Surface & Coatings Technology最新文献

{"title":"Preparation of NiAlW coating by APS and HVOF spraying: Microstructure evolution, mechanical properties, and high-temperature tribological behavior","authors":"Zhiqiang Yang ,&nbsp;Daoxin Liu ,&nbsp;Kai Zhou ,&nbsp;Fei Gao ,&nbsp;Yanjie Liu ,&nbsp;Mengyao Li ,&nbsp;Junnan Wu ,&nbsp;Kaifa Fan ,&nbsp;Xiaohua Zhang","doi":"10.1016/j.surfcoat.2025.132164","DOIUrl":"10.1016/j.surfcoat.2025.132164","url":null,"abstract":"<div><div>The wear-resistant NiAlW coatings were prepared using atmospheric plasma spraying (APS) and high-velocity oxygen fuel (HVOF) techniques, respectively. The microstructure, mechanical properties, and tribological performance of the coatings were studied, and the wear mechanisms were explored. The results showed that the NiAlW coatings produced by both techniques are primarily composed of the NiAl phase, with the HVOF-prepared coating exhibiting higher density, hardness, and adhesive strength. In the wear test at 200 °C–800 °C, the friction coefficient (COF) and wear rate of APS-prepared coating (A-NiAlW) and HVOF-prepared coating (H-NiAlW) showed a trend of first increasing and then decreasing. At low temperature of 200 °C, A-NiAlW coating was mainly abrasive wear and oxidation wear, while H-NiAlW coating was mainly abrasive wear and adhesion wear. When the temperature rose to 400 °C, both coatings faced relatively serious adhesive wear, resulting in an increase in COF and wear rate. Under high-temperature conditions, the significant generation of self-lubricating phases such as NiAl₂O₄ and NiWO₄ provided good lubrication effects, effectively reducing wear and resulting in excellent tribological performance for both coatings at elevated temperatures.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132164"},"PeriodicalIF":5.3,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844004","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}

{"title":"Self-assembly of metal-ceramic nanocomposites within Cr-based coatings exhibiting superior oxidation resistance in high-temperature atmosphere","authors":"Xudong Jiang ,&nbsp;Zhihong Chen ,&nbsp;Yapei Zhang ,&nbsp;Zhendong Li ,&nbsp;Wei Wang ,&nbsp;Dayan Ma ,&nbsp;Junkai Deng","doi":"10.1016/j.surfcoat.2025.132177","DOIUrl":"10.1016/j.surfcoat.2025.132177","url":null,"abstract":"<div><div>The deposition of coatings is considered the most promising solution to improve the high-temperature oxidation resistance of the commercially used Zircaloy nuclear fuel cladding. However, in high-temperature conditions, although metallic coatings possess good adhesion to the cladding, their oxidation resistance is poor. On the contrary, ceramic coatings exhibit better oxidation resistance but lower structural stability. To effectively address these issues, in this work, a carbon-doped metallic multi-layered Cr/CrAl coating was designed to operate stably during routine working conditions. Unexpectedly, the developed coating can be self-assembled into metal-ceramic nanocomposite structures at elevated temperatures like a loss-of-coolant accident (LOCA). The self-assembled Cr₂AlC MAX phase and the Cr_xC ceramic nanoparticles within the transformed Cr₂Al coating lead to superior oxidation and corrosion resistance in high temperatures. An oxidized weight gain at 1200 °C steam oxidation experiments is only 18.5 % of that of the bare Zircaloy. Moreover, the coating displayed excellent density and good adhesion strength without any cracking effect near the interface between the coating and the substrate. In-depth first-principles calculations demonstrate that the superb oxidation resistance of the coating originated from the prevention of Al diffusion by the Cr₂Al intermetallic compounds and the Cr_xC ceramic nanoparticles. Our work provides valuable insights and paves the way for developing novel self-assembling coatings with excellent oxidation resistance required for accident-tolerant fuel cladding.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132177"},"PeriodicalIF":5.3,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143844006","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}

