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Microscopic wear mechanism of sub-micron crystals in M50NiL carburized layer M50NiL渗碳层亚微米晶体的微观磨损机理

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-28 DOI: 10.1016/j.wear.2026.206567

Zifeng Ding , Jiaxu Guo , Lina Zhou , Xinghong Zhang , Xinxin Ma

In this study, the grain size of the near-surface layer in carburized steel is refined to the submicron level by adjusting the parameters of carburizing heat treatment. The tribological test results indicate that the formation of a submicron-grained carburized layer reduces the average coefficient of friction from 0.75 to 0.54 and decreases the wear volume by approximately 40 %. Compared to the sample with non-sub-micron crystal region (NSMCR), the sample with sub-micron crystal region (SMCR) exhibits less severe oxidative and adhesive wear, along with narrower and shallower wear tracks. The microscopic wear mechanisms of the wear tracks are examined through a combination of focused ion beam (FIB) sample preparation, transmission electron microscopy (TEM), and transmission Kikuchi diffraction (TKD). The carbides within the carburized layer of M50NiL steel provide structural support to the matrix, with notable deformation and increased dislocation density observed in surface carbides. Under cyclic loading during the tribological process, the surface grains in the carburized layer of M50NiL steel undergo nanocrystallization, significantly enhancing the surface hardness and mitigating further wear of the matrix. The SMCR sample exhibits a higher density of dispersed carbides and a greater degree of martensitic nanocrystallization in the wear layer, accompanied by reduced texture intensity. This is attributed to the enhanced precipitation of temper carbides promoted by the abundant grain and subgrain boundaries in the carburized layer of SMCR, which refines the martensite grains, improves the resistance to plastic deformation, and increases the randomness of grain orientation. By contrast, the wear track of the NSMCR sample exhibits stronger texture, with the long axes of martensite grains aligned parallel to each other and perpendicular to the sample surface. This alignment reduces the ability of the subsurface layer to resist crack propagation during wear.

本研究通过调整渗碳热处理工艺参数，将渗碳钢近表层的晶粒细化到亚微米级。摩擦学试验结果表明，亚微米级渗碳层的形成使平均摩擦系数从0.75降低到0.54，磨损体积减小约40%。与非亚微米晶体区（NSMCR）样品相比，亚微米晶体区（SMCR）样品表现出较轻的氧化磨损和粘着磨损，并且磨损痕迹更窄、更浅。通过聚焦离子束（FIB）样品制备、透射电子显微镜（TEM）和透射菊池衍射（TKD）相结合的方法研究了磨损轨迹的微观磨损机制。M50NiL钢渗碳层内的碳化物为基体提供了组织支撑，表面碳化物显著变形，位错密度增大。在循环加载过程中，M50NiL钢渗碳层表面晶粒发生纳米晶化，显著提高了表面硬度，减轻了基体的进一步磨损。SMCR试样在磨损层中具有较高的分散碳化物密度和较大程度的马氏体纳米晶化，织构强度降低。这是由于SMCR渗碳层中丰富的晶界和亚晶界促进回火碳化物析出，使马氏体晶粒细化，提高了抗塑性变形能力，增加了晶粒取向的随机性。相比之下，NSMCR试样的磨损轨迹显示出更强的织构，马氏体晶粒的长轴排列相互平行，垂直于试样表面。这种排列降低了亚表层在磨损过程中抵抗裂纹扩展的能力。

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引用次数: 0

Effect of composition variation on the tribological behavior of PAI-based solid lubricant coatings 组分变化对pai基固体润滑剂涂层摩擦学性能的影响

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-28 DOI: 10.1016/j.wear.2026.206565

Sung-Jun Lee , Chan-Woo Kim , Hye-Min Kwon , Hee Sup Shin , Yool Koo Kim , Chang-Lae Kim

This study investigated the tribological behavior of polyamide-imide (PAI) composite coatings containing various combinations of solid lubricants (graphite and activated carbon), silicon nitride, and epoxy binders. Eight different coating formulations were prepared and tested under low (200 mN) and high (200 N) load conditions. Surface analysis showed that the graphite formulations displayed plate-like structures, whereas the activated carbon formulations exhibited irregular, porous textures. Pure carbon coatings demonstrated excellent friction stability but poor wear resistance under high loads. The addition of silicon nitride and epoxy improved wear resistance, with 1.2 wt% carbon formulations reducing wear depth by up to 61 % and wear rate by up to 60 % compared to pure carbon formulations. An inverse relationship between the carbon content and wear resistance was observed. The wear mechanisms differed between graphite (delamination and platelet exfoliation) and activated carbon formulations (selective phase removal and plastic deformation). These results demonstrate that optimal tribological performance depends on the balance between the carbon content, additive interactions, and processing parameters.

