IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-09 DOI: 10.1016/j.wear.2026.206524

Xiyuan Zhang , Dasheng Wei , Le Han , Tianxing Chai , Xiang Liu , Shun Yang

To address the challenges associated with fretting fatigue in aeroengine components, this study proposes a comprehensive analysis framework based on multiaxial damage criteria. The mechanical behavior of GH4169 arc dovetail joints is systematically investigated, and a corresponding life prediction model is developed. High-temperature fretting fatigue experiments, combined with multiple characterization techniques, are employed to acquire data on relative displacement, fracture morphology, surface wear, and elemental composition, thereby enabling an in-depth understanding of the damage evolution process. A three-dimensional finite element model of the arc dovetail structure is constructed, incorporating the Chaboche constitutive model to accurately capture stress-strain responses in critical regions of the tenon. A customized post-processing routine is implemented to visualize the multiaxial damage field. Based on the resulting damage distribution, a gradient-corrected life prediction method is proposed. The results indicate that the arc dovetail joint design effectively alters the stress distribution, thereby reducing fretting fatigue damage. Moreover, the proposed life prediction method demonstrates good physical relevance and prediction accuracy.

为了解决航空发动机部件的微动疲劳问题，本研究提出了一种基于多轴损伤准则的综合分析框架。系统研究了GH4169圆弧燕尾接头的力学行为，建立了相应的寿命预测模型。采用高温微动疲劳实验，结合多种表征技术，获取相对位移、断口形貌、表面磨损、元素组成等数据，深入了解损伤演化过程。利用Chaboche本构模型，建立了圆弧燕尾结构的三维有限元模型，准确捕捉了榫槽关键区域的应力应变响应。实现了自定义的后处理程序来可视化多轴损伤场。基于得到的损伤分布，提出了一种梯度校正寿命预测方法。结果表明，弧形燕尾接头设计有效地改变了应力分布，从而减少了微动疲劳损伤。此外，所提出的寿命预测方法具有良好的物理相关性和预测精度。

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引用次数: 0

Mechanical properties and tribological behavior of AlSi11Cu alloy manufactured by additive friction stir deposition and subsequent T6 treatment 添加搅拌摩擦沉积和T6处理制备的AlSi11Cu合金的力学性能和摩擦学行为

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-16 DOI: 10.1016/j.wear.2026.206535

Ziming Zeng , Yunyi Liu , Yidi Li , Hui Wang , Ruilin Lai , Yunping Li

The AlSi11Cu alloy is widely applied in automotive components, favored for its inherent wear resistance contributed by the dispersion of hard Si particles. However, the needle-like silicon phase and coarse iron-rich intermetallic compounds formed by traditional casting methods severely limit the mechanical properties and wear performance of the material. To address this issue, this work proposes additive friction stir deposition (AFSD) followed by T6 heat treatment as a novel and targeted microstructural control approach. The adopted AFSD + T6 approach yields a refined microstructure with fine equiaxed grains and spheroidized second phases, thereby improving both mechanical properties and wear resistance. Compared with the cast alloy, the AFSD + T6 alloy exhibited a 58.3 % increase in yield strength, a 48.3 % increase in ultimate tensile strength, and a 66.6 % improvement in ductility. The AFSD + T6 alloy exhibited significantly reduced friction coefficient and wear rate at both 70 N and 140 N, with wear rates reaching only 7.5 % and 8.7 % of that of the cast alloy. All sliding wear tests were conducted under boundary lubrication regime using a GCr15 steel ball as the counterface material to simulate the piston ring-cylinder liner contact. This improvement is primarily attributed to microstructural refinement and enhanced particle/matrix bonding, which effectively suppresses fatigue crack initiation and propagation. As a result, fatigue wear is mitigated, allowing the formation and retention of a protective oxide tribo-layer that shifts the dominant wear mechanism to oxidative wear, thereby further enhancing wear resistance.

