Journal of Materials Science & Technology最新文献

{"title":"Thermal aging behavior of an as-rolled Fe-17Cr-12Ni-2.6Mo-1.6Mn-0.044C (in wt.%) austenitic stainless steel","authors":"Xiangbo Xu, Daokui Xu, Shenghu Chen, Shuo Wang, En-Hou Han","doi":"10.1016/j.jmst.2025.06.001","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.001","url":null,"abstract":"The thermal aging behavior of an as-rolled 316-type austenitic stainless steel (Fe-17Cr-12Ni-2.6Mo-1.6Mn-0.044C (in wt.%)) was investigated under conditions of 550°C/0–10000 h, 600°C/0–1000 h and 650°C/0–60 h. It demonstrated that the degree of sensitization (<em>R</em>_a) of thermal-aged samples due to the precipitation of <em>M</em>₂₃C₆ particles at grain boundaries can be measured and quantified by using the double loop electrochemical potentiokinetic reactivation (DLEPR) method. At 550, 600 and 650°C, the determined <em>R</em>_a values increased with thermal aging time in a fourth-order polynomial relationship. Based on the condition of equal <em>R</em>_a values at 550, 600 and 650°C, the equivalent acceleration equation between thermal aging temperatures and times was established for predicting the degree of thermal damage of austenitic stainless steels during the long-time service at elevated temperatures. Moreover, since the formation of <em>M</em>₂₃C₆ precipitates led to the severe Cr depletion at GBs and the degradation of passive film, the charge transfer resistance (<em>R</em>_ct) values of the 550°C/9000 h, 600°C/1000 h and 650°C/60 h thermal-aged samples were decreased to 20% that of the as-received sample.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"9 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ionically conductive NiFe2O4/CNTs organohydrogel composite for boosting efficient electromagnetic wave absorption","authors":"Yuelin Lv, Hui Zhao, Jieyun Zhang, Tong Gao, Qiang Zhuang, Jie Kong, Lixin Chen","doi":"10.1016/j.jmst.2025.05.064","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.064","url":null,"abstract":"Gel-based electromagnetic wave (EMW) absorbing materials demonstrate substantial potential in wearable electronics and soft robotics. However, it remains challenging to simultaneously achieve superior impedance matching and efficient electromagnetic energy dissipation through benefiting potential synergies among multifunctional attributes. In this work, a novel salting-out organohydrogel containing 0.5 wt.% NiFe₂O₄/CNTs was successfully synthesized, with a three-dimensional (3D) porous cross-linked structure and multiple heterointerfaces, which dramatically boosts the interfacial effects and improves the polarization loss. Meanwhile, dense polymer networks impose steric hindrance that elevates the energy barrier for molecular reorientation and ionic transport resistance, synergistically amplifying both polarization and ohmic conductive losses. Taking advantage of the features of considerable multiple polarization loss and optimized impedance matching, the as-prepared S-0.5 NiFe₂O₄/CNTs organohydrogel has achieved exceptional EMW absorption performance (the minimum reflection loss RL = −48.31 dB and the maximum adequate absorption bandwidth EAB reaches 6.16 GHz). This as-prepared organohydrogel exhibits optimal radar cross-section (RCS) reduction performance with a maximum value of 21.63 dB m². Such excellent electromagnetic characteristics deepen the mechanistic understanding of internal attenuation processes in gel-based EMW absorbers and provide novel design principles for advancing next-generation flexible electronics.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"9 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578266","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"All-printed VIA-free polyimide-based multilayer flexible circuits","authors":"Mingwei Zhou, Zhenghao Li, Zelin Wang, Xiangtao Li, Rui Wang, Hongke Li, Houchao Zhang, Wenzheng Sun, Tianwen Wang, Xing Liu, Hongbo Lan, Xiaoyang Zhu","doi":"10.1016/j.jmst.2025.04.089","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.089","url":null,"abstract":"Polyimide (PI)-based multilayer flexible circuits are widely used in aerospace, flexible displays, and new energy sources due to their high space utilization, excellent optoelectronic properties, and high-temperature resistance. However, current fabrication methods face challenges including process complexity, high costs, and stress concentration in the vertical interconnect access (VIA) structure, significantly limiting frequent design iterations and personalized customization of multilayer flexible circuits. Here, we present an all-printed fabrication method for VIA-free PI-based multilayer flexible circuits. The process utilizes direct ink writing to print the substrate layer, the middle dielectric layer with hole structures, and the encapsulation layer for filling the hole structures. Electric-field-driven printing is employed to produce high-precision wires, which can achieve continuous deposition at the locations of the dielectric layer and hole structures. These wires can cross-connect with wires in other layers at the hole structures. Since the high-precision wires at the crosspoints are in the same plane, this approach achieves nearly VIA-free electrical interconnection, significantly reducing stress concentration. Finally, the encapsulation layer fills the hole structures, further enhancing the overall mechanical properties. The method achieves low-cost, integrated rapid prototyping of multilayer flexible circuits to meet customization requirements. Furthermore, application cases involving multilayer infrared display devices provide compelling evidence that PI-based multilayer flexible circuits possess stable interlayer electrical interconnect, excellent mechanical stability, and high-temperature resistance. The all-printed fabrication method provides a novel solution for the microscale and simple preparation of PI-based multilayer flexible circuits.