本研究研究了含有固体润滑剂（石墨和活性炭）、氮化硅和环氧粘合剂的各种组合的聚酰胺-亚胺（PAI）复合涂层的摩擦学行为。制备了8种不同的涂层配方，并在低（200 mN）和高（200 mN）负载条件下进行了测试。表面分析表明，石墨配方表现为片状结构，而活性炭配方表现为不规则的多孔结构。纯碳涂层在高负荷下表现出优异的摩擦稳定性，但耐磨性差。氮化硅和环氧树脂的加入提高了耐磨性，与纯碳配方相比，1.2 wt%的碳配方可将磨损深度降低61%，磨损率降低60%。碳含量与耐磨性呈反比关系。石墨（分层和血小板剥落）和活性炭配方（选择性相去除和塑性变形）的磨损机制不同。这些结果表明，最佳的摩擦学性能取决于碳含量、添加剂相互作用和加工参数之间的平衡。

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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 : 2026-01-27 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

Tribological compatibility investigation of multiwall carbon nanotubes/nickel coatings sliding against silicon nitride under dry friction and oil lubrication 干摩擦和油润滑条件下多壁碳纳米管/镍涂层与氮化硅的摩擦学相容性研究

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-26 DOI: 10.1016/j.wear.2026.206564

Lupeng Wu , Haifeng Xue , Ke Zhang , Tianxiang Li , Wei Gao , Le Gu , Yongtao Zhang

Multiwall carbon nanotubes reinforced nickle (MWCNTs/Ni) coatings were electrodeposited in electrolyte solution containing carboxylated MWCNTs with dimensions of 285–427 nm. Surface morphology and hardness analysis determined 3 g/L MWCNTs as the optical addition concentration under low current density of 1 Adm⁻². Based on friction and wear behaviors, the tribological compatibility of Ni coating sliding against silicon nitride was improved by using MWCNTs as lubrication reinforcements. 50.6 and 44.4 % of friction and wear reduction was achieved under dry friction at 1214 MPa and 0.089 m/s while 35.8 % and 24.2 % of that was accomplished under oil lubrication. Micro-protrudes containing MWCNTs were crushed because of the high contact stress caused by coarse surface during sliding and hereby MWCNTs were released into oil. The improved tribological properties were attributed to the synergistic mechanism of MWCNTs serve as solid lubricants inside coatings and lubrication additives in oil.

在含有尺寸为285-427 nm羧化MWCNTs的电解质溶液中电沉积多壁碳纳米管增强镍（MWCNTs/Ni）涂层。表面形貌和硬度分析确定，在1 Adm−2低电流密度下，光学添加浓度为3g /L MWCNTs。基于摩擦磨损行为，采用MWCNTs作为润滑增强剂，改善了Ni涂层与氮化硅的摩擦相容性。在1214 MPa和0.089 m/s的干摩擦条件下，摩擦磨损减少率分别为50.6%和44.4%，而油润滑条件下的减少率分别为35.8%和24.2%。含有MWCNTs的微突起在滑动过程中由于表面粗糙而产生高接触应力而被压碎，MWCNTs释放到油中。MWCNTs作为涂层内部的固体润滑剂和油中润滑添加剂的协同作用，提高了涂层的摩擦学性能。

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引用次数: 0

Tribological mechanisms of modified C/C-SiC composite discs: A comparison of copper-containing semi-metallic and copper-free friction pads 改性C/C- sic复合材料摩擦片的摩擦学机理：含铜半金属摩擦片与无铜摩擦片的比较

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-25 DOI: 10.1016/j.wear.2026.206555

Sitao Shi , Fuyuan Wang , Su Cheng , Guanghai Liu , Laifei Cheng

Investigating the tribological behavior of C/C-SiC against various friction linings is crucial for their advancement. In this study, SiC and graphite hybrid fillers were incorporated into C/C-SiC composites using slurry infiltration (SI) and precursor infiltration and pyrolysis (PIP) methods to modify the matrix and optimize the composition and microstructure. A full-scale dynamometer was used to investigate the tribological behavior of a C/C-SiC disc against copper-containing semi-metallic and copper-free pads. The results indicated that the average coefficient of friction (COF) for semi-metallic-based pads is 0.46, while that for copper-free pads is 0.38. The analysis of the worn surfaces revealed that the infiltrated micro-SiC and reaction-formed nano-SiC forming a multiscale SiC-phase substructure exhibit a "synergistic plowing effect" during friction. Copper-containing semi-metallic pads exhibit a combination of abrasive and adhesive wear, with metal oxidation being the primary cause of fading. The main oxidation products are CuO, Cu₂O, and Fe₂O₃. In contrast, copper-free pads primarily experience abrasive wear. The smaller debris form dense contact plateaus, which result in reduced wear loss.