AlSi11Cu合金被广泛应用于汽车零部件，其固有的耐磨性得益于硬Si颗粒的分散。然而，传统铸造方法形成的针状硅相和粗大的富铁金属间化合物严重限制了材料的力学性能和磨损性能。为了解决这一问题，本工作提出了添加剂搅拌摩擦沉积（AFSD），然后进行T6热处理，作为一种新的和有针对性的显微组织控制方法。采用AFSD + T6方法可获得细小的等轴晶粒和球化的第二相，从而提高机械性能和耐磨性。与铸态合金相比，AFSD + T6合金的屈服强度提高58.3%，极限抗拉强度提高48.3%，塑性提高66.6%。在70 N和140 N下，AFSD + T6合金的摩擦系数和磨损率均显著降低，磨损率仅为铸态合金的7.5%和8.7%。所有滑动磨损试验均在边界润滑状态下进行，采用GCr15钢球作为面材，模拟活塞环与缸套的接触。这种改进主要归因于微观组织的细化和增强的颗粒/基体结合，这有效地抑制了疲劳裂纹的萌生和扩展。因此，减缓了疲劳磨损，允许形成和保留保护性氧化摩擦层，将主要磨损机制转变为氧化磨损，从而进一步提高耐磨性。

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引用次数: 0

Deformation hardening mechanism of laser cladded medium manganese steel coating during wear process 激光熔覆中锰钢涂层磨损过程中的变形硬化机理

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-23 DOI: 10.1016/j.wear.2026.206511

Qingyue Meng , Haifeng Yang , Haiyu Liu , Hao Liu , Jingbin Hao , Songyong Liu

Medium-manganese steel (MMS) exhibits excellent conventional wear resistance, but its work-hardening ability is limited, resulting in brittle spalling and decrease its wear resistance under high load wear conditions. This study innovatively adopted laser cladding to prepare a MMS coating capable of sustained hardening under high load wear conditions. It analyzed the phase composition and microstructure of MMS coating. investigated the friction and wear properties of the coating under different wear loads and wear durations with a counter-ball made of Al₂O₃. The research results indicate that the deformation hardening mechanism of the coating is primarily dominated by Transformation Induced Plasticity (TRIP), with Twining Induced Plasticity (TWIP) providing synergistic strengthening. When the wear load was increased to 150 N, the strain hardening performance of the coating was fully exerted. At this point, the hardness of the wear track reached as high as 779.02 HV_0.1, while the hardness of the coating before wear was approximately 299.51 HV_0.1, it indicates that the MMS coating has excellent strain hardening capability. This study proposes the preparation of wear-resistant coatings using laser cladding MMS, which will provide a new solution to address the issue of insufficient wear resistance of MMS under high-stress conditions, a problem caused by its inadequate strain hardening capability.

中锰钢（MMS）具有优良的常规耐磨性，但加工硬化能力有限，在高负荷磨损条件下易发生脆性剥落，降低了其耐磨性。本研究创新性地采用激光熔覆技术制备了高负荷磨损条件下持续硬化的MMS涂层。分析了MMS涂层的相组成和显微组织。在不同的磨损载荷和磨损时间下，用Al2O3制球研究了涂层的摩擦磨损性能。研究结果表明：涂层的变形硬化机制主要以相变诱发塑性（TRIP）为主，孪晶诱发塑性（TWIP）起协同强化作用；当磨损载荷增加到150 N时，涂层的应变硬化性能得到充分发挥。此时，磨损迹的硬度高达779.02 HV0.1，而涂层磨损前的硬度约为299.51 HV0.1，表明MMS涂层具有优异的应变硬化能力。本研究提出利用激光熔覆MMS制备耐磨涂层，为解决MMS在高应力条件下由于应变硬化能力不足而导致耐磨性不足的问题提供了一种新的解决方案。

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引用次数: 0

Modeling and analysis of abrasive particles impact behavior in maskless abrasive air-jet machining at oblique impact angles 斜冲击角下无掩模磨料射流加工中磨料颗粒冲击行为的建模与分析

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-27 DOI: 10.1016/j.wear.2026.206562

