IF 5.3 1区工程技术

Wear Pub Date : 2024-10-10 DOI: 10.1016/j.wear.2024.205591

{"title":"Effect of current on the tribological behavior of Cu-Fe-P immiscible alloy produced by laser powder bed fusion","authors":"","doi":"10.1016/j.wear.2024.205591","DOIUrl":"10.1016/j.wear.2024.205591","url":null,"abstract":"<div><div>Cu-based immiscible alloys have significant potential application value in the field of electrical contacts. This study investigated the tribological behavior of Cu-Fe-P immiscible alloys produced via laser powder bed fusion (LPBF) under current-carrying conditions. The alloys consist of softer ε-Cu phase and harder Fe-rich phases. The Fe-rich phase acts as a protective reinforcement during current-carrying friction and wear tests, improving the wear resistance of the alloy. With the increasing current, the coefficient of friction initially rose and then decreased, whereas the wear rate showed a gradual increase. At low currents (0, 2, 3 and 5 A), mechanical wear predominantly governs the wear mechanism. As the current increases, the mechanical wear gradually transitions from adhesive wear to abrasive wear, accompanied by weak oxidative wear. At higher currents (7 A and 10 A), the wear mechanism is dominated by arc erosion wear and oxidative wear. Notably, when the current exceeded 2 A, an oxide film consisting of CuO, Fe<sub>2</sub>O<sub>3</sub>, and Fe<sub>3</sub>O<sub>4</sub> formed, enhancing the frictional properties of the alloy. Once the current surpassed 5 A, the arc discharge occurred at high currents, forming molten phases and arc erosion pits on the worn surface of the Cu-Fe-P immiscible alloy.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142434387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of rail hardness on transverse profile evolution and computed contact conditions in a full-scale wheel-rail test rig evaluation 全尺寸轮轨试验台评估中，轨道硬度对横向轮廓演变和计算接触条件的影响

IF 5.3 1区工程技术

Wear Pub Date : 2024-10-09 DOI: 10.1016/j.wear.2024.205589

引用次数: 0

Evaluation of lubrication mechanism of hybrid nanolubricants in turning hardened AISI D6 tool steel 评估混合纳米润滑剂在车削淬硬 AISI D6 工具钢中的润滑机理

IF 5.3 1区工程技术

Wear Pub Date : 2024-10-05 DOI: 10.1016/j.wear.2024.205583

{"title":"Evaluation of lubrication mechanism of hybrid nanolubricants in turning hardened AISI D6 tool steel","authors":"","doi":"10.1016/j.wear.2024.205583","DOIUrl":"10.1016/j.wear.2024.205583","url":null,"abstract":"<div><div>Turning of hardened tool steels has posed a significant challenge for machining professionals. Usually, hardened tool steels are machined under dry with ceramic or PCBN inserts. However, dry machining imposes a condition where high cutting temperatures are developed, which becomes prohibitive when the part's geometric and dimensional accuracy is required. On the other hand, using mineral oil-based cutting fluid has encountered increasing restrictions because of its unsustainable nature. In this context, developing new sustainable lubri-cooling techniques, such as using vegetable oils blended with nanoparticles, could be an appropriate alternative. Thus, the main objective of this study was to investigate the performance of three different vegetable oil-based nanolubricants blended with three different nanoparticles (CuO, a-C:H, and CuO + a-C:H), applied under MQL when machining a quenched and tempered AISI D6 tool steel. For this purpose, facing turning trials were performed using solid PCBN inserts with the following cutting parameters: V<sub>c</sub> = 100 m/min, a<sub>p</sub> = 0.3 mm, and f = 0.1 mm/rev. For comparison, facing turning tests were performed under dry and pure vegetable oil (without nanoparticles) and applied under MQL. Output variables included average surface roughness (R<sub>a</sub>), flank wear (VB<sub>C</sub>), wear mechanisms of the cutting edge, chip shape, and chip compression ratio (R<sub>c</sub>). The results showed that the vegetable oil-based nanolubricants applied under MQL improved the tribological conditions in the chip-tool and workpiece-tool interfaces, mainly in the case of CuO + a-C:H nanolubricant. In this case, it enhanced the lubricating action of the vegetable oil, decreasing cutting tool wear probably because of the combination of rolling mechanism, - provided by the CuO nanoparticles, and the formation of a protective film, supplied by the a-C:H nanoparticles.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Insights into vibration-induced softening effect: A thermodynamic approach 对振动诱导软化效应的见解：热力学方法