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"40 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermal behaviour and fluid dynamics during pulsed-wave laser powder bed fusion of 18Ni-300 maraging steel","authors":"Jun Song, Bo Song, Michael Ryan, Rossitza Setchi, Yusheng Shi","doi":"10.1016/j.jmst.2025.05.063","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.063","url":null,"abstract":"Laser powder bed fusion (LPBF) enables the fabrication of metallic components with complex geometries directly from raw powders. The process typically employs continuous- or pulsed-wave lasers, which significantly impact the thermal-fluid dynamics and subsequently affect the microstructure. However, the behaviour during pulsed-wave LPBF remains inadequately understood. This study developed a high-fidelity multi-physics modelling framework to simulate the evolution of point-by-point laser exposure during pulsed-wave LPBF. The effects of laser power and exposure time on thermal-fluid behaviour in single-/multi-track and multi-layer pulsed-wave LPBF were investigated and validated against experiments. The results reveal that variations in either laser power or exposure time can result in similar molten pool morphology during a single exposure, though their dynamic behaviours exhibited marked differences. Increased laser power augmented the drilling rate of the molten pool, while exposure time exhibited a minimal effect on the depth growth rate, thereby enhancing the predictability of its behaviour. Additionally, the critical molten pool depth at which the drilling rate changes remained nearly constant, irrespective of laser power or exposure time. During point-by-point scanning of a single melt track, gaps formed between exposures due to mismatches in laser power, exposure time and point distance, resulting in track discontinuities. In subsequent scanning, deep gaps arose from poor bonding within intra-tracks and insufficient melting between inter-tracks and inter-layers. Keyhole pores primarily formed during the laser-off period of the pulse cycle at high laser powers or exposure times, as surface tension and gravity drove molten material forward, but solidification pinned the keyhole tip, leading to defects. These findings significantly advance the understanding of melt pool dynamics and defect formation in pulsed-wave LPBF.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"265 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiscale synergistic design of SiCf/SiBCN-based metamaterial for high-performance electromagnetic wave absorption in a wide temperature domain","authors":"Bo Huang, Yuchen Cao, Fang Ye, Jie Liang, Chen Li, Xiaomeng Fan","doi":"10.1016/j.jmst.2025.04.088","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.04.088","url":null,"abstract":"Electromagnetic wave (EMW) absorption materials effectively synergize room temperature (RT) and high-temperature absorption are essential for harsh environments applications such as stealth aircraft and aerodynamically heated components of aero-engines. Herein, an ingenious multiscale design strategy is proposed by combining the SiC_f/SiBCN composite with metastructure to achieve synergy RT and high-temperature absorption. Firstly, as the skeleton material, the microstructure, electromagnetic parameters, and high-temperature EMW absorption performance of the SiC_f/SiBCN composite have been systematically investigated. After optimizing the metastructure and corresponding geometric parameters, the SiC_f/SiBCN composite with a frustum pyramid structure has exhibited exceptional broadband and temperature-insensitive absorption characteristics. The effective absorption bandwidth (EAB) of optimized SiC_f/SiBCN-based metamaterial reaches 34.8 GHz (5.2–40 GHz, covering 96.7% within the tested frequency band) at RT, while the EAB remains 12.5 GHz (5.5–18 GHz, covering 89% within the tested frequency band) even at 1100°C. Notably, it maintains stable absorption against oblique incidence (within 40°) under transverse electric polarization. The broadband absorption mechanism of the wide temperature domain and the oblique incidence is ascribed to optimized gradient impedance matching and multiple attenuation resulting from multiscale design. This study points to the avenue for fabrication of high-performance EMW absorption metamaterial that synergizes broadband, wide temperature domains, as well as oblique incidence insensitivity.