Xinyue Jing , Guiguan Zhang , Xinzhao Ren , Ying Li , Yifan Sun , Yanhou Liu , Peng Yao , Yuli Sun , Yugang Zhao

Abrasive Jet Machining (AJM) is an advanced non-traditional machining technology that offers a distinct approach to material processing. AJM prevents abrasive embedding when applied to polydimethylsiloxane (PDMS) using maskless abrasive air-jet machining at oblique angles (MAJM-OA). However, fabricating microchannels with tailored structural features on PDMS surfaces remains a challenge. In this study, computational fluid dynamics (CFD) analysis is employed to investigate the evolution of abrasive impact behavior in impingement zones with varying microchannel structural characteristics. The results indicate that the stagnation zone promotes secondary rebounds of abrasive particles in deep channels, thereby enabling effective removal of sidewall erosion. MAJM-OA experiments demonstrate that microchannels with distinct structural characteristics can be fabricated by controlling the jet pressure and the number of machining passes. This study elucidates the underlying mechanisms governing microchannel structural evolution in MAJM-OA and presents a straightforward and cost-effective strategy for constructing a feature database for diverse microchannel profiles. These findings contribute significantly to the ultra-precision control of microchannel fabrication via MAJM-OA.

磨料射流加工（AJM）是一种先进的非传统加工技术，为材料加工提供了一种独特的方法。AJM防止磨料嵌入时，应用于聚二甲基硅氧烷（PDMS）使用无掩膜磨料射流加工在斜角（MAJM-OA）。然而，在PDMS表面上制造具有定制结构特征的微通道仍然是一个挑战。本研究采用计算流体力学（CFD）分析方法，研究了不同微通道结构特征的冲击区磨料冲击行为的演变。结果表明，滞止区促进了深沟道内磨粒的二次回弹，从而有效地消除了侧壁侵蚀。MAJM-OA实验表明，通过控制射流压力和加工道次，可以制备出具有不同结构特征的微通道。本研究阐明了MAJM-OA中控制微通道结构演变的潜在机制，并提出了一种简单而经济的策略，用于构建不同微通道配置文件的特征数据库。这些发现有助于通过MAJM-OA实现微通道制造的超精密控制。

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引用次数: 0

Investigation on the tribological performance of D-gun sprayed (FeCrNi)83(TiAl)17 high-entropy alloy-matrix composite coatings in vacuum environment over wide temperature range D-gun喷涂（FeCrNi）83(TiAl)17高熵合金基复合涂层在真空环境下宽温度范围的摩擦学性能研究

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-14 DOI: 10.1016/j.wear.2026.206533

Dongsheng Yang , Hanzhi Zhang , Yushan Geng , Rui Zhang , Qichun Sun , Wenyuan Chen , Jun Cheng , Juanjuan Chen , Shengyu Zhu , Peiqing La , Yong Yang

High-entropy alloy (HEA) self-lubricating coatings exhibit excellent mechanical properties and stable tribological performance, demonstrating potential applications in satellite solar array drive assemblies and foil air bearings within aerospace propulsion systems. This study utilized detonation spraying to fabricate coatings of (FeCrNi)₈₃(TiAl)₁₇, (FeCrNi)₈₃(TiAl)₁₇-Ag-BaF₂/CaF₂ and (FeCrNi)₈₃(TiAl)₁₇-Ag-BaF₂/CaF₂-Al₂O₃. The (FeCrNi)₈₃(TiAl)₁₇-Ag-BaF₂/CaF₂-Al₂O₃ coating, demonstrated the enhanced mechanical performance (surface hardness of 694.7 HV, cross-sectional hardness ranging from 634.3 to 674.3 HV) and maintained a stable friction interface. This coating demonstrated the ability to form a lubricating film over a broad temperature range in vacuum, effectively protecting the exposed worn surfaces at the contact interface. Compared to the (FeCrNi)₈₃(TiAl)₁₇ coating, the modified coating of (FeCrNi)₈₃(TiAl)₁₇-Ag-BaF₂/CaF₂-Al₂O₃ showed significantly reduced friction coefficient and wear rate under vacuum from room temperature (RT) to 600 °C, stabilizing at 0.26–0.46 and (1.3–3.6) × 10⁻⁵ mm³/(N·m), respectively. Notably, at RT, the wear rate of the (FeCrNi)₈₃(TiAl)₁₇-Ag-BaF₂/CaF₂-Al₂O₃ coating was reduced by a factor of 17 compared to the (FeCrNi)₈₃(TiAl)₁₇ coating.

