocation accumulation at phase boundaries under cyclic load, thereby mitigating fatigue cracking. Consequently, the cast Al₂₂Co₂₈Cr₂₈Ni₂₂ HEA exhibited an ultra-long CE incubation period (30 h) and an unparalleled extremely low cumulative mass loss (0.2 mg after 40 h of CE). These findings provide a new approach for manufacturing high-performance materials with long-lasting CE resistance.

调制结构在提高金属材料强度方面表现出显著的效果。然而，其严格的制备条件对其在螺旋桨和涡轮机等需要保护空化侵蚀（CE）的大型通流部件中的应用提出了挑战。在本研究中，通过不断优化元素比和热力学参数，在AlxCo28Cr28Ni44-x高熵合金（HEAs）中成功制备了均匀分布的无序（A2）和有序（B2）体心立方相的调制结构。当x的值从10增加到22时，相结构依次发生转变：从FCC，到FCC + BCC，再到FCC + A2/B2调制结构，最后到完全A2/B2调制结构。在由A2和B2相组成的调制结构中，明显的周期性应变场极大地限制了位错的移动，提高了位错的存储能力。这使得Al22Co28Cr28Ni22 HEA具有优异的抗压屈服强度（1.89 GPa）和纳米压痕硬度（8.34 GPa），使其能够承受气泡崩溃带来的负载冲击而不会产生明显的塑性变形。此外，A2和B2相之间的相干界面导致最小的晶格错配（~ 1%），这有效地抑制了循环载荷下相边界处的位错积累，从而减轻了疲劳开裂。因此，铸态Al22Co28Cr28Ni22 HEA表现出超长的CE潜伏期（30 h）和无与伦比的极低累积质量损失（40 h后0.2 mg）。这些发现为制造具有持久CE阻力的高性能材料提供了新的途径。

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引用次数: 0

Dynamic response analysis of helical gear systems considering periodic surface waviness deviation 考虑周期性表面波度偏差的斜齿轮系统动态响应分析

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111512

Yu Wang , Guolong Li , Yan Li , Ziqian Liu , Bing Cao , Pengcheng Li

Tooth surface waviness (TSW) is a periodic manufacturing deviation, which has a critical influence on the vibration and noise of transmission systems. To accurately evaluate waviness effects on dynamic responses, this study proposes a coupled analytical model of the elastohydrodynamic lubrication (EHL) state and system vibration considering TSW. Firstly, a two-dimensional waviness deviation characterization method based on 2D-FFT and a reverse reconstruction interface for rough tooth surfaces are proposed. An efficient semi-analytical method is developed to address the normal contact issue for rough surfaces. Subsequently, the EHL analysis model is established to calculate internal dynamic excitations, including comprehensive time-varying meshing stiffness (TVMS) and quasi-static transmission error (QSTE) induced by TSW. Finally, a helical gear dynamic model that incorporates the effects of elastic and inertial forces caused by the instantaneous contact state changes of rough tooth surfaces is presented. The effectiveness of the proposed model is validated through quasi-static and dynamic experiments. Through a series of dynamic simulations, the waviness effects on dynamic responses under different operating conditions are investigated. Results show that TSW has significant effects on dynamic characteristics of helical gears. This study provides a theoretical foundation and technical support for gear quality control and fault diagnosis in gear transmission.

齿面波纹度是一种周期性制造偏差，对传动系统的振动和噪声有重要影响。为了准确评估波纹度对动力响应的影响，本文提出了考虑TSW的弹流动力润滑状态与系统振动的耦合分析模型。首先，提出了一种基于2D-FFT的二维波纹度偏差表征方法和粗糙齿面逆重构界面；提出了一种求解粗糙表面法向接触问题的有效半解析方法。随后，建立EHL分析模型，计算内部动力激励，包括TSW引起的综合时变啮合刚度（TVMS）和准静态传动误差（QSTE）。最后，建立了考虑粗糙齿面瞬时接触状态变化所引起的弹性力和惯性力影响的斜齿轮动力学模型。通过准静态和动态实验验证了该模型的有效性。通过一系列的动态仿真，研究了不同工况下波纹度对动力响应的影响。结果表明，TSW对斜齿轮的动态特性有显著影响。该研究为齿轮传动质量控制和故障诊断提供了理论基础和技术支持。

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引用次数: 0

Strengthening mechanism of heat treatment on Al-25Si based coating: Microstructure evolution, mechanical properties, and tribological behavior Al-25Si基涂层热处理强化机理：组织演变、力学性能和摩擦学行为