研究C/C- sic与各种摩擦衬里的摩擦学行为对其发展至关重要。本研究采用浆液浸润法（SI）和前驱体浸润热解法（PIP）将SiC和石墨杂化填料掺入C/C-SiC复合材料中，对基体进行改性，优化其组成和微观结构。采用全尺寸测力仪研究了C/C- sic圆盘与含铜半金属和无铜垫片的摩擦学行为。结果表明：半金属基垫片的平均摩擦系数为0.46，无铜垫片的平均摩擦系数为0.38；对磨损表面的分析表明，渗透的微碳化硅和反应形成的纳米碳化硅形成多尺度sic相亚结构，在摩擦过程中表现出“协同犁效应”。含铜半金属衬垫表现出磨料和粘接磨损的组合，金属氧化是褪色的主要原因。主要氧化产物为CuO、Cu2O和Fe2O3。相比之下，无铜衬垫主要经历磨料磨损。较小的碎片形成密集的接触平台，从而减少磨损损失。

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引用次数: 0

Addition of Al anodizing waste in a commercial friction material in an industrial symbiosis perspective 工业共生视角下铝阳极氧化废料在工业摩擦材料中的添加

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-24 DOI: 10.1016/j.wear.2026.206553

G.S. Gehlen , F. Valentini , A.P. Nogueira , R. Masciocchi , A. Barbieri , G. Straffelini

This study investigates the incorporation of anodizing aluminum waste (AAW), primarily aluminum hydroxide, into commercial brake pad friction materials. Four formulations were evaluated: a reference benchmark, one with 12 % unsieved AAW, and two with 6 % and 12 % sieved AAW. Samples were produced by hot pressing and characterized in terms of wear, friction behavior, and particulate matter (PM) emissions using a sub-scale dynamometer and a 168-cycle braking protocol based on the AK Master standard. To assess the environmental implications of AAW addition and the associated drying step, a life cycle assessment (LCA) was also conducted. The results revealed that increasing AAW content led to larger friction coefficient fluctuations and higher sensitivity to pressure and sliding speed, with the 12 % AAW formulations showing the greatest instability. The mean coefficient of friction under mild braking conditions decreased with AAW incorporation. In terms of wear, the 6 % AAW formulation achieved performance comparable to the reference, whereas 12 % AAW increased pad wear; disc wear remained unaffected across all compositions. Importantly, PM emissions from AAW-containing materials were similar to or lower than those of the reference, regardless of AAW content or sieving. LCA demonstrated that replacing alumina with AAW consistently reduced environmental impacts across all categories. Overall, among the tested compositions, the 6 % AAW formulation provided the best compromise between tribological stability and environmental benefits, supporting both the technical feasibility and the sustainability potential of incorporating AAW into friction material manufacturing within an industrial symbiosis framework.

本研究探讨了阳极氧化废铝（AAW）（主要是氢氧化铝）在商用刹车片摩擦材料中的应用。评估了四种配方：一个参考基准，一个未经筛选的12%的AAW，两个分别筛选6%和12%的AAW。样品通过热压生产，并使用亚尺度测力仪和基于AK Master标准的168循环制动协议，对磨损、摩擦行为和颗粒物（PM）排放进行了表征。为了评估添加AAW及其相关干燥步骤的环境影响，还进行了生命周期评估（LCA）。结果表明，AAW含量的增加导致摩擦系数波动更大，对压力和滑动速度的敏感性更高，其中12%的AAW配方表现出最大的不稳定性。轻度制动条件下的平均摩擦系数随着AAW的加入而降低。在磨损方面，6% AAW配方达到了与参考配方相当的性能，而12% AAW增加了衬垫磨损；磁盘磨损在所有组合中都不受影响。重要的是，无论AAW含量或筛分如何，含AAW材料的PM排放量与参考材料相似或低于参考材料。LCA证明，用AAW代替氧化铝可以持续减少所有类别的环境影响。总体而言，在所测试的组合物中，6% AAW配方在摩擦学稳定性和环境效益之间提供了最佳折衷，支持在工业共生框架内将AAW纳入摩擦材料制造的技术可行性和可持续性潜力。

