Materials最新文献_第10页

Effect of Ultrasonic Rolling on the Surface Integrity and High Temperature Oxidation Properties of Laser Melted NiCrAl Coatings. 超声轧制对激光熔覆NiCrAl涂层表面完整性及高温氧化性能的影响。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174119

Dejiang Zhang, Chengchao Hu, Xubo Liu, Dewei Hu, Ting Yu, Jiaming Zhan

{"title":"Effect of Ultrasonic Rolling on the Surface Integrity and High Temperature Oxidation Properties of Laser Melted NiCrAl Coatings.","authors":"Dejiang Zhang, Chengchao Hu, Xubo Liu, Dewei Hu, Ting Yu, Jiaming Zhan","doi":"10.3390/ma18174119","DOIUrl":"https://doi.org/10.3390/ma18174119","url":null,"abstract":"This study investigates the effects of ultrasonic surface rolling process (USRP) parameters-static load, indentation depth-on the surface integrity, mechanical properties, and high-temperature oxidation properties of laser-clad NiCrAl coatings. Comprehensive experimental results demonstrate that USRP treatment effectively eliminates surface cracks and significantly enhances surface integrity. The process simultaneously improves mechanical properties, with microhardness increasing by 24.6% due to grain refinement-induced strengthening and elevated dislocation density. Under constant preload, increasing the ultrasonic rolling indentation depth effectively transforms residual tensile stress into beneficial compressive stress (from +69.8 MPa to -1315.3 MPa), with higher preload further enhancing this effect. Moreover, USRP-treated coatings achieve complete oxidation resistance at elevated temperatures by forming a denser and more continuous oxide layer while effectively suppressing internal oxidation, resulting in markedly improved high-temperature oxidation performance. Quantitative analysis confirms that the enhancement in surface mechanical properties is primarily attributed to microstructural refinement and dislocation strengthening mechanisms.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Optimizing Welding Sequence and Improving Welding Process for Marine Thick-Walled Circular Pipes. 船用厚壁圆管焊接顺序优化与焊接工艺改进。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174128

Tao Ma, Mingguan Fan, Haipeng Miao, Wei Shang, Mingxin Yuan

{"title":"Optimizing Welding Sequence and Improving Welding Process for Marine Thick-Walled Circular Pipes.","authors":"Tao Ma, Mingguan Fan, Haipeng Miao, Wei Shang, Mingxin Yuan","doi":"10.3390/ma18174128","DOIUrl":"https://doi.org/10.3390/ma18174128","url":null,"abstract":"To reduce welding deformation during the automated welding of thick-walled pipes in shipbuilding and thereby improve welding quality, a segmented multi-layer multi-pass welding sequence optimization and process improvement strategy is proposed. Firstly, based on a welding model for thick-walled pipes, a multi-layer multi-pass welding trajectory equation is established. A double-ellipsoidal moving heat source is adopted to design a circular multi-layer multi-pass double-ellipsoidal heat source model. Secondly, three circular pipe workpieces with different wall thicknesses are selected, and four segmented welding sequences are simulated using welding finite element analysis (FEA). Finally, based on the optimal segmented welding sequence, the welding process is improved, and optimal welding process parameters are determined based on deformation and residual stress analysis. The results of the segmented multi-layer multi-pass welding sequence optimization show that the skip-symmetric welding method yields the best results for thick-walled circular pipes. Compared to other welding sequences, it reduces welding deformation by an average of 6.50% and welding stress by an average of 5.37%. In addition, process improvement tests under the optimal welding sequence indicate that the best welding quality is achieved under the following conditions: for 10 mm thick pipes-200 A current, 24 V voltage, and 11.5 mm/s welding speed; for 15 mm thick pipes-215 A, 24.6 V, and 10 mm/s; and for 20 mm thick pipes-225 A, 25 V, and 11 mm/s.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Low-Temperature Molten Oxide Electrolysis of a Mixture of Hematite and Zinc Oxide. 赤铁矿-氧化锌混合物低温熔融电解研究。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174116

