Journal of Materials Research and Technology-Jmr&t最新文献

{"title":"Influence of hydrostatic pressure on the passive film of titanium alloy","authors":"Wentao Li ,&nbsp;Yiwei Guo ,&nbsp;Wei Liu ,&nbsp;Yinghua Yang ,&nbsp;Yunan Zhang ,&nbsp;Feifei Huang ,&nbsp;Lei Wen ,&nbsp;Dongbai Sun","doi":"10.1016/j.jmrt.2025.06.065","DOIUrl":"10.1016/j.jmrt.2025.06.065","url":null,"abstract":"<div><div>The effect of hydrostatic pressure on the corrosion behavior and failure mechanism of Ti–6Al–4V in simulated deep-sea environments has been investigated through microstructure analysis and in-situ electrochemical measurements. Hydrostatic pressure does not change the nucleation mechanism of passive film of Ti–6Al–4V. Charge transfer resistance (<em>R</em>_ct) decreases by 53.0 % and 69.9 % at 10 MPa and 30 MPa respectively, compared to 0.1 MPa, suggesting that the corrosion resistance of passive film degrades with increasing hydrostatic pressure. Oxygen vacancies act as the primary donors within the passive film of Ti–6Al–4V. At the etching depth of 10 nm, the TiO₂ content in the passive film decreases from 47.75 % (0.1 MPa) to 33.23 % (30 MPa). The average valence state of Ti in the inner layer of the passive film decreases with the increase in hydrostatic pressure, indicating that the stability of the passive film decreases.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1186-1198"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297440","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":"Ti3C2Tx MXene/MoS2 hybrid reinforcement of epoxy coating for synergistic improvement of thermo-mechanical, abrasion and UV-shielding performance","authors":"Elham Soroush ,&nbsp;Parsa Afsahi ,&nbsp;Nafise Taheri ,&nbsp;Hadis Hashemi ,&nbsp;Bahram Ramezanzadeh","doi":"10.1016/j.jmrt.2025.06.054","DOIUrl":"10.1016/j.jmrt.2025.06.054","url":null,"abstract":"<div><div>Epoxy resin exhibits exceptional stiffness and adhesion, making it essential as a matrix for protective coatings and composites. However, their inherent brittleness, low fracture toughness, and susceptibility to thermal/UV degradation limit their performance in demanding applications. To overcome these challenges, nanofillers are incorporated into epoxy matrices to enhance their properties. In this study, 2D/2D heterostructure Ti₃C₂T_x MXene/MoS₂ (MX/MS) hybrid nanofillers were added into epoxy coatings to synergistically enhance the thermomechanical, abrasion, and UV-shielding performance of epoxy. The hybrid nanofiller was synthesized hydrothermally and characterized by Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and field emission scanning electron microscopy (FESEM) analyses. The incorporation of 0.5 wt% of hybrid nanofiller into epoxy coatings significantly improved thermal stability, increasing char residue from 14 % (neat epoxy) to 27 %. Mechanical properties enhancements included an increase in tensile strength by 3.5 times, 112 % higher hardness (146.6→311.4 MPa), and 45 % greater storage modulus (1354→1958 MPa). Concurrently, the coating exhibited exceptional durability, reducing abrasion wear rate by 58 % (6.5→2.7 μg/cycle) and UV color change (ΔE) by 62 % (11.86→4.53) after 200 h of accelerated weathering. This work pioneers MXene/MoS₂ hybrids as multifunctional reinforcements that uniquely converge thermal, mechanical, and protective enhancements in epoxy coatings.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 983-996"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271921","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 on the fatigue behavior of different extreme high-speed laser cladding materials on the damaged EA4T axle","authors":"Ruipeng Han ,&nbsp;Hansong Zhang ,&nbsp;Jin Liu ,&nbsp;Shuyan Li ,&nbsp;Lei Xu ,&nbsp;Minnan Zhang ,&nbsp;Junwen Zhao ,&nbsp;Hui Chen","doi":"10.1016/j.jmrt.2025.06.056","DOIUrl":"10.1016/j.jmrt.2025.06.056","url":null,"abstract":"<div><div>Surface damage to railway axles intensifies with increasing axle loads and operating speeds. This study evaluates extreme high-speed laser cladding (EHLA) for repairing damaged EA4T axles using five Fe-based alloys (24CrNiMo, AISI 4340, H13, Fe314, and 316L) spanning high-, medium-, and low-alloy categories. The microstructural characteristics, phase compositions, residual stresses, hardness, and elastic modulus of the cladding layers were systematically investigated. Fatigue tests revealed that all repaired specimens exhibited reduced strength compared to smooth ones (370 MPa), primarily due to: (1) epitaxial growth forming stress-aligned coarse columnar austenitic grains, and (2) solidification defects. Among them, high-alloy claddings (316L, Fe314) retained 92–96 % fatigue strength (337–359 MPa) through their stable austenitic structure and effective stress transfer to the substrate. In contrast, medium/low-alloy claddings showed reduced strength retention (60–81 %) from stress concentration due to grain boundary weakening and elastic modulus mismatch (246–253 vs 223 GPa). These findings establish three essential criteria for laser-clad repair axle material selection: (i) austenitic phase stability to prevent deleterious phase transformations, (ii) fine equiaxed grain structure to limit columnar grain growth, and (iii) elastic modulus compatibility with the substrate to ensure optimal stress distribution.