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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 : 2026-01-23 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

Immersion and proteins reduce nanowear damage of CoCrMo under AFM single-asperity reciprocating sliding 浸渍和蛋白质可降低AFM单轴往复滑动作用下CoCrMo的纳米磨损损伤

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-22 DOI: 10.1016/j.wear.2026.206557

Hwaran Lee , Jeremy L. Gilbert

This study investigated the environmental effect on the tribocorrosion behavior of cobalt chromium molybdenum (CoCrMo) alloy using atomic force microscopy (AFM)-based nano-tribology under three environmental conditions: (1) air, (2) phosphate-buffered saline (PBS), and (3) bovine serum albumin (BSA) in PBS. Cyclic single-line scratches (8 μm) were generated using an AFM diamond tip (nominal radius 340 nm) under normal forces ranging from 137 to 170 μN (14.1–15.2 GPa stress). Tribological performance in solution-based conditions demonstrated significantly lower wear compared to air, contrary to the widely-accepted synergy of wear and corrosion. After 400 scratches, wear depth in air reached 62 nm, but reduced to 12 nm in PBS and further decreased to 7 nm in BSA. Similarly, wear volume in air (0.047 μm³), was 8 times greater than in PBS (0.0061 μm³) and 23 times greater than in BSA (0.0018 μm³) (p < 0.0001). Likewise, tests in air produced a greater volume of wear debris (0.116 μm³) than PBS (0.0076 μm³) and BSA (0.0018 μm³). Introducing fluid and albumin may alter the mechanical and electrochemical environment of CoCrMo oxide films to reduce wear. Unidentified proteinaceous aggregates in BSA environment suggest that proteins lubricate the surfaces and/or interacts with wear debris or ions.

本研究利用原子力显微镜（AFM）纳米摩擦学技术研究了三种环境条件下环境对钴铬钼（CoCrMo）合金摩擦腐蚀行为的影响：(1)空气、(2)磷酸盐缓冲盐水（PBS）和(3)PBS中的牛血清白蛋白（BSA）。在137 ~ 170 μN （14.1 ~ 15.2 GPa应力）的法向力作用下，AFM金刚石尖（公称半径340 nm）产生了循环单线划痕（8 μm）。与广泛接受的磨损和腐蚀的协同作用相反，溶液条件下的摩擦学性能表明，与空气相比，溶液条件下的磨损明显更低。经过400次划痕后，空气中的磨损深度达到62 nm，但在PBS中减少到12 nm，在BSA中进一步减少到7 nm。同样，空气中的磨损量（0.047 μm3）是PBS （0.0061 μm3）的8倍，是BSA （0.0018 μm3）的23倍（p < 0.0001）。同样，在空气中测试产生的磨损碎片体积（0.116 μm3）大于PBS （0.0076 μm3）和BSA （0.0018 μm3）。引入流体和白蛋白可以改变CoCrMo氧化膜的力学和电化学环境，从而减少磨损。BSA环境中未知的蛋白质聚集体表明蛋白质润滑表面和/或与磨损碎片或离子相互作用。

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引用次数: 0

Anomalous tribology at high temperatures: How high-entropy alloys defy conventional wisdom in polycrystalline diamond compacts 高温下的异常摩擦学：高熵合金如何在多晶金刚石压片中挑战传统智慧

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-22 DOI: 10.1016/j.wear.2026.206548

Dongxu Hou , Dezhong Meng , Jiajie Kang , Zhiqiang Fu , Kuo Hu , Liang Xu , Wen Yue

High temperatures during downhole resource exploitation have significantly impact the drilling efficiency. Polycrystalline diamond compact (PDC) drill bits are widely used in deep drilling operations, facing the challenges of elevated downhole temperatures and highly abrasive formations. Considering the amorphization of diamond, conventional wisdom suggests that PDC, employed as cutting parts in diamond drill bits, exhibit reduced wear resistance at high temperatures. This study demonstrates that the HEA-containing PDC exhibits a temperature-dependent reduction in wear resistance, followed by a pronounced anomalous enhancement at 300 °C. The wear rate of the HEA-bonded PDC (1.5 × 10⁻¹⁰ mm³/N· mm) at 300 °C is only 62.5 % of that observed under ambient conditions. Meanwhile, its wear rate at high temperatures is only 60 % of that of cobalt-bonded PDC. Phase transformations within the HEA weakened its bonding strength with the diamond grains, leading to grain detachment during the wear process. Subsequently, HEA-containing wear debris accumulated at the wear interface, inducing a reconstruction phenomenon that protected the diamond grains. The wear mechanisms of counterparts were primarily abrasive wear, with a transition to fatigue wear at high temperatures and high frequencies. Moreover, the onset oxidation temperature of PDC containing HEA (910 °C) is significantly higher than that of PDC with cobalt (832 °C). This study will offer a novel pathway to design the anti-wear PDCs for elevated temperature conditions.