{"title":"Multi-layer structure improves wear and corrosion resistance of chromium","authors":"Xingwen Zhang ,&nbsp;Qingzhong Mao ,&nbsp;Zhifei Yu ,&nbsp;Shaojia Shi ,&nbsp;Zhan Liu ,&nbsp;Yonghao Zhao","doi":"10.1016/j.surfcoat.2025.132165","DOIUrl":"10.1016/j.surfcoat.2025.132165","url":null,"abstract":"<div><div>Electrodeposited hard chromium coatings have been proven to significantly improve the friction and wear properties of matrix metallic materials. Due to the presence of microcracks, there is an inverse relationship between the friction and corrosion properties of hard chromium coatings. In this work, we designed and successfully prepared chromium coatings with alternating soft and hard chromium by pulse and direct current processes. The experimental results show that the multilayer structure can significantly reduce the microcrack density of the surface hard chromium coating. The wear rate and corrosion potential of the multi-layer Cr coating with five layers are 3.48 × 10⁻⁵·mm³·N⁻¹·m⁻¹ and −524 mV, respectively. Compared with the single hard/soft chromium coating, the multilayer structure achieves a good synergy of wear resistance and corrosion performance. This is attributed to the multi-layer structure can effectively reduce the generation and propagation of microcracks. In the multi-layer structure, each layer can play a buffering role, reduce the brittleness of the overall coating, improve the wear resistance, and at the same time, in the multi-layer coating, more interfaces are formed, which prevent the further penetration of corrosive media to a certain extent.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132165"},"PeriodicalIF":5.3,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143837878","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}

{"title":"Investigation of the microstructure, mechanical properties and cutting performance of multi-layer Fe-based ultrafine-grained laser cladding layers","authors":"Zheng Gao,&nbsp;Guangchun Xiao,&nbsp;Hui Zhang,&nbsp;Hui Chen,&nbsp;Jingjie Zhang,&nbsp;Mingdong Yi,&nbsp;Zhaoqiang Chen,&nbsp;Chonghai Xu","doi":"10.1016/j.surfcoat.2025.132163","DOIUrl":"10.1016/j.surfcoat.2025.132163","url":null,"abstract":"<div><div>To enhance the performance of high-speed steel (HSS) cutting tools, 1–3 layers of in situ VC-reinforced Fe-based ultrafine-grained laser cladding layers were applied to their surfaces. The effect of the number of cladding layers on the macrostructure, phase composition, microstructure, mechanical properties, and cutting performance of the cladding layers were investigated. The results indicated that the single-layer cladding layers consisted of α-Fe, γ, VC, Cr₇C₃, Cr₂₃C₆, WC and Mo2C phases, while the two-layer and three-layer claddings exhibited the presence of the Fe₃C phase. As the number of cladding layers increased, the VC particles in the cladding layers transitioned from a petal-like to a dendritic morphology. The cladding layer grains became finer, with the average grain size of the three-layer cladding layer reaching 0.91 μm, corresponding to the submicron ultrafine-grained scale. The third layer exhibited the highest average microhardness of 1055 HV0.2. When the three-layer cladding layer was applied, the wear scar width, depth, and wear volume of the three-layer cladding layers reached their minimum values, measuring approximately 0.5 mm, 1.11 μm, and 0.184 × 107 μm³, respectively. Cutting experiments demonstrated that, compared with the M2 HSS tool, the main cutting force of the three-layer cladding layer tool was reduced by 8.6 %, while the cutting distance was increased by 73 %. The workpiece surface roughness reached a minimum of 2.5 Ra, and the tool wear mode was adhesive wear.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"507 ","pages":"Article 132163"},"PeriodicalIF":5.3,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143829145","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}