高熵合金（HEA）自润滑涂层具有优异的机械性能和稳定的摩擦学性能，在卫星太阳能电池阵列驱动组件和航空航天推进系统中的箔式空气轴承中具有潜在的应用前景。采用爆轰喷涂法制备了（FeCrNi）83(TiAl)17、（FeCrNi）83(TiAl)17- ag - baf2 /CaF2和（FeCrNi）83(TiAl)17- ag - baf2 /CaF2- al2o3镀层。（FeCrNi）83(TiAl)17-Ag-BaF2/CaF2-Al2O3涂层的表面硬度为694.7 HV，截面硬度为634.3 ~ 674.3 HV，并保持了稳定的摩擦界面。该涂层证明了在真空中在很宽的温度范围内形成润滑膜的能力，有效地保护了接触界面上暴露的磨损表面。与（FeCrNi）83(TiAl)17涂层相比，（FeCrNi）83(TiAl)17- ag - baf2 /CaF2-Al2O3涂层在室温至600℃真空条件下的摩擦系数和磨损率显著降低，分别稳定在0.26 ~ 0.46和（1.3 ~ 3.6）× 10−5 mm3/（N·m）。值得注意的是，在室温下，（FeCrNi）83(TiAl)17- ag - baf2 /CaF2-Al2O3涂层的磨损率比（FeCrNi）83(TiAl)17涂层降低了17倍。

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引用次数: 0

Study on the evolution of braking interface friction behavior of high-speed trains under ice and snow conditions on long steep downhill lines 长陡坡线路冰雪条件下高速列车制动界面摩擦行为演化研究

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-19 DOI: 10.1016/j.wear.2026.206554

Zhicheng He , Hang Liu , Qixiang Zhang , Wei Chen , Aiguo Shi , Xiaocui Wang , Zhiyong Fan , Jiliang Mo

In high-altitude cold regions with long downhill lines, the friction braking system of high-speed trains is vulnerable to environmental disturbances and thermo-mechanical coupling, posing serious safety challenges. This study investigates the impact of snowy conditions on the tribological behavior of the braking interface. A scaled braking test rig was developed to simulate low-temperature snowy environments, and continuous drag braking tests were conducted under both room temperature (RT) and ice and snow (IS) conditions. Friction heat accumulation, friction coefficient evolution, wear morphology, and debris behavior were analyzed to clarify the governing factors of interfacial contact. The results show that IS condition markedly changed the thermal response and contact state of the friction pair. With rising temperature, the system shifts from ice-film lubrication to water-film lubrication and finally to dry friction. In the ice-film stage, the lubricating role of the ice film produces a much lower friction coefficient than under RT, while its heat absorption and dissipation capacities significantly suppress the temperature rise. As the ice melts, the interface becomes liquid-lubricated. The friction coefficient increases stepwise, lubrication remains unstable, and debris adhesion and re-entry intensify heat buildup, accelerating block temperature rise. Once the water film evaporates, dry friction dominates, with larger friction coefficient fluctuations and more severe furrow wear induced by sheared debris. This study improves understanding of braking interface evolution under snowy low temperatures and offers theoretical support for performance regulation and safety improvement in cold-region high-speed trains.