IF 5.3 1区工程技术

Wear Pub Date : 2024-10-04 DOI: 10.1016/j.wear.2024.205588

{"title":"Insights into vibration-induced softening effect: A thermodynamic approach","authors":"","doi":"10.1016/j.wear.2024.205588","DOIUrl":"10.1016/j.wear.2024.205588","url":null,"abstract":"<div><div>This work investigates the wear behavior of nickel-based alloy during ultrasonic vibration-assisted machining (UVAM) by combining molecular dynamics simulation and thermodynamic theory. The research reveals that the tangential force exhibits periodic variations during UVAM, with a period half of the vibration period. Tangential force and total resistance decrease due to the synergistic effect of vibration-induced softening and thermal softening. A deeper understanding of the total resistance variation during the UVAM process can be achieved by the dimensionless resistance coefficient, which is difficult for the traditional friction coefficient (CoF). The Bejan number elucidates the contributions of the thermal softening and vibration-induced softening effects in the wear process. The findings highlight that the vibration-induced softening effect dominates when adjusting the amplitude for the active control of friction. In contrast, when the frequency is modulated, the contributions of vibration-induced softening and thermal softening effects are nearly equivalent. Furthermore, the wear mode transitions with increasing vibration frequency, characterized by the Strouhal number (<em>Sr</em><sub><em>w</em></sub>). The vibration wear mode attains dominance when <em>Sr</em><sub><em>w</em></sub> > 1.88. This work provides essential theoretical guidance to gain insight into the wear behavior in UVAM to optimize the machining performance.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of hydrogen on the fretting wear behavior of laser cladded FeCoCrNiMo0.2 high entropy alloy coating 氢对激光熔覆 FeCoCrNiMo0.2 高熵合金涂层摩擦磨损行为的影响

IF 5.3 1区工程技术

Wear Pub Date : 2024-10-02 DOI: 10.1016/j.wear.2024.205587

{"title":"Effects of hydrogen on the fretting wear behavior of laser cladded FeCoCrNiMo0.2 high entropy alloy coating","authors":"","doi":"10.1016/j.wear.2024.205587","DOIUrl":"10.1016/j.wear.2024.205587","url":null,"abstract":"<div><div>This study investigates laser-cladded high entropy alloy (HEA) coatings on high-speed train axles to enhance wear resistance under specific fretting conditions. Axles in humid and acidic environments absorb hydrogen, leading to accumulation in grain boundaries, which weakens their structure and causes damage under alternating stress. Despite this, the impact of hydrogen damage on the fretting wear behavior of HEA coatings has not been explored. To address this, we performed fretting wear tests on a laser-cladded FeCoCrNiMo<sub>0.2</sub> coating and a GCr15 steel ball friction system, evaluating their performance before and after hydrogen exposure. The results of the study indicate that under a constant load of F<sub>n</sub> = 10N and a displacement amplitude of D = 50 μm, the friction coefficient, maximum wear depth, wear volume, and wear rate increased when the system was in the hydrogen charging state compared to the non-hydrogen charging state. Specifically, the friction coefficient increased from 0.60 to 0.93, the maximum wear depth increased from 2.82 μm to 3.63 μm, the wear volume increased from 14.106 × 10<sup>4</sup>μm<sup>3</sup> to 22.098 × 10<sup>4</sup>μm<sup>3</sup>, and the wear rate increased from 28.213 × 10<sup>−6</sup> mm/Nm to 36.600 × 10<sup>−6</sup> mm/Nm. Under the hydrogen charging state, the friction coefficient, maximum wear depth, wear volume, and wear rate all increased. This is due to hydrogen damage, including the formation of pitting pits and cracks on the surface of the coating, stress concentration, and brittle failure caused by hydrogen infiltration into the material. The presence of hydrogen makes the surface of the coating more prone to detachment, resulting in finer wear debris, deeper grooves, and increased oxidation. These factors accelerate the wear of the coating. This finding will contribute to the development and improvement of advanced surface modification techniques for materials in the hydrogen environment.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142445556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wear properties of a new Al80Mg10Si5Cu5 multicomponent alloy 新型 Al80Mg10Si5Cu5 多组分合金的磨损特性