{"title":"Effect of sintering temperature on microstructure, phase evolution, thermo-mechanical properties of spark plasma sintering of NiTi alloy","authors":"Sneha Samal ,&nbsp;Mohit Chandra ,&nbsp;Wei Li ,&nbsp;Stanislav Habr ,&nbsp;Jaromír Kopeček ,&nbsp;Ivo Stachiv ,&nbsp;Petr Šittner","doi":"10.1016/j.surfcoat.2025.132152","DOIUrl":"10.1016/j.surfcoat.2025.132152","url":null,"abstract":"<div><div>This study examines the significant effects of sintering temperatures on the microstructure and the thermal, mechanical, and dynamic mechanical properties of NiTi alloys. The compaction of polycrystalline Ni50Ti50 (at.%) powders via spark plasma sintering (SPS) at various temperatures. The starting powder, with a particle size of 20 to 63 μm, was compacted at a fixed pressure of 50 MPa. Our findings indicate that the consolidated alloy exhibits stable phases of NiTi, such as austenite and martensite, at different sintering temperatures. Notably, both compactness and hardness improve as the sintering temperature increases. Higher temperatures lead to decreased porosity, resulting in a denser structure with a chemical composition of Ni_47.1Ti_52.9 (at.%). The grain size distribution also narrows with increased temperatures, highlighting microstructural evolution. Moreover, the samples displayed remarkable shape memory behavior and exceptional thermo-mechanical properties, achieving a maximum compactness of 99.8 % at 1150 °C. This research thoroughly investigates the influence of sintering temperature on microstructural characteristics, phase transformations, and shape memory behavior, underscoring the potential of NiTi alloys for various applications.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"507 ","pages":"Article 132152"},"PeriodicalIF":5.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835264","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}

{"title":"A comparative study of thermodynamic and high-temperature tribological properties of ZrCN coatings and Ti60 substrate using first-principles calculations and experimental methods","authors":"Mengjuan Yin ,&nbsp;Wenping Liang ,&nbsp;Qiang Miao ,&nbsp;Haiyang Yu ,&nbsp;Hongmei Jin","doi":"10.1016/j.surfcoat.2025.132160","DOIUrl":"10.1016/j.surfcoat.2025.132160","url":null,"abstract":"<div><div>To improve the mechanism and high temperature wear resistance of Ti60 substrate, ZrCN coating and Ti60 substrate were systematically studied by combining the first-principles calculation and double glow plasma surface alloying methods. The coating exhibited gradient changes in composition and structure. The hardness of the coating was determined to be approximately 17.4 GPa, about four times higher than that of the substrate. The interfacial adhesion strength of the coating reached 4.49 J/m², corresponding to its good crack propagation resistance (CPRs = 385). The coating significantly reduced wear rates at high temperatures compared to the substrate, with values of approximately 7.7 × 10⁻⁵ mm³ · N⁻¹ m⁻¹ at 500 °C, 3.3 × 10⁻⁵ mm³ · N⁻¹ m⁻¹ at 600 °C, and 7.5 × 10⁻⁵ mm³ · N⁻¹ m⁻¹ at 700 °C, respectively. These improvements were attributed to the coating's good mechanical and thermal stability, including strong bonding strength, a low thermal expansion coefficient, and low Gibbs free energy. In addition, the formation of a tribo-layer and interlayer nitrides, consisting of ZrO₂, Ti₂ZrO, (Zr, Ti)O₂, and TiN phases at high temperatures, further enhanced its superior performance.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132160"},"PeriodicalIF":5.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143837973","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}