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 629-645"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255012","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":"Study on friction and wear of 9Cr18 steel with composite treatment of laser shock processing and surface texturing","authors":"Xiuyu Chen ,&nbsp;Yalong Li ,&nbsp;Weipeng Rao ,&nbsp;Yuru Lin ,&nbsp;Junying Chen ,&nbsp;Qingshan Jiang ,&nbsp;Zhilong Xu ,&nbsp;Bicheng Guo ,&nbsp;Jiashun Gao ,&nbsp;Shu Huang","doi":"10.1016/j.jmrt.2025.06.039","DOIUrl":"10.1016/j.jmrt.2025.06.039","url":null,"abstract":"<div><div>The composite treatment of laser shock processing (LSP) and laser-induced surface texturing was employed to enhance the tribological performance of 9Cr18 steel. LSP was conducted with energies of 5–7J, while surface texturing was achieved by controlling laser parameters to produce micro-pits with depths ranging from 9.9 to 32.5 μm and surface densities of 21–37 %. The results demonstrated that LSP significantly improved surface hardness to 820HV_0.1 at 7J, induced −876 MPa residual compressive stresses, and refined grain size by 10.20 %, as revealed by EBSD analysis. The synergistic effect of LSP-6J and surface texturing reduced the friction coefficient by 57 % and wear loss by over 90 % under boundary lubrication, with optimal performance observed at a texture depth of 18.0 μm and surface density of 37 %. Under dry friction, the composite treatment achieved a 57 % reduction in friction coefficient and over 90 % reduction in wear loss, with the best results at a texture depth of 14.6 μm and surface density of 37 %. The wear mechanism transitioned from abrasive and adhesive wear to slight abrasive wear, attributed to the combined effects of surface hardening, lubricant retention, and debris trapping by textures.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1119-1133"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280228","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":"Microstructural evolution, strength-ductility synergy, and corrosion behavior of the UNS N08825 Ni-based superalloy/UNS S32750 super duplex stainless steel friction stir welds","authors":"Jalal Kangazian ,&nbsp;Morteza Shamanian ,&nbsp;Hyoung Seop Kim","doi":"10.1016/j.jmrt.2025.06.064","DOIUrl":"10.1016/j.jmrt.2025.06.064","url":null,"abstract":"<div><div>Fusion welding of Ni-based superalloys (NBSs) and duplex stainless steels is challenging due to the difficulty of achieving optimal performance, primarily caused by the formation of an unbalanced phase ratio and detrimental phases in the weld. This research elucidates the microstructural evolution in various regions of the friction stir weldment (FSW) of UNS N08825 NBS and UNS S32750 super duplex stainless steel (SDSS) through an electron backscatter diffraction study. Additionally, the tensile behavior, strengthening mechanisms, and corrosion properties were examined. The results reveal that the activation of distinct recrystallization mechanisms in the stir zones (SZs) led to the formation of fine-grained austenite in the NBS SZ and ultrafine-grained austenite and ferrite in the SDSS SZ. Alternating layers of NBS and SDSS were also observed within the weld zone. This heterostructure in the weld zone led to an enhancement in the work hardening, strength, and particularly elongation (54 %) compared to the SDSS (29 %) and NBS (43 %) base metals. The primary strengthening mechanism was identified as solid solution strengthening on the SDSS side (497 MPa) and grain boundary strengthening on the NBS side (190–266 MPa) and in the weld zone (262 MPa). Moreover, the weld zone exhibited superior oxide film resistance and enhanced pitting corrosion resistance relative to the NBS base metal. Overall, this research demonstrates that FSW is an effective technique for maintaining the phase balance in the SDSS SZ while minimizing the formation of detrimental phases and improving the microstructure and properties of the weldment compared to the base metals.