IF 5.3 1区工程技术

Wear Pub Date : 2024-09-30 DOI: 10.1016/j.wear.2024.205585

{"title":"Wear properties of a new Al80Mg10Si5Cu5 multicomponent alloy","authors":"","doi":"10.1016/j.wear.2024.205585","DOIUrl":"10.1016/j.wear.2024.205585","url":null,"abstract":"<div><div>The present study investigates the tribological properties of a newly developed multicomponent aluminium weight-light multicomponent alloy for wear based on the Al80Mg10Si5Cu5 system for lightweight automotive applications, especially back drum discs. The samples were manufactured by High-Pressure Die Casting (HPDC) employing cast alloy returns and secondary aluminium ingots and were tested at room temperature (RT) and 200 °C. It has been observed that the Al80Mg10Si5Cu5 alloy offers a higher hardness and wear resistance at RT and especially at 200 °C compared with the AlSi9Cu3 reference alloy (x10 times reduction in wear rate). The impact of maintaining the external surface layer (skin) of HPDC cast parts has been studied for the ball-on disc test, showing improved tribological properties and the possibility of avoiding the machining of contact surfaces. The as-cast Al80Mg10Si5Cu alloy with the surface layer showed a wear rate coefficient of 5 × 10<sup>−4</sup> mm<sup>3</sup>/N.m<sup>2</sup> at RT, a 50 % lower than that of the sample without skin. Solution heat-treated samples (72 h at 440 °C, water quenching at 75 °C, and natural aging) with the surface layer showed a wear rate coefficient of 11 × 10<sup>−4</sup> mm<sup>3</sup>/N.m<sup>2</sup>, approximately 20 % lower than the sample without a surface layer. The wear rate of AlSi9Cu3 alloy decreased by more than 50 % in the samples without skin at RT. At 200 °C, wear rate coefficients were lower in the samples with the surface layer.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dependence of high temperature tribological performance of MoS2-based composites on type of oxides 基于 MoS2 的复合材料的高温摩擦学性能与氧化物类型的关系

IF 5.3 1区工程技术

Wear Pub Date : 2024-09-30 DOI: 10.1016/j.wear.2024.205586

{"title":"Dependence of high temperature tribological performance of MoS2-based composites on type of oxides","authors":"","doi":"10.1016/j.wear.2024.205586","DOIUrl":"10.1016/j.wear.2024.205586","url":null,"abstract":"<div><div>As a solid lubricating material with excellent anti-friction and anti-wear performance, MoS<sub>2</sub> is prone to oxidation in high temperature and atmospheric environment, which leads to the deterioration of lubricating performance and the decrease of service life. The addition of nano-particle oxides can improve the high-temperature lubricating performance of MoS<sub>2</sub>-based solid lubricating materials to some extent, but the effects of different nanoparticles oxides under the same test condition is still unclear. The effects of nano-particles oxides (TiO<sub>2</sub>, Cr<sub>2</sub>O<sub>3</sub>, Al<sub>2</sub>O<sub>3</sub> and ZrO<sub>2</sub>) on the tribological performance of MoS<sub>2</sub>-based composites at 450 °C were compared. It was shown that MoS<sub>2</sub>-TiO<sub>2</sub> exhibited the best high temperature tribological properties, and its average friction coefficient was about 0.26, which was about 26 % and 10 % lower than that of 718 substrate and MoS<sub>2</sub>, respectively. Here we attempted to propose a new concept of correlative potential to explain the lubricating difference of binary oxides under high temperature. The good tribological performance of MoS<sub>2</sub>-TiO<sub>2</sub> at high temperature was attributed to the low correlative potential of TiO<sub>2</sub> nanoparticles and the dense tribo-oxide layer formed at the friction interface that reduce the shearing of the rubbing interface. The research results can provide reference for the selection and design of MoS<sub>2</sub>-based composites, and also enrich the theory of high temperature tribology.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tribo-oxidation mechanism of gradient nanostructured Inconel 625 alloy during high-temperature wear 梯度纳米结构 Inconel 625 合金在高温磨损过程中的三氧化机制