{"title":"Protective Ti sub-oxide coatings on proton exchange water electrolysis prepared by HiPIMS technology","authors":"Y. Rodríguez-Martínez ,&nbsp;Santiago Domínguez-Meister ,&nbsp;D. Minudri ,&nbsp;T.C. Rojas ,&nbsp;A. Dianova-Pardo ,&nbsp;F.J. Fernández-Carretero ,&nbsp;Marta Brizuela","doi":"10.1016/j.surfcoat.2025.132155","DOIUrl":"10.1016/j.surfcoat.2025.132155","url":null,"abstract":"<div><div>Electrolysis, the process of splitting water into hydrogen and oxygen using electrical current, stands as a pivotal technology in the current hydrogen economy. Among various electrolyser technologies, proton exchange membrane water electrolysers (PEMWEs) are favored for their high efficiency, durability, and suitability for commercial applications. However, the cost of PEMWE systems, particularly the bipolar plates (BPs), which account for ∼25 % of system costs, remains a critical challenge. Stainless steel BPs has been explored as a cost-effective alternative to titanium BPs, but they require protective coatings to prevent corrosion under PEMWE conditions. This study focuses on developing titanium suboxide (Ti sub-oxide) coatings for stainless steel BPs to enhance corrosion resistance, maintaining a moderate contact resistance. Ti sub-oxide coatings were deposited using High-Power Impulse Magnetron Sputtering (HiPIMS), a technique enabling high-density and homogeneous material deposition. Key strategies to increase coating compactness, including substrate polarization and cyclic ion bombardment during deposition, were investigated. Morphological and compositional analyses were conducted, along with evaluations of corrosion resistance and electrical performance. The results demonstrate that Ti sub-oxide coatings developed with the selected approaches, exhibit improved compactness, which could potentially limit electrolyte infiltration, enhancing the durability and performance of stainless steel substrates. These findings highlight the promising behavior of Ti sub-oxide coatings under harsh PEMWE conditions. While further studies are needed in actual PEM electrolyzers, they suggest a cost-effective solution for advancing PEMWE technology and green hydrogen scalability toward Net Zero goals.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132155"},"PeriodicalIF":5.3,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143837821","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}

{"title":"Mechanism of surface hardness enhancement of aluminum alloy 2024-T3 by laser-induced plasma electrolyte jet machining","authors":"Mingxin Yu ,&nbsp;Ce Zhang ,&nbsp;Dong Li ,&nbsp;Fenglai Wang ,&nbsp;Pan Sun ,&nbsp;Jianfeng Cui ,&nbsp;Liqun Du","doi":"10.1016/j.surfcoat.2025.132141","DOIUrl":"10.1016/j.surfcoat.2025.132141","url":null,"abstract":"<div><div>Laser-induced plasma electrolyte jet machining (LIPEJM), as an efficient machining method with low machining deformation and no environmental pollution, has potential applications in the forming machining of aerospace thin-walled components. However, the change in surface hardness after LIPEJM remains unclear. This study utilized the nanoindentation technique to directly measure unmachined aluminum alloy 2024-T3 substrates, traditional electrolyte jet machining (EJM) and LIPEJM surfaces. The results showed that the hardness of the LIPEJM surface increased by 38.29 % compared to EJM, which was related to the laser-induced thermal and force effects. The laser-induced thermal effects, observed through an increase in the surface oxide layer at a laser energy density of 122.65 J/cm², contribute significantly to this enhancement. Additionally, a machining vibration monitoring device reveals the effects of laser-induced force during the machining process, providing insights into the underlying mechanisms. Grain refinement, induced by both thermal and mechanical impacts from the laser, is identified as the primary mechanism for surface hardness improvement. The laser-induced force exceeds the dendrite strength at high temperatures, resulting in fragmentation and increased equiaxial crystal formation sites. Furthermore, the laser-induced force effect temporarily elevates the melting point, increasing supercooling and promoting dynamic nucleation of non-uniform phases.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"507 ","pages":"Article 132141"},"PeriodicalIF":5.3,"publicationDate":"2025-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823734","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}