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"11 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Controllable phase transformation and static recrystallization inducing excellent strength-plasticity synergy in powder sintered Cu-18Sn-0.3Ti alloy","authors":"Lin Shi, Juntao Zou, Zhe Zhang, Tong Dang, Shuhua Liang, Lixing Sun, Lei Zhu, Junsheng Cheng, Wenlong Han, Dazhuo Song, Yuxuan Wang, Yihui Jiang, Rong Fei, Yuchen Song","doi":"10.1016/j.jmst.2025.03.111","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.111","url":null,"abstract":"Coarse grains and uncontrolled phase constituents have significant adverse effects on the mechanical properties of Cu-18Sn-0.3Ti alloy, thus restricting the preparation of Nb₃Sn superconducting wires with higher critical current density. In this work, the strength-plasticity enhancement of powder sintered Cu-18Sn-0.3Ti alloy was realized through inducing static recrystallization and controlling phase transformation. The ultimate tensile strength, yield strength and elongation of the alloy were increased from 507.2 MPa, 229.4 MPa and 23.4% to 677.0 MPa, 359.9 MPa and 38.9%, respectively. Through first-principles calculations, molecular dynamics simulation, detailed thermodynamic assessment and kinetic analysis, δ-Cu₄₁Sn₁₁ and ε-Cu₃Sn phases were determined to be harmful to the plastic deformation of alloy, and the annealing temperature of no more than 600°C can reduce the volume fraction of Sn-rich phases, promote the phase transformation from δ phase to β-Cu₁₇Sn₃ and γ-Cu₃Sn phases, and inhibit the formation of ԑ phase, which verified the experimental results. The phase constituent conductive to plastic deformation of alloy, fine grains and high-density annealing twins were the main reasons for the strength-plasticity enhancement of alloy. The results lay a foundation for the preparation of Nb₃Sn superconducting wires and provide theoretical guidance for the strength-plasticity enhancement of other multi-component alloys.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"687 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First-principles study of the effect of solute co-segregation on Y {101¯1} twin boundary","authors":"Yuguo Sun, Yuanxu Zhu, Guanlin Lyu, Kai Wang, Panpan Gao, Ping Qian","doi":"10.1016/j.jmst.2025.06.017","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.06.017","url":null,"abstract":"The segregation behavior of solute at grain boundaries (GBs) will change the macroscopic properties of GBs, which in turn affect the properties of the material. In this study, we systematically investigate the effects of the segregation behavior of solute X (Nb, Mo, Ru, Ag, Hf, W, Re, Pt, Bi) near the Y {10<span><math><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover></math></span>1} twin boundaries (TBs), as well as the effect of X-Z co-segregation behavior on the stability and strength of the TBs based on the first-principles calculations. The results show that the solute segregation of Ru and Pt can improve the stability and strength of TB, but the contribution of Ru in stabilizing TB and Pt in strengthening TB is relatively limited. Based on the Rice-Wang model and combined with grain boundary energy, strengthening energy, and first-principles computational tensile test, it is found that Ru-Bi co-segregation significantly enhances the strength and stability of TB. The corresponding charge density difference and density of electronic state analysis show that Ru-Bi co-segregation significantly enhances the bond cooperation between atoms near the grain interface and reveals the microscopic mechanism of strengthening the TB from the electronic structure level. The aim of this study is to provide theoretical support for the optimal design and property regulation of yttrium-based alloys.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"30 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring Ni, Nb in commercial FeCo-V soft magnetic alloys to promote strength-coercivity synergy","authors":"Xuan Zhao, Zhenjie Guan, Mingyuan Ma, Li Liu, Xueyin Sun, Jiantang Jiang, Wenzhu Shao, Liang Zhen","doi":"10.1016/j.jmst.2025.05.062","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.062","url":null,"abstract":"High yield strength is crucial for soft magnetic materials (SMMs) applied for high-speed power generators to maximize rotation speed and load. Traditional SMMs are therefore developed with “unclean” microstructures, namely, to increase obstacles like solid solution atoms, grain boundary, or second-phase particle-to-pin dislocation motion and further increase the yield strength. This alloy design strategy poses a significant challenge for coercivity, yet SMMs serving in generators must reduce energy consumption owing to hysteresis losses. This work presents a comprehensive investigation of composition and annealing process optimization to overcome the trade-off between coercivity and strength. Nb and Ni elements addition introduces solid solute atoms and precipitation. Solid solute atoms promote yield strength through solid solution strengthening and coercivity through forming internal stress to reverse domain orientation. Hard magnetic NbCo₃ second-phase particle has a higher anisotropy constant <em>K</em>₁ than the matrix, significantly hinders magnetic domain wall motion while has little effect on dislocation movement, resulting larger increment in coercivity than yield strength. The small-sized precipitations through annealing were considered. Proper annealing process can also obtain γ-fiber texture, low dislocation, and high grain boundary density to elevate yield strength and mining coercivity. The developed FeCo-V-Ni-0.3Nb alloy demonstrates impressive high yield strengths of 764 MPa and low coercivity of 198 A m⁻¹. Compared to commercial HiperCo50 HS alloy, the present alloy exhibits ∼29% yield strength increase and ∼60% coercivity decrease. We also proposed a model <span><math><mrow is=\"true\"><msub is=\"true\"><mi is=\"true\">H</mi><mtext is=\"true\">cp</mtext></msub><mo is=\"true\" linebreak=\"goodbreak\">=</mo><mfrac is=\"true\"><mrow is=\"true\"><msub is=\"true\"><mi is=\"true\">δ</mi><mtext is=\"true\">particle</mtext></msub><msub is=\"true\"><mi is=\"true\">V</mi><mi is=\"true\" mathvariant=\"normal\">p</mi></msub></mrow><mrow is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">+</mo><mtext is=\"true\">exp</mtext><mo is=\"true\">(</mo><mrow is=\"true\"><msub is=\"true\"><mi is=\"true\">δ</mi><mtext is=\"true\">matrix</mtext></msub><mo is=\"true\">−</mo><mi is=\"true\">A</mi><mi is=\"true\">a</mi><mi is=\"true\">D</mi><mroot is=\"true\"><mrow is=\"true\"><mi is=\"true\">π</mi><mo is=\"true\">/</mo><mn is=\"true\">6</mn><msub is=\"true\"><mi is=\"true\">V</mi><mi is=\"true\" mathvariant=\"normal\">p</mi></msub></mrow><mn is=\"true\">3</mn></mroot></mrow><mo is=\"true\">)</mo></mrow></mfrac></mrow></math></span> to estimate coercivity increment for magnetic second-phase particles.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"21 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144578269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Abnormal nucleation and growth of He bubbles in NbZrTi-based refractory high entropy alloys","authors":"Jinxue Yang, Zhengxiong Su, Shehu Adam Ibrahim, Ping Zhang, Qingmin Zhang, Jianqiang Wang, Lu Wu, Xiaoyong Wu, Chenyang Lu","doi":"10.1016/j.jmst.2025.05.061","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.061","url":null,"abstract":"This study investigates the abnormal nucleation and growth of helium (He) bubbles in NbZrTi-based refractory high entropy alloys (RHEAs). NbZrTi, NbZrTiHf, and NbZrTiHfV alloys were subjected to 400 keV He ions irradiation with a fluence of 1 × 10¹⁷ cm⁻² at temperatures ranging from 623 to 723 K. Spherical aberration-corrected transmission electron microscopy was employed to analyze the distribution of He bubbles in each irradiated alloy, as well as the distribution of elements and atomic structure modifications around the bubbles. In NbZrTi, semi-coherent Zr-rich precipitates were observed near He bubbles, whereas NbZrTiHf and NbZrTiHfV exhibited semi-coherent hexagonal close-packed precipitates enriched in Zr and Hf. Additionally, NbZrTiHfV displayed coherent body-centered cubic precipitates enriched in V throughout the irradiated region. The results indicate that semi-coherent precipitates, owing to their higher interfacial energy, significantly affect He bubble nucleation and growth, leading to a non-uniform distribution of large He bubbles. Notably, all three alloys exhibited abnormally large He bubbles compared to pure Nb and face-centered cubic HEAs under identical irradiation conditions. This can be attributed to the lower vacancy formation and migration energies in NbZrTi-based RHEAs, which increase vacancy concentration and mobility during irradiation, thereby promoting the diffusion and growth of He atoms. These findings provide insights into the irradiation behavior of NbZrTi-based RHEAs, contributing to the design of advanced materials for nuclear applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"21 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144568766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Insight into the influence of solid solution Mn on corrosion resistance of low carbon steel in brackish water: Experimental and theoretical investigation","authors":"Xing Gao, Chen Liu, Jie Wei, Junhua Dong, Xingqiu Chen, Pei Wang, Wei Ke","doi":"10.1016/j.jmst.2025.05.060","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.05.060","url":null,"abstract":"As an essential alloy element in the steel industry, Mn plays an important role in improving the mechanical properties of steel. However, the effect of Mn on the corrosion resistance of steel is still unclear. In this paper, the influence of solid solution Mn on the corrosion resistance of low carbon steel in brackish water was explored by combining experiments with theoretical calculations. Chemical analysis, surface element analysis, the first-principle’s calculation and activation energy calculation indicate that Mn dissolves preferentially than Fe, and it first enters the solution in the form of Mn²⁺ leaving vacancies in the surface layer of substrate, which reduces the energy barrier of surrounding iron dissolution, promotes the dissolution of Fe and accelerates the corrosion of substrate. Subsequently, continuously enriched Mn²⁺ in solution partially transforms into MnFe₂O₄, which exists in the rust layer and promotes the formation of α-FeOOH. Finally, a protective rust layer forms on the steel surface, which slows down the long-term corrosion of steel.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"20 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144565746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}