IF 5.3 1区工程技术

Wear Pub Date : 2024-09-29 DOI: 10.1016/j.wear.2024.205581

{"title":"Tribo-oxidation mechanism of gradient nanostructured Inconel 625 alloy during high-temperature wear","authors":"","doi":"10.1016/j.wear.2024.205581","DOIUrl":"10.1016/j.wear.2024.205581","url":null,"abstract":"<div><div>The tribo-oxidation layer is typically formed at the contact interface of high temperature wear, which exhibits a significant effect on the friction behavior of gradient nanostructured (GNS) materials. This study systematically investigated the wear resistance, near-surface microstructure, and compositional changes of ultra-thick GNS Inconel 625 alloy subjected to surface mechanical rolling treatment (SMRT) under high-temperature sliding wear conditions. The experimental results indicated that as the temperature increased to 500 °C, a tribo-oxidation layer was formed on the surface of the GNS sample, thereby resulting in an abnormal increase in the coefficient of friction (COF) and a rapid decrease in the wear rate. The gradient nanostructures facilitated oxidation diffusion channels, promoting the formation of a protective Cr<sub>2</sub>O<sub>3</sub> film and spinel oxides, reducing the wear rate. At lower temperatures, a rapidly formed Cr<sub>2</sub>O<sub>3</sub> film shielded the matrix, forming a tribo-oxidation layer composed of Cr<sub>2</sub>O<sub>3</sub> and nickel. At 800 °C, the tribo-oxidation layer exhibited complex structures, including glaze, spinel oxide, Cr<sub>2</sub>O<sub>3</sub>, and Cr<sub>2</sub>O<sub>3</sub>/Ni mixed layers. This complexity was attributable to the oxidation diffusion rate of the gradient nanostructures and tribo-oxide layers. The findings not only elucidated the tribo-oxidation mechanism of GNS nickel-based superalloys but also offered valuable insights for designing wear-resistant materials.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grinding of C/SiC ceramic matrix composites: Influence of grinding parameters on tool wear C/SiC 陶瓷基复合材料的磨削：磨削参数对刀具磨损的影响

IF 5.3 1区工程技术

Wear Pub Date : 2024-09-27 DOI: 10.1016/j.wear.2024.205582

{"title":"Grinding of C/SiC ceramic matrix composites: Influence of grinding parameters on tool wear","authors":"","doi":"10.1016/j.wear.2024.205582","DOIUrl":"10.1016/j.wear.2024.205582","url":null,"abstract":"<div><div>C/SiC Ceramic Matrix Composites (CMCs) have been identified as a key material for improving high-speed braking systems and aerospace components as they offer low density, and high specific strength at high temperatures. Grinding is often used for the machining stage due to the high hardness, heterogeneity, and brittle nature of CMSs. Previous studies have explored the effect of grinding parameters, but most of them do not indicate whether they have used the same grinding wheel for all tests. In fact, there is limited understanding of how wear impacts process performance over the grinding wheel's lifespan. In this work, the effect of grinding wheel wear on cutting forces is addressed and grinding wheel topography is analyzed with the objective of identifying a parameter that allows to quantify grinding wheel wear in a non-destructive way. Results have shown that, after a short conditioning stage, cutting forces increase approximately linearly with the machined length. For the machining conditions analyzed, normal forces increase 200 % in the first machined meter (first stage), then rise 17 % per meter thereafter (second stage). Tangential forces rise 300 % in first meter and then climb 27 % per meter subsequently. In this second stage, force ratio approaches a constant value and the generation of flat surfaces on the diamond grains is the dominating wear mechanism. Under such conditions, 3D surface roughness parameters Sa, Sq, Spk and Sku have been proven to be useful for monitoring wheel wear.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142424958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synergetic enhancement of wear resistance of polyimide coatings through the integration of MoS2 nanoflowers and MXene nanosheets 通过整合 MoS2 纳米花和 MXene 纳米片协同增强聚酰亚胺涂层的耐磨性

IF 5.3 1区工程技术

Wear Pub Date : 2024-09-26 DOI: 10.1016/j.wear.2024.205584

{"title":"Synergetic enhancement of wear resistance of polyimide coatings through the integration of MoS2 nanoflowers and MXene nanosheets","authors":"","doi":"10.1016/j.wear.2024.205584","DOIUrl":"10.1016/j.wear.2024.205584","url":null,"abstract":"<div><div>Composite nano-lubricating fillers have attracted much attention due to their excellent synergistic effect. In this study, MoS<sub>2</sub> nanoflowers composed of two-dimensional nanosheets were synthesized by precise control of hydrothermal conditions. Using the \"bridging\" effect of dopamine, the flower-like MoS<sub>2</sub> was assembled with MXene to form a unique compound filler. This distinctive structure perfectly retained the shape of the MoS<sub>2</sub> flower. The impacts of compound fillers on the thermodynamic, mechanistic, and frictional properties of polyimide (PI) coatings were scrutinized. The formation of the compound fillers between MXene and MoS<sub>2</sub> effectively improve the interface compatibility of individual materials in the PI matrix. The compound fillers can enhance the thermodynamic stability and mechanical properties of PI. It is noteworthy that the frictional coefficient of the PI/(MoS<sub>2</sub>:MXene = 4:6) compound coating decreased by 47.2 %, and the attrition rate reduced by 98.5 % compared to the pure PI coating. The compound lubricating filler prepared by the combination of two types of two-dimensional lubrication fillers has an important application prospect in the field of wear resistance of polymer materials.</div></div>","PeriodicalId":23970,"journal":{"name":"Wear","volume":null,"pages":null},"PeriodicalIF":5.3,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

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