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 583-600"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253350","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 detailed investigation of induced residual stresses in the laser powder bed fusion process using the modified inherent strain approach and experimental measurements","authors":"Marjan Molavi-Zarandi ,&nbsp;Ali Bonakdar ,&nbsp;Hossein Mohammadtaheri ,&nbsp;Mehran Bagheri ,&nbsp;Ramin Sedaghati","doi":"10.1016/j.jmrt.2025.06.062","DOIUrl":"10.1016/j.jmrt.2025.06.062","url":null,"abstract":"<div><div>In this work, a multiscale finite element model is proposed to simulate the Laser Powder Bed Fusion (LPBF) process, employing the Modified Inherent Strain (MIS) methodology. MIS is a more sophisticated approach than the conventional Inherent Strain (IS) technique, initially developed for welding process simulations. Due to the complex thermo-mechanical interactions present in the metal Additive Manufacturing (AM) process, the MIS approach has evolved to account for these interactions, in which sequentially deposited layers act as mechanical constraints on earlier layers, influencing stress and strain evolution throughout the process. A multiscale modeling approach can effectively predict the residual stresses induced during LPBF, which are essential for assessing the quality and performance of the manufactured part. This study provides a novel contribution by systematically validating MIS-based residual stress predictions against depth-resolved X-Ray Diffraction (XRD) measurements up to 3 mm below the surface, addressing a critical gap in the literature where prior works primarily focused on surface-level stress or distortion. Laser power and scanning speed, which are critical process parameters, were modified to investigate their individual impacts on the residual stress distribution in the longitudinal and transverse directions. Simulated results were validated through experimental XRD measurements on fabricated Inconel 625 test coupons. While the MIS method aligns well with the experimental data at the surface level, discrepancies arise in deeper subsurface layers, where simulations tend to underestimate tensile residual stresses due to simplified MIS assumptions. Refinement, such as improved thermo-mechanical coupling and adaptive heat source models, may enhance stress prediction accuracy in the LPBF process. By offering a comprehensive depth-resolved analysis, this work provides new insights into subsurface stress evolution, critical for ensuring the structural integrity of LPBF parts. The study provides a critical assessment of the MIS method's capabilities and offers essential guidance for future research opportunities to improve residual stress predictions in LPBF-produced parts.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 1257-1275"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144297446","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":"Characterization of Ti–48Al–2Cr–2Nb fabricated by directed energy deposition","authors":"Kazuhiro Mizuta ,&nbsp;Wataru Oishi ,&nbsp;Kenzo Sakata ,&nbsp;Kazuhiro Gokan ,&nbsp;Koji Kakehi","doi":"10.1016/j.jmrt.2025.06.050","DOIUrl":"10.1016/j.jmrt.2025.06.050","url":null,"abstract":"<div><div>The additive manufacturing process known as directed energy deposition (DED) is an effective method for repairing parts in aerospace and other industries. In this study, a DED system equipped with a heating component and an inert gas shield system to mitigate the effects of cracks and oxidation was applied for the deposition of Ti–48Al–2Cr–2Nb (at.%), a gamma titanium aluminide used in turbine blades for commercial engines. The microstructure obtained from the proposed DED process was dominated by the γ phase (area ratio of 99.38 %) with a small grain size (mean diameter of 7.4 μm) as a result of massive transformation. A γ/γ lamellar structure was also identified. Massive transformation was induced because the DED met certain conditions, such as a high cooling rate, high Al content (above 49 at.%), and a fine microstructure attributed to the powders. The microstructure obtained by DED contributed to excellent mechanical properties, including a tensile strength of 471 MPa at 750 °C and a creep life of 357 h at 750 °C/200 MPa, which are even superior to those of conventional HIPed TiAl casting materials. The EBSD and TEM analyses suggested that the hybrid microstructure consisting of lamellae separated by high-angle grain boundaries with random orientation and lamellae separated by low-angle grain boundaries within a γ grain, combined with fine γ/γ lamellar spacing of 253 nm, would act as a barrier to dislocation shear. This microstructure is distinct from the widely observed α₂/γ lamellar grain with semi-coherent boundaries that follow the Blackburn orientation relationship. Finally, our experiments indicate that powder DED, when well managed with heating and an inert gas system, is a potential method for repairing parts.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 750-759"},"PeriodicalIF":6.