Joongseok Kim, In-Ho Jung, Jungshin Kang, Kyung-Woo Yi

引用次数: 0

An Elastoplastic Constitutive Model for Steel Slag Aggregate Concrete Under Multiaxial Stress States Based on Non-Uniform Hardening Theory. 基于非均匀硬化理论的钢渣骨料混凝土多轴应力状态弹塑性本构模型。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174124

Zhijun Chen, Liang Huang, Yiwei Yang, Teng Dong

{"title":"An Elastoplastic Constitutive Model for Steel Slag Aggregate Concrete Under Multiaxial Stress States Based on Non-Uniform Hardening Theory.","authors":"Zhijun Chen, Liang Huang, Yiwei Yang, Teng Dong","doi":"10.3390/ma18174124","DOIUrl":"https://doi.org/10.3390/ma18174124","url":null,"abstract":"Steel slag aggregate concrete (SAC) is widely recognized as a high-performance and sustainable construction material. However, its broader structural application has been impeded by the limited development of reliable constitutive models. Building upon the well-established non-uniform hardening plasticity theory, this study proposes a comprehensive theoretical framework to establish a stress-strain relationship model for SAC under complex stress states. To this end, a multiaxial elastoplastic constitutive model for SAC is developed through the following steps: (1) The Guo-Wang failure criterion is employed as the bounding surface, from which a yield criterion is formulated to capture the characteristic mechanical responses of SAC under multiaxial loading; (2) Based on fundamental plasticity theory, the stress-strain relationship is derived by integrating the proposed yield function with a non-associated flow rule using a Drucker-Prager-type plastic potential function, while ensuring consistency conditions are satisfied; (3) A parameter calibration methodology is introduced and applied using experimental data from uniaxial and multiaxial tests on SAC; (4) A numerical implementation scheme is developed in MATLAB 2024a, and the model is validated through computational simulations. The validation results confirm that the proposed model reliably captures the stress-strain behavior of SAC under complex loading conditions. Overall, this study not only delivers a robust multiaxial constitutive model for SAC, but also offers a systematic modeling approach that may serve as a reference for the further development of constitutive theories for steel slag-based concretes and their broader application in structural engineering.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Efficient Electrolytic Refining of Crude Solder Assisted by Additives in a Fluosilicic Acid System. 氟硅酸体系中添加剂辅助下粗焊料的高效电解精炼。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174122

Yuantao Yang, Zhaoyi Wang, Xuanbing Wang, Wanli Xu, Haibin Yuan, Qingdong Liu, Ruidong Xu, Linjing Yang

{"title":"Efficient Electrolytic Refining of Crude Solder Assisted by Additives in a Fluosilicic Acid System.","authors":"Yuantao Yang, Zhaoyi Wang, Xuanbing Wang, Wanli Xu, Haibin Yuan, Qingdong Liu, Ruidong Xu, Linjing Yang","doi":"10.3390/ma18174122","DOIUrl":"https://doi.org/10.3390/ma18174122","url":null,"abstract":"Current electrolytic refining processes for crude solder commonly employ fluosilicic acid (H2SiF6) as the electrolyte with bone glue and β-naphthol additives yet suffer from poor electrolyte stability, coarse cathode crystallization, low current efficiency, and high energy consumption, adversely affecting product quality and economic viability. In order to solve these limitations, electrochemical techniques, XRD, SEM, and ICP-OES were used to study the effects of gelatin and sodium lignosulfonate on the deposition overpotential and cathode morphology, as well as the effects of process parameters on current efficiency and energy consumption. A novel approach was developed using an H2SiF6 system enhanced by gelatin and sodium lignosulfonate for crude solder refining. After optimization, 120 h electrolysis achieved a current efficiency >97.8%, smooth/dense cathode surface, average cell voltage of 0.24 V, and energy consumption of 98.15 kWh/t. Efficient deposition of 81.2% Sn and 75.2% Pb on the cathode was realized, while >93.3% of Sb, Bi, Ag, Cu, and As were enriched in anode slