Intermetallics最新文献_第9页

Microstructure evolution, work-hardening-dynamic softening transition and wear performance of a NiAl-based high-entropy alloy nial基高熵合金的组织演变、加工硬化-动态软化转变及磨损性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-20 DOI: 10.1016/j.intermet.2025.108930

Zhixin Xu, Xiaohong Wang, Ao Li, Yunting Su, Tengfei Ma

{"title":"Microstructure evolution, work-hardening-dynamic softening transition and wear performance of a NiAl-based high-entropy alloy","authors":"Zhixin Xu, Xiaohong Wang, Ao Li, Yunting Su, Tengfei Ma","doi":"10.1016/j.intermet.2025.108930","DOIUrl":"10.1016/j.intermet.2025.108930","url":null,"abstract":"<div><div>This study fabricated a NiAl-CoCrxZryFez high-entropy alloy (HEA) with a valence electron concentration (VEC) value of 7 via vacuum arc melting. The influence of Zr content on the alloy's microstructure, mechanical properties, and wear performance was systematically investigated. Microstructural analysis revealed that increasing Zr progressively enhanced the volume fraction of eutectic microstructure, while the phase composition evolved from a single BCC phase to a dual-phase FCC + BCC structure. The Ni30Al28Co15Zr7Fe20 alloy exhibited exceptional resistance to high-temperature softening, achieving yield strengths of 1316 MPa at 600 °C, 960 MPa at 800 °C, and 300 MPa at 1000 °C. However, thermal stability assessments indicated that eutectic secondary phases in both Ni30Al28Co15Cr5Zr5Fe17 and Ni30Al28Co15Zr7Fe20 alloys became unstable at 1000 °C, exhibiting a tendency for phase ablation. Furthermore, Zr addition broadened the temperature window for the transition from work-hardening to dynamic softening during deformation by approximately 200 °C. High-temperature tribological tests (600–800 °C) revealed a transition in the dominant wear mechanisms from abrasive to adhesive wear with increasing temperature. The Ni30Al28Co15Zr7Fe20 alloy exhibited superior wear resistance at 800 °C, achieving the lowest wear rate of 8.92 × 10−6 (mm3/N·m). This enhancement is attributed to Zr-induced solid solution strengthening, which improved hardness and effectively mitigated delamination wear mechanisms, thereby maintaining excellent high-temperature wear resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108930"},"PeriodicalIF":4.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665819","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure, mechanical properties, and corrosion resistance of biomedical Ti-Zn alloys prepared by spark plasma sintering 火花等离子烧结生物医用Ti-Zn合金的显微组织、力学性能和耐蚀性

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-20 DOI: 10.1016/j.intermet.2025.108926

Y.T. Chen , J.L. Xu , J. Huang , J.M. Luo , L. Lian , Y.F. Zheng

{"title":"Microstructure, mechanical properties, and corrosion resistance of biomedical Ti-Zn alloys prepared by spark plasma sintering","authors":"Y.T. Chen , J.L. Xu , J. Huang , J.M. Luo , L. Lian , Y.F. Zheng","doi":"10.1016/j.intermet.2025.108926","DOIUrl":"10.1016/j.intermet.2025.108926","url":null,"abstract":"<div><div>Dense Ti-Zn alloys with high strength and low elastic modulus were prepared by spark plasma sintering (SPS) for biomedical applications. The effect of Zn contents (5–20 wt%) on the microstructure, mechanical properties, wear resistance, and corrosion resistance of the Ti-Zn alloys were systematically investigated. The results show that the Ti-Zn alloys are mainly composed of α-Ti and Ti2Zn phases with small amounts of β-Ti phase, and the quantity and size of the Ti2Zn phase increase with increasing the Zn contents. The Ti2Zn and α-Ti forms typical pearlite structures. Solid solution strengthening of Zn and the second phase strengthening of the Ti2Zn result in a significant increase in mechanical strength, microhardness, and wear resistance of the Ti-Zn alloys. The Ti-Zn alloys exhibit peak values for both yield strength and microhardness when the Zn content is 15 wt%. Meanwhile, as the Zn content rises, the compressive strength progressively increases, whereas the fracture strain gradually diminishes. The fracture mechanism changes from the tough-brittle mixed fracture to the quasi-cleavage fracture and then to the cleavage fracture. The compressive elastic modulus of the Ti-Zn alloys ranges from 20 to 30 GPa, very close to that of the human bone. The wear resistance of the Ti-Zn alloys steadily enhances as the Zn content increases, and the wear mechanism changes from abrasive wear to adhesive wear and oxidative wear. Specifically, the wear rate of the Ti-20Zn shows an 86.7 % enhancement compared to pure titanium. The Ti-Zn alloys demonstrate a strong passivation capability in SBF solution, exhibiting outstanding corrosion resistance, while the increase of the Zn content has a certain negative effect on the corrosion resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108926"},"PeriodicalIF":4.3,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 selective laser melting process parameters on the fatigue strength and material characteristics of tungsten carbide/inconel 718 composites 选择性激光熔化工艺参数对碳化钨/铬镍铁合金718复合材料疲劳强度和材料特性的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-19 DOI: 10.1016/j.intermet.2025.108928