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264013","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 new approach to numerical modeling of material fracture in cross wedge rolled parts","authors":"Zbigniew Pater","doi":"10.1016/j.jmrt.2025.06.047","DOIUrl":"10.1016/j.jmrt.2025.06.047","url":null,"abstract":"<div><div>This study deals with the problem of modeling material fracture in the axial zone of a workpiece in cross wedge rolling (CWR) processes. A new approach to this problem is proposed, according to which improved accuracy of modeling can be ensured by precise determination of the critical value of material damage. It is shown that in CWR processes the critical damage value strongly depends on the forming temperature <em>T</em> and the applied reduction ratio <em>δ</em>. Experimental results are used to develop formulas for calculating the critical damage value of C45 steel, for different values of <em>T</em> (ranging from 900 °C to 1200 °C) and <em>δ</em> (ranging from 1.1 to 2.0). The study is conducted using three different criteria of ductile fracture (normalized Cockcroft-Latham, Pater et al., and Oyane et al.) and the Simufact.Forming software. The validation results show that the proposed material fracture prediction method determines accurately the location and size of axial cracks that can occur in CWR-produced parts.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 687-699"},"PeriodicalIF":6.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253302","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":"Melt-based additive manufacturing of refractory metals and alloys: Experiments and modeling","authors":"Mohammad Younes Araghi ,&nbsp;Ali Dashti ,&nbsp;Mahshad Fani ,&nbsp;Iman Ghamarian ,&nbsp;Cesar Ruiz ,&nbsp;Shuozhi Xu","doi":"10.1016/j.jmrt.2025.05.207","DOIUrl":"10.1016/j.jmrt.2025.05.207","url":null,"abstract":"<div><div>Refractory metals and alloys possess unique properties, such as high melting points and excellent mechanical stability at elevated temperatures, making them attractive for aerospace, nuclear, and other demanding industries. However, fabrication of these materials using traditional manufacturing techniques is challenging due to their high melting points and intrinsic brittleness. Additive manufacturing (AM) techniques provide an approach to mitigate some of these challenges, but systematic insights into their process parameters, microstructure control, and mechanical performance remain fragmented in the literature. This paper provides an overview of the challenges and future prospects associated with melt-based AM of refractory metals and alloys from the perspectives of experiments, physics-based models, and data-driven approaches. Our review concludes by summarizing the frontiers in the field and highlighting the future developments necessary to enable efficient AM fabrication of refractory metals and alloys.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 870-892"},"PeriodicalIF":6.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264029","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":"Microstructure and properties of CeO2 and WC synergistically enhanced laser cladding Ni60 coatings","authors":"Lili Cao ,&nbsp;Yu Qian ,&nbsp;Yibo Shao ,&nbsp;Yanjie Ren ,&nbsp;Yongfeng Li ,&nbsp;Hongzhi Cui ,&nbsp;Yunpeng Li ,&nbsp;Yunze Wu","doi":"10.1016/j.jmrt.2025.06.023","DOIUrl":"10.1016/j.jmrt.2025.06.023","url":null,"abstract":"<div><div>This study investigates the effects of different CeO₂ contents (0.5 wt.%, 1.0 wt.%, 1.5 wt.% and 2.0 wt.%) on the microstructure and properties of 50 wt.%WC-Ni60 coatings to enhance performance, extend the service life of laser cladding coatings on 45 steel. The synergistic mechanisms by which CeO₂ and WC improve the microstructure and properties of the coatings are systematically explored. Microstructural characterization, phase analysis, microhardness testing, wear resistance evaluation, and corrosion resistance assessment were conducted using scanning electron microscopy (SEM), X-ray diffraction (XRD), and electrochemical methods. The results demonstrate that CeO₂ addition significantly refines the grain structure of WC-Ni60 coatings, leading to notable improvements in microhardness, wear resistance, and corrosion resistance. The optimal performance is achieved at a CeO₂ content of 1.0 wt.%: compared with 50 wt.% WC-Ni60 coating, the microhardness increases by 9.3 %, the wear rate decreases by 88.4 %, and the corrosion resistance is significantly enhanced. These improvements are attributed to CeO₂-induced grain refinement, homogeneous distribution of hard phases.</div></div>","PeriodicalId":54332,"journal":{"name":"Journal of Materials Research and Technology-Jmr&t","volume":"37 ","pages":"Pages 646-658"},"PeriodicalIF":6.2,"publicationDate":"2025-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144253352","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}