在高海拔寒冷、下坡线路较长的地区，高速列车摩擦制动系统容易受到环境干扰和热-力耦合的影响，安全性面临严峻挑战。本研究探讨了积雪条件对制动界面摩擦学行为的影响。研制了模拟低温雪地环境的规模化制动试验台，在室温和冰雪条件下进行了连续阻力制动试验。分析了摩擦热积累、摩擦系数演变、磨损形貌和碎屑行为，阐明了界面接触的控制因素。结果表明，IS条件显著改变了摩擦副的热响应和接触状态。随着温度的升高，系统由冰膜润滑转变为水膜润滑，最后转变为干摩擦。在冰膜阶段，冰膜的润滑作用产生的摩擦系数远低于RT，而其吸热和耗散能力则显著抑制了温度的升高。当冰融化时，界面变成液体润滑。摩擦系数逐步增大，润滑不稳定，碎屑附着和再入加剧了热量积聚，加速了块体温度的升高。水膜蒸发后，干摩擦占主导地位，摩擦系数波动较大，切屑引起的沟损更严重。该研究提高了对冰雪低温条件下制动界面演化的认识，为寒区高速列车的性能调控和安全改进提供了理论支持。

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引用次数: 0

Effect of normalising treatment on the microstructural characteristics and friction behaviour of U71Mn flash-butt-welded joints at extremely low temperatures 正火处理对U71Mn极低温闪焊接头组织特征和摩擦行为的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-14 DOI: 10.1016/j.wear.2026.206513

Tingting Liao , Xi Zhang , Jiehui Liu , Chenyang Zhu , Peng Su , Haoxiang Xu , Zhenchuan Wei , Biao Guo , Qibing Lv , Guoqing Gou

U71Mn rails, which are very prevalent in China's railway systems, must withstand extreme weather environments, but the cold-weather performance of their base metal and welded joints has not been systematically examined. To investigate the wear resistance and reliability of flash-welded joints in U71Mn rails in extremely low-temperature environments, this study examined the microstructure, mechanical properties, and service behaviour at various temperatures (20, 0, −20, and −40 °C) for U71Mn rail base metal, as-welded joints, and normalised joints. The results indicate that compared with the base metal, both the as-welded and normalised joints exhibit finer pearlite lamellar spacing. At zero and subzero temperatures, the friction coefficient decreased owing to the formation of a water film or thin ice layer from condensed water vapour. Simultaneously, lower temperatures reduced the severity of adhesive wear. However, embrittlement at low temperatures increased the wear rates in each microregion, thereby worsening the overall wear resistance. Taken together, these findings were used to establish the influence of temperature on the dominant wear mechanism. This study provides essential data and theoretical guidance for applying flash welding to join rails operating in low-temperature environments, contributing to the reliability of railway transportation.

U71Mn钢轨在中国铁路系统中非常普遍，必须承受极端天气环境，但其母材和焊接接头的寒冷天气性能尚未得到系统检查。为了研究U71Mn钢轨闪焊接头在极低温环境下的耐磨性和可靠性，本研究检查了U71Mn钢轨母材、焊接接头和正火接头在不同温度（20、0、- 20和- 40℃）下的显微组织、机械性能和使用行为。结果表明：与母材相比，焊接态和正火态接头的珠光体片层间距更小；在零度和零度以下的温度下，由于凝结的水蒸气形成水膜或薄冰层，摩擦系数减小。同时，较低的温度降低了胶粘剂磨损的严重程度。然而，低温下的脆化增加了每个微区域的磨损率，从而降低了整体耐磨性。综上所述，这些发现被用来确定温度对主要磨损机制的影响。该研究为在低温环境下应用闪光焊连接钢轨提供了必要的数据和理论指导，有助于提高铁路运输的可靠性。

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引用次数: 0

Transient wear prediction and optimization for water-lubricated stave bearings 水润滑壁轴承瞬态磨损预测与优化

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-09 DOI: 10.1016/j.wear.2025.206483