Haichuan Shi , Yang Chu , Peilei Zhang , Zhishui Yu , Hua Yan , Qinghua Lu

{"title":"Effects of selective laser melting process parameters on the fatigue strength and material characteristics of tungsten carbide/inconel 718 composites","authors":"Haichuan Shi , Yang Chu , Peilei Zhang , Zhishui Yu , Hua Yan , Qinghua Lu","doi":"10.1016/j.intermet.2025.108928","DOIUrl":"10.1016/j.intermet.2025.108928","url":null,"abstract":"<div><div>Tungsten Carbide (WC)-reinforced Inconel 718 (IN718) composites were prepared by Selective Laser Melting (SLM) technique. The impact of SLM production on WC/IN718 composites was studied to analyze densities, microstructure evolution, tensile properties, and fatigue properties under various process parameters. The effect of parameters on composite densities and powder melting was analyzed by a combination of experimental and simulation methods. In the matrix, the WC particles are dispersed uniformly, and there is a reaction between the WC particles and the matrix to form a good interfacial reaction layer. As the laser energy density increases, the surface of the WC particles melts under high energy density laser irradiation, leading to the diffusion of decomposed W and C atoms into the matrix. Two typical carbides, W2C and (M, W)C (M for Ni, Cr, Nb, Fe), form sequentially at a distance from the WC grains. At a laser energy density of 89.94 J/mm3, the tensile strength and microhardness of the composites reach the maximum values of 1203 MPa and 403 HV. This is a composite strengthening mechanism resulting from the WC and carbide strengthening phases. The incorporation of WC particles significantly improves the fatigue resistance of the composites compared to IN718. Fatigue fracture is in the form of quasi-dissociation fracture, with fatigue originating from pores and incompletely fused defects on the surface. The fatigue extension zone is characterized by riverine and fatigue streaks. This study offers a theoretical foundation and guidance on enhancing the mechanical properties of nickel-based superalloys and broadening their potential applications in the future.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108928"},"PeriodicalIF":4.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144665798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Microstructure and mechanical properties of a novel lightweight eutectic high-entropy alloy 一种新型轻质共晶高熵合金的组织与力学性能

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-19 DOI: 10.1016/j.intermet.2025.108925

Dongdong Xia , Xicong Ye , Jiankun Yang , Huijun Kang , Li Sun , Guoxin Wu , Jiajia Guo , Yiren Rong , Fanghui Zhu

引用次数: 0

Effect of sintering temperature and late PCA addition on the microstructure and mechanical behavior of a heterogeneous-multiscale AlCoCuMnNi high-entropy alloy synthesized via mechanical alloying and spark plasma sintering 烧结温度和后期PCA添加对机械合金化和火花等离子烧结制备的非均质多尺度AlCoCuMnNi高熵合金的组织和力学行为的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-19 DOI: 10.1016/j.intermet.2025.108920

Soroosh Mohammadi , Farshad Akhlaghi , Jae-Hyung Cho

{"title":"Effect of sintering temperature and late PCA addition on the microstructure and mechanical behavior of a heterogeneous-multiscale AlCoCuMnNi high-entropy alloy synthesized via mechanical alloying and spark plasma sintering","authors":"Soroosh Mohammadi , Farshad Akhlaghi , Jae-Hyung Cho","doi":"10.1016/j.intermet.2025.108920","DOIUrl":"10.1016/j.intermet.2025.108920","url":null,"abstract":"<div><div>With high-entropy alloys (HEAs) surpassing traditional alloys in nearly every characterization aspect, the search for novel high-potential compositions has become increasingly important. AlCoCuMnNi is a newly designed HEA, developed based on literature review, theoretical calculations, and the mutual interactions of its constituent elements in similar HEAs. This alloy is processed using mechanical alloying and spark plasma sintering (SPS) to produce an ultra-fine-grained, heterogeneous microstructure. To optimize the processing route, samples with different powder stock conditions subjected to various sintering temperatures (900, 1000 and 1100 °C) and examined. The results demonstrated a significant influence of input parameters on the final microstructure and mechanical properties. Modifying powder morphology through late PCA addition or increasing sintering temperature led to a substantial rise in hardness (from 390 to 625 HV), while a moderate sintering temperature yielded an unprecedented balance between shear strength of 300 MPa and high hardness as 440 HV. The obtained mechanical properties were further justified using advanced characterization techniques, such as EBSD analysis. The microstructure of the processed alloys revealed a heterogeneous bimodal duplex FCC + BCC phase, contributing to varying mechanical responses within the same composition. This study not only introduces a new HEA with an optimal balance between hardness and shear strength but also highlights its adaptability. The alloy's ability to be tailored through different processing routes makes it a promising candidate for further optimization and potential applications in various industrial sectors.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108920"},"PeriodicalIF":4.3,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144662191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fcc TiFeCoNi-based medium and high-entropy alloys: corrosion and antibacterial behavior Fcc tifeconi基中高熵合金：腐蚀和抗菌行为

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-18 DOI: 10.1016/j.intermet.2025.108906

Farid Gharibi Asl, Milad Gashti, Rouhollah Mehdinavaz Aghdam, Ali Nourozi, Reza Soltani, Fatemehsadat Pishbin

{"title":"Fcc TiFeCoNi-based medium and high-entropy alloys: corrosion and antibacterial behavior","authors":"Farid Gharibi Asl, Milad Gashti, Rouhollah Mehdinavaz Aghdam, Ali Nourozi, Reza Soltani, Fatemehsadat Pishbin","doi":"10.1016/j.intermet.2025.108906","DOIUrl":"10.1016/j.intermet.2025.108906","url":null,"abstract":"<div><div>A quasi-equiatomic Ti25Fe25Co25Ni25 medium entropy alloy (MEA) and a Ti20Fe20Co20Ni20Cu20 high entropy alloy (HEA) were synthesized via mechanical alloying (MA) and spark plasma sintering (SPS). During the MA process, a single-phase FCC solid solution was detected. Following the SPS method, a dual-phasic structure consisting of FCC and Ti-rich intermetallic (C14-Laves) compounds was formed. An investigation was conducted to examine the role of Cu on the microstructural, corrosion, and antibacterial features of the TiFeCoNi alloy. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests were employed for electrochemical investigation. The study revealed that the corrosion current density for MEA and HEA samples was documented as 4.30 × 10−6 A/cm2 and 5.88 × 10−6 A/cm2, respectively. The MEA sample exhibited a reduction of ∼16 % in capacitor double layer capacity and a rise of ∼216 % in charge transfer resistance, indicating its superior corrosion resistance compared to the HEA sample. Both samples experienced a combination of galvanic and pitting corrosion mechanisms. The antibacterial efficacy against S. aureus and E. coli demonstrated that the HEA sample exhibits superior antibacterial characteristics compared to the MEA sample, attributed to the release of Cu2+ ions. The inhibition zone diameters for the HEA sample against E. coli and S. aureus were measured to be 7.46 mm and 14.60 mm, respectively. In contrast, no inhibition zone was observed for the MEA sample against either bacterial strain.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108906"},"PeriodicalIF":4.3,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657212","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","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 Al2O3 on the microstructure and mechanical properties of the lightweight refractory medium entropy alloy coatings Al2O3对轻质耐火介质熵合金涂层组织和力学性能的影响

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-17 DOI: 10.1016/j.intermet.2025.108918

C.Y. Cui, L. Feng, X.F. Liu, H.H. Xu, J. Yang, X.G. Cui

{"title":"Effects of Al2O3 on the microstructure and mechanical properties of the lightweight refractory medium entropy alloy coatings","authors":"C.Y. Cui, L. Feng, X.F. Liu, H.H. Xu, J. Yang, X.G. Cui","doi":"10.1016/j.intermet.2025.108918","DOIUrl":"10.1016/j.intermet.2025.108918","url":null,"abstract":"<div><div>Ti1.5NbMo0.5(Al2O3)x (x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0) lightweight refractory medium entropy alloy (RMEA) coatings were fabricated on 316 L stainless steel substrates using prefabricated powder laser cladding. The microstructure of the coatings primarily consisted of BCC and Laves phases. Al2O3-free coating showed high microhardness (1137.5 HV), 5.7 times that of the substrate, but exhibited increased brittleness. Adding Al2O3 refined the grains, promoted interdendritic phase formation, and improved toughness and molding quality. After annealing at 900 °C, the microhardness of the Ti1.5NbMo0.5(Al2O3)0.6 coating showed only a 2.07 % reduction, indicating superior high-temperature stability. The wear resistance of the coatings improved significantly, with the lowest friction coefficient observed in the Ti1.5NbMo0.5(Al2O3)0.6 coating (0.491) before annealing, and a further reduction of 33.71 % after annealing. The wear mechanism was attributed to the formation of oxide layers, reducing direct contact between the friction pair and the coating.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108918"},"PeriodicalIF":4.3,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144657213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

FeCr-based bulk metallic glasses with enhanced wear and corrosion resistance 具有增强耐磨性和耐腐蚀性的铁铁基大块金属玻璃

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-15 DOI: 10.1016/j.intermet.2025.108909

Jiawei Zhang , Chen Su , Limin Cai , Ya-nan Chen , Yifan Ruan , Shengfeng Guo

{"title":"FeCr-based bulk metallic glasses with enhanced wear and corrosion resistance","authors":"Jiawei Zhang , Chen Su , Limin Cai , Ya-nan Chen , Yifan Ruan , Shengfeng Guo","doi":"10.1016/j.intermet.2025.108909","DOIUrl":"10.1016/j.intermet.2025.108909","url":null,"abstract":"<div><div>Seawater contains a high concentration of Cl− ions, and prolonged exposure can lead to severe corrosion and wear of ship hulls, thereby increasing maintenance and operational costs. In this work, we developed a series of FeCr-based bulk metallic glasses with Cr content exceeding 30 at.%. Notably, when the Cr content reaches 30 at.%, the alloy exhibits excellent comprehensive performance, including a high glass transition temperature of 904 K and a hardness of 1429 HV. These enhancements are attributed to the increased contents of Cr-C and Cr-B bonds. Among the compositions studied, the Fe37Cr30W10C13.5B7.5Y2 alloy exhibits superior wear resistance, with a wear rate as low as 6.33 × 10−6 mm3 N−1 m−1. However, further increasing the Cr content to 37 at.% results in a higher wear rate of 9.17 × 10−6 mm3 N−1 m−1. This might be due to the reduction in indentation toughness, which increases the brittleness and promotes fatigue wear. Moreover, the Fe37Cr30W10C13.5B7.5Y2 alloy shows good corrosion resistance in a 3.5 wt% NaCl solution, with a low self-corrosion current density of 2.25 × 10−6 A/cm2. Nevertheless, excessive Cr content destabilizes the passivation layer, leading to premature pitting corrosion. This degradation arises from a sharp decrease in the Cr3+/Cr6+ ratio during passivation and an increase in cation vacancies, which together reduce the corrosion resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108909"},"PeriodicalIF":4.3,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144633584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-situ formation and regulation of Ti2AlC particles with low aspect ratio and their influence mechanisms on microstructure and mechanical properties in Ti-46Al-8Nb-1.5Cr-xC alloy Ti-46Al-8Nb-1.5Cr-xC合金低长径比Ti2AlC颗粒的原位形成与调控及其对显微组织和力学性能的影响机制

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-14 DOI: 10.1016/j.intermet.2025.108917

Hongze Fang , Liao Mi , Jiangshan Liang , Xin Ding , Xianfei Ding , Bobo Li , Ruirun Chen