{"title":"Development of barrier coatings based on diamond-like carbon for hydrogen storage and transportation","authors":"Mikel Garitano ,&nbsp;Lucia Mendizabal ,&nbsp;Oihane Hernandez-Rodriguez ,&nbsp;Eduardo Tabares ,&nbsp;Fernando J. López ,&nbsp;Pedro Luis Arias ,&nbsp;Mikel Oregui ,&nbsp;Eva G-Berasategui","doi":"10.1016/j.surfcoat.2025.132122","DOIUrl":"10.1016/j.surfcoat.2025.132122","url":null,"abstract":"<div><div>The currently employed materials in hydrogen storage and transportation are steels with limited mechanical and hydrogen embrittlement resistance. Therefore, effective and durable barrier coatings capable of withstanding high-pressure hydrogen charging are required to mitigate hydrogen permeation, protect the pipe or tank material and thus enhance its overall performance. In this regard, hydrogenated amorphous Diamond-Like Carbon (a-C:H) coatings with adhesion-promoting Cr and WC interlayers were designed in this work by means of Physical Vapor Deposition (PVD) and Plasma-Enhanced Chemical Vapor Deposition (PECVD) technologies. Films with different thicknesses (<span><math><mrow><mo>≈</mo><mn>500</mn><mspace></mspace><mtext>nm</mtext></mrow></math></span>, <span><math><mrow><mo>≈</mo><mn>1000</mn><mspace></mspace><mtext>nm</mtext></mrow></math></span> and <span><math><mrow><mo>≈</mo><mn>2500</mn><mspace></mspace><mtext>nm</mtext></mrow></math></span>) and hydrogen contents (around <span><math><mrow><mn>20</mn><mspace></mspace><mtext>%</mtext></mrow></math></span> and <span><math><mrow><mn>30</mn><mspace></mspace><mtext>%</mtext></mrow></math></span>) were produced so as to assess the effect of both variables on their barrier performance. The coatings were subsequently applied to AISI 4130 low-alloyed carbon steel substrates. Afterwards, their evaluation as hydrogen barriers was carried out by means of a Devanathan–Stachurski electrochemical permeation setup, a liquid-phase technique that accurately measures hydrogen permeation and diffusion. All coatings demonstrated effectiveness as hydrogen barriers. Thickness proved to be critical to ensure repeatable outcomes, while more hydrogenated films exhibited higher diffusivity. In fact, the thickest coatings (<span><math><mrow><mo>≈</mo><mn>2500</mn><mspace></mspace><mtext>nm</mtext></mrow></math></span>) with the lowest hydrogen content (around <span><math><mrow><mn>20</mn><mspace></mspace><mtext>%</mtext></mrow></math></span>) outperformed the others, reducing hydrogen diffusion by a factor of 22, and permeation by a factor of 179. Considering the results, DLC coatings will likely pave the way for the development of a new generation of facilities for mass transportation and storage of hydrogen.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"508 ","pages":"Article 132122"},"PeriodicalIF":5.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843894","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}

{"title":"Effect of pulse frequency on the microstructure and corrosion behavior of Ti-6Al-4V alloy fabricated by pulse arc remelting method","authors":"Rui Xiang ,&nbsp;Jiankang Huang ,&nbsp;Xiaoquan Yu ,&nbsp;Xinyue Wang ,&nbsp;Yuhang Xie ,&nbsp;Tianxiang Zhao ,&nbsp;Huayu Zhao ,&nbsp;Shurong Yu ,&nbsp;Ding Fan","doi":"10.1016/j.surfcoat.2025.132159","DOIUrl":"10.1016/j.surfcoat.2025.132159","url":null,"abstract":"<div><div>This study employed the gas tungsten arc welding (GTAW) pulse arc remelting method to modify the surface of Ti-6Al-4V alloy, investigating the influence of pulse frequency on its microstructural evolution and corrosion behavior in a 3.5 wt% NaCl solution. The results indicate that the prior β grains gradually refine as the pulse frequency increases, and the width and spacing of α/α′ martensite decrease. Compared to the sample remelted at 25 Hz, the grain size of the sample remelted at 500 Hz decreased by 80.91 %, while the lath spacing and thickness reduced by 56.7 % and 27.9 %, respectively. The maximum surface microhardness of the remelted Ti-6Al-4V alloy reached 524 Hv. The alloy exhibited the best corrosion resistance at a pulse frequency of 100 Hz. However, when the pulse frequency exceeded 100 Hz, the excessively high grain boundary density intensified localized corrosion at the grain boundaries. The width of the α/α′ martensite phase is a key factor affecting the corrosion resistance of the Ti-6Al-4V alloy.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"507 ","pages":"Article 132159"},"PeriodicalIF":5.3,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143835313","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}