Juan Guo , Ke Xiao , Dongxing Tang

To fill the research gap on the wear behavior of water-lubricated stave bearings (WLSBs) under mixed lubrication conditions, a transient friction–wear model was developed by coupling a transient mixed lubrication model with a transient wear model, incorporating cavitation effects and evolving surface roughness. Two wear models—a modified Archard wear model and a frictional fatigue wear model—were evaluated, showing higher predictive accuracy of the fatigue-based wear model compared with experimental results. Based on this framework, two single-parameter optimization strategies targeting curvature radius and inclination angle of staves were proposed, and their sensitivity to key parameters (number of staves and stave width ratio) was analyzed. Subsequently, a dual-parameter optimization was conducted, and its effectiveness in performance improvements was quantitatively assessed. The results indicate that a negative stave curvature radius coefficient (concave staves) combined with a small number of staves (≤8) and a large stave width ratio (≥0.8), or a moderate inclination angle (0.01°–0.04°) with commonly used stave numbers (6-10) across a wide range of width ratios, can enhance the mixedlubrication and anti-wear performance of WLSBs compared with untreated ones. Moreover, the findings reveal that dual-parameter optimization outperforms single-parameter strategies, particularly in wear reduction, achieving an additional 19–42 % decrease in wear volume under the current operating conditions. This work provides meaningful insights into the design of high-performance water-lubricated bearing systems in engineering applications.

为了填补混合润滑条件下水润滑壁板轴承磨损行为研究的空白，将瞬态混合润滑模型与瞬态磨损模型耦合，建立了考虑空化效应和表面粗糙度变化的瞬态摩擦磨损模型。对两种磨损模型——改进的Archard磨损模型和摩擦疲劳磨损模型进行了评估，结果表明疲劳磨损模型的预测精度高于实验结果。在此框架下，提出了两种以壁板曲率半径和倾角为目标的单参数优化策略，并分析了其对关键参数（壁板数和壁板宽比）的敏感性。随后，进行了双参数优化，并定量评估了其在性能改进方面的有效性。结果表明：与未处理的壁板相比，采用负的壁板曲率半径系数（凹壁）、小的壁板数（≤8）和大的壁板宽比（≥0.8）相结合，或在宽比范围内采用常用的壁板数（6 ~ 10）、适度的倾角（0.01°~ 0.04°）相结合，可以提高壁板的混合润滑和抗磨性能。此外，研究结果表明，双参数优化策略优于单参数优化策略，特别是在减少磨损方面，在当前运行条件下，可将磨损量减少19 - 42%。这项工作为工程应用中高性能水润滑轴承系统的设计提供了有意义的见解。

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引用次数: 0

Effect of sliding speed and sliding distance on the wear and friction behaviour of LM6-1.5 wt% Si3N4 nanocomposite 滑动速度和滑动距离对LM6-1.5 wt% Si3N4纳米复合材料磨损摩擦性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-13 DOI: 10.1016/j.wear.2026.206532

Debayan Mandal , Sudip Banerjee , Ranjan Basak , Joyjeet Ghose

Aluminium based nanocomposites are promising candidates for different automotive parts like brake discs, clutch plates, cams and aerospace components like actuator joints, landing gear bushings, rotors, etc., where high strength-to-weight ratio and dry sliding wear resistance are critically important. Since these components frequently get exposed to dry sliding tribological environments like high sliding speed as well as longer sliding distance, understanding their dry sliding wear and friction characteristics is essential for reliable material design and performance of these components. Therefore, the purpose of the current study is to examine the effect of sliding speeds and distances on dry sliding tribological response on LM6-1.5 wt% Si₃N₄ nanocomposite. Nanocomposite is synthesized through ultrasonic assisted stir casting (USC). Microstructural characterizations are evaluated through optical microscopy, FESEM, EDX, XRD and elemental mapping to assess successful incorporation and distribution of Si₃N₄ Nanoparticles. Pin-on-disc experiment is conducted by using EN31 steel disc as the counterface across sliding speed and distance ranging between 0.25 and 1.25 m/s and 300–3000 m respectively. Incorporation of Si₃N₄ nanoparticles enhanced wear resistance around 30–40 % compared to base alloy under experimental conditions, indicating improved load-bearing ability and resistance to plastic deformation. Worn surfaces and wear debris are further analyzed through FESEM and EDX to evaluate the primary wear mechanisms. Typical observation of worn surfaces depicts how particle incorporation suppresses delamination as well as adhesion and shifts towards abrasion. This mechanistic change renders a new approach for tailoring material design in tribological applications.