{"title":"In-situ formation and regulation of Ti2AlC particles with low aspect ratio and their influence mechanisms on microstructure and mechanical properties in Ti-46Al-8Nb-1.5Cr-xC alloy","authors":"Hongze Fang , Liao Mi , Jiangshan Liang , Xin Ding , Xianfei Ding , Bobo Li , Ruirun Chen","doi":"10.1016/j.intermet.2025.108917","DOIUrl":"10.1016/j.intermet.2025.108917","url":null,"abstract":"<div><div>To obtain a high volume fraction of Ti2AlC particles with a low aspect ratio and to elucidate their formation mechanism, Ti-46Al-8Nb-1.5Cr-xC alloys were fabricated using vacuum arc melting. A systematic investigation was conducted on the lamellar colony size, Ti2AlC particle content and morphology evolution, phase constituents, and mechanical properties, along with a discussion of the corresponding mechanisms. The results show that as the carbon content increases from 0.5 to 3.0 at.%, the B2 phase gradually decreases and eventually disappears, while the average lamellar colony size is refined from 97 to 39 μm. Simultaneously, the morphology of Ti2AlC particles changes from initially elongated shapes to equiaxed shapes forms, with the aspect ratio decreasing from 9.33 to 3.28. The proportion of low-aspect-ratio Ti2AlC particles increases from 4.1 to 77.8 %. The formed Ti2AlC particles not only act as heterogeneous nucleation sites for the β phase but also impede the growth of the α phase, thereby providing the basis for lamellar colony refinement. The increased number of TiC particles, combined with the reduced surface energy difference between the (0001) basal plane and other crystallographic planes, jointly inhibited the growth of Ti2AlC particles. In terms of mechanical properties, the compressive strength increases from 1491 to 2299 MPa, and the strain improves from 17.66 to 34.48 %. The enhancement in strength is mainly attributed to lamellar colony refinement and precipitation strengthening by Ti2AlC particles. Moreover, the reduction of the B2 phase and the crack-arresting effect of Ti2AlC particles contribute to the improved toughness of the alloy.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108917"},"PeriodicalIF":4.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of alumina reinforcement effects on microstructure, hardness, and tribological behavior of AlCoCrFeNi high entropy alloy 氧化铝增强对AlCoCrFeNi高熵合金显微组织、硬度和摩擦学性能影响的研究

IF 4.3 2区材料科学

Intermetallics Pub Date : 2025-07-14 DOI: 10.1016/j.intermet.2025.108915

M. Ghanbariha , M. Ketabchi , M. Farvizi

{"title":"Investigation of alumina reinforcement effects on microstructure, hardness, and tribological behavior of AlCoCrFeNi high entropy alloy","authors":"M. Ghanbariha , M. Ketabchi , M. Farvizi","doi":"10.1016/j.intermet.2025.108915","DOIUrl":"10.1016/j.intermet.2025.108915","url":null,"abstract":"<div><div>This study examines the effect of alumina (Al2O3) reinforcement on the microstructure, hardness, and wear behavior of AlCoCrFeNi high-entropy alloy (HEA). Al2O3 particles (0–15 wt%) were incorporated into the HEA matrix using mechanical alloying (MA) and the prepared powder mixtures were consolidated by spark plasma sintering (SPS) method. The microstructural examination showed that the base alloy displayed a dual-phase structure comprising BCC and FCC phases, with alumina addition stabilizing the BCC phase at higher concentrations (15 wt%). Microhardness tests indicated that the incorporation of up to 10 wt% Al2O3 had minimal impact on hardness, whereas 15 wt% Al2O3 significantly increased it from approximately 600 HV to 999 HV. Tribological investigations demonstrated that the wear resistance improved with increasing alumina content and HEA-15 wt% Al2O3 composite exhibited the lowest wear width (1892 μm) and the best wear performance. The primary wear mechanisms consisted of abrasion, delamination, adhesion, and oxidation. These findings highlight the potential of alumina-reinforced HEAs for applications requiring enhanced mechanical strength and wear resistance.</div></div>","PeriodicalId":331,"journal":{"name":"Intermetallics","volume":"185 ","pages":"Article 108915"},"PeriodicalIF":4.3,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0