井下资源开采过程中的高温严重影响钻井效率。聚晶金刚石紧凑型（PDC）钻头广泛应用于深部钻井作业，面临着井下温度升高和高磨蚀性地层的挑战。考虑到金刚石的非晶化，传统观点认为PDC作为金刚石钻头的切削部件，在高温下的耐磨性降低。该研究表明，含hea的PDC在耐磨性方面表现出温度依赖性降低，随后在300°C时出现明显的异常增强。在300℃条件下，hea键合PDC （1.5 × 10−10 mm3/N·mm）的磨损率仅为环境条件下的62.5%。同时，其在高温下的磨损率仅为钴结合PDC的60%。HEA内部的相变削弱了其与金刚石晶粒的结合强度，导致磨损过程中晶粒脱落。随后，含hea的磨损碎屑在磨损界面积聚，形成保护金刚石颗粒的重建现象。合金的磨损机制以磨粒磨损为主，在高温高频条件下向疲劳磨损过渡。含HEA PDC的起氧化温度（910℃）明显高于含钴PDC的起氧化温度（832℃）。本研究将为高温条件下抗磨pdc的设计提供一条新的途径。

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引用次数: 0

Improving the tribological and anti-corrosion performance of LPBF-processed GH3230 superalloy by post-treatment 通过后处理提高lpbf加工的GH3230高温合金的摩擦学和防腐性能

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear

Pub Date : 2026-01-21 DOI: 10.1016/j.wear.2026.206560

Xiaohang Liu , Xueping Guo , Qilin Zhang , Shengbin Dai , Jiangqi Zhu , Bingwen Lu , Changri Xiong , Hao Qiu , Ting Yu , Xingchen Yan

The poor tribological performance and susceptibility to corrosion of as-printed nickel-based superalloys produced by laser powder bed fusion (LPBF) limit their application in demanding environments, such as the unlubricated, high-temperature components of aerospace engines. To address this challenge, this study aims to enhance the wear and corrosion resistance of LPBF-fabricated GH3230 superalloy through tailored post-processing. Specimens were subjected to solution treatment (ST) and hot isostatic pressing (HIP), and their microstructure, dry sliding wear behavior against a Si₃N₄ counter body, and electrochemical corrosion performance were systematically investigated. Results indicate that both ST and HIP promoted recrystallization and the formation of coarse carbides, completely transforming the initial molten pool structure. The HIP-treated alloy exhibited the lowest friction coefficient (0.69) and wear rate (3.23 × 10⁻⁵ mm³/(N·m)), which is attributed to the synergistic effect of coarse carbides and high-density dislocations that facilitated the formation of a work-hardened layer, thereby reducing the actual contact area. Furthermore, the HIP treatment enabled the formation of a more stable and protective passive film, resulting in superior corrosion resistance. This work demonstrates that HIP is an effective post-processing strategy for achieving a synergistic improvement in tribological and anti-corrosion properties, providing critical insights for the performance optimization of additively manufactured superalloys in severe service conditions.

激光粉末床熔合（LPBF）生产的镍基高温合金的摩擦学性能差，易腐蚀，限制了其在苛刻环境中的应用，如航空发动机的无润滑高温部件。为了解决这一挑战，本研究旨在通过定制后处理来提高lpbf制造的GH3230高温合金的耐磨损和耐腐蚀性能。对试样进行固溶处理（ST）和热等静压（HIP），系统地研究了试样的微观结构、对Si3N4反体的干滑动磨损行为和电化学腐蚀性能。结果表明：ST和HIP都促进了再结晶和粗碳化物的形成，完全改变了初始熔池结构；摩擦系数（0.69）和磨损率（3.23 × 10−5 mm3/(N·m)）最低，这是由于粗碳化物和高密度位错的协同作用，促进了加工硬化层的形成，从而减少了实际接触面积。此外，HIP处理能够形成更稳定和保护性的钝化膜，从而具有更好的耐腐蚀性。这项工作表明，HIP是一种有效的后处理策略，可以实现摩擦学和防腐性能的协同改进，为增材制造高温合金在恶劣使用条件下的性能优化提供关键见解。

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引用次数: 0