铝基纳米复合材料是不同汽车部件的有希望的候选者，如刹车盘、离合器片、凸轮和航空航天部件，如致动器接头、起落架衬套、转子等，其中高强度重量比和干滑动耐磨性至关重要。由于这些部件经常暴露在干滑动摩擦环境中，如高滑动速度和较长的滑动距离，因此了解其干滑动磨损和摩擦特性对于可靠的材料设计和这些部件的性能至关重要。因此，本研究的目的是研究滑动速度和距离对LM6-1.5 wt% Si3N4纳米复合材料干滑动摩擦学响应的影响。采用超声辅助搅拌铸造法制备了纳米复合材料。通过光学显微镜，FESEM， EDX， XRD和元素映射来评估Si3N4纳米颗粒的成功掺入和分布。销盘实验采用EN31钢盘作为界面，滑动速度为0.25 ~ 1.25 m/s，滑动距离为300 ~ 3000 m。在实验条件下，Si3N4纳米颗粒的加入使基合金的耐磨性提高了30 - 40%，表明其承载能力和抗塑性变形能力得到了提高。通过FESEM和EDX进一步分析磨损表面和磨损碎片，以评估主要磨损机制。对磨损表面的典型观察描述了颗粒掺入如何抑制分层以及粘附并转向磨损。这种机理的变化为在摩擦学应用中裁剪材料设计提供了一种新的方法。

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引用次数: 0

Using electrochemical noise EN to investigate the tribocorrosion behaviour of Ti27.78Zr27.78Hf27.78Nb8.33Ta8.33 at% HEA 采用电化学噪声EN研究了Ti27.78Zr27.78Hf27.78Nb8.33Ta8.33在% HEA下的摩擦腐蚀行为

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-03-15 Epub Date: 2026-01-10 DOI: 10.1016/j.wear.2025.206494

Righdan M. Namus , W Mark Rainforth

Commonly used metallic biomaterials exhibit significant disadvantages, including releasing toxic metallic ions from CoCrMo alloy and the insufficient wear resistance of Ti-based alloys. This underscores the need for enhanced metallic materials for orthopedic applications. The optimal material must exhibit superior mechanical properties, high corrosion resistance, biocompatibility, and, crucially, exceptional tribocorrosion resistance. High Entropy Alloys (HEAs) are promising for fulfilling these requirements due to their remarkable combination of features that may be customised for individual purposes. The Ti_27.78Zr_27.78Hf_27.78Nb_8.33Ta_8.33 at% HEA has garnered interest as a promising candidate for orthopedic applications. This alloy demonstrates outstanding electrochemical performance. However, a comprehensive investigation into its tribocorrosion behaviour has yet to be conducted. The current study employed the Electrochemical Noise (EN) technique to analyze the tribocorrosion behaviour of the alloy in simulated body fluid at 37 °C. The findings indicate that the alloy demonstrates similar tribocorrosion performance when compared to its competitors. Additionally, the examination of the surface status after performing the tribocorrosion tests revealed a marked decrease in corrosion resistance.

常用的金属生物材料存在CoCrMo合金释放有毒金属离子、ti基合金耐磨性不足等缺点。这强调了骨科应用对增强金属材料的需求。最佳材料必须具有优异的机械性能，高耐腐蚀性，生物相容性，以及至关重要的特殊耐摩擦腐蚀性能。高熵合金（HEAs）有望满足这些要求，因为它们具有显著的特征组合，可以根据个人目的进行定制。Ti27.78Zr27.78Hf27.78Nb8.33Ta8.33 at% HEA作为一种有前途的骨科应用候选材料而引起了人们的兴趣。这种合金具有优异的电化学性能。然而，对其摩擦腐蚀行为的全面调查尚未进行。本研究采用电化学噪声（EN）技术分析了合金在37℃模拟体液中的摩擦腐蚀行为。研究结果表明，与竞争对手相比，该合金具有相似的摩擦腐蚀性能。此外，在进行摩擦腐蚀测试后，对表面状态的检查显示耐腐蚀性显着下降。

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