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111504

Tianshun Dong , Yuhang Zhen , Binguo Fu , Yanfei Jiang , Guolu Li

To further improve the wear resistance of high-silicon aluminum coatings, an Al-25Si/Al-5Mg/Cu-8P plasma sprayed coating was prepared. Subsequently, with the help of theoretical calculations, an optimized process parameters for heat treatment (solution + aging) were obtained, whereupon the coating was subjected to heat treatment. The influence and strengthening mechanism of heat treatment on the coating were revealed using SEM, TEM, XRD, mechanical properties testing, and wear experiments. The results showed that heat treatment improved the coating's compactness (the porosity decreased by 43.0 %), in particular, the alloying elements Cu and Mg were driven to diffuse from the Cu-8P splat and Al-5Mg splat to the entire coating, respectively, eventually forming dispersion strengthening of θ-Al₂Cu and solid solution strengthening of Mg. Under the combined effects of structural densification, dispersion strengthening, and solid solution strengthening, the heat-treated coating exhibited superior mechanical properties. The hardness (170.8 HV_0.2), elastic modulus (73.4 GPa), and fracture toughness (113.7 MPa·m^1/2) increased by 17.9 %, 15.6 %, and 3.8 times, respectively, compared to those of the sprayed coating (144.9 HV_0.2, 63.5 GPa, 23.9 MPa·m^1/2). The wear resistance of the heat-treated coating was significantly superior to that of the sprayed coating, with a 41.5 % reduction in wear rate and a decrease in friction coefficient. The main wear mechanism of sprayed coating included abrasive wear and fatigue wear, while, that of the heat-treated coating was mainly abrasive wear.

为进一步提高高硅铝涂层的耐磨性，制备了Al-25Si/Al-5Mg/Cu-8P等离子喷涂涂层。随后，通过理论计算，得到了最优的热处理工艺参数（固溶+时效），并对涂层进行热处理。通过SEM、TEM、XRD、力学性能测试和磨损试验，揭示了热处理对涂层的影响及其强化机理。结果表明：热处理提高了涂层的致密性（孔隙率降低了43.0 %），特别是合金元素Cu和Mg分别从Cu- 8p片和Al-5Mg片向整个涂层扩散，最终形成θ-Al2Cu的弥散强化和Mg的固溶强化；在组织致密化、分散强化和固溶强化的共同作用下，热处理涂层表现出优异的力学性能。硬度（170.8 HV0.2）、弹性模量（73.4 GPa）和断裂韧性（113.7 MPa·m1/2）分别比喷涂涂层（144.9 HV0.2、63.5 GPa、23.9 MPa·m1/2）提高17.9 %、15.6 %和3.8倍。热处理涂层的耐磨性明显优于喷涂涂层，磨损率降低41.5 %，摩擦系数降低。喷涂涂层的主要磨损机制为磨粒磨损和疲劳磨损，而热处理涂层的主要磨损机制为磨粒磨损。

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引用次数: 0

In-situ laser shock peening for the fabrication of micro-textured cutting tool and mechanistic study of wear resistance 原位激光冲击强化加工微织构刀具及其耐磨机理研究

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International

Pub Date : 2025-12-01 DOI: 10.1016/j.triboint.2025.111508

Jianping Wang , Shigang Tang , Ruoyu Zhou , Caijiang Wang , Gai Zhao , Ahmed Mohamed Mahmoud Ibrahim , Ammar Hamed Elsheikh , Liang Li , Xiuqing Hao

During the laser texturing process, the recast layer and heat-affected zone (HAZ) formed on the tool surface severely limit its tribological performance. This study innovatively proposes utilizing the recast layer and HAZ materials generated during texturing as the absorption layer for subsequent laser shock peening (LSP), achieving in-situ strengthening of micro-textured tools. The adverse effects of the recast layer and HAZ are effectively eliminated. Experimental results indicate that after in-situ LSP treatment on the micro-textured tool surface, the surface hardness reached a maximum of 21.9 GPa, and residual compressive stress of approximately −1800 MPa was introduced. Compared to the untreated tools, the micro-textured tools exhibited a 25 % reduction in the maximum friction coefficient and a 75.9 % decrease in wear rate. Cutting tests demonstrated that the enhanced micro-textured tools reduced adhesive wear and oxidative wear during titanium alloy machining, leading to more than a threefold increase in tool life.

激光变形加工过程中，刀具表面形成的重铸层和热影响区严重限制了刀具的摩擦学性能。本研究创新性地提出利用织构过程中产生的重铸层和热影响区材料作为后续激光冲击强化（LSP）的吸收层，实现微织构工具的原位强化。有效地消除了重铸层和热影响区带来的不利影响。实验结果表明，对微织化刀具表面进行原位LSP处理后，其表面硬度最高可达21.9 GPa，残余压应力约为−1800 MPa。与未处理的刀具相比，微织构刀具的最大摩擦系数降低了25% %，磨损率降低了75.9% %。切削试验表明，增强的微纹理刀具减少了钛合金加工过程中的粘着磨损和氧化磨损，使刀具寿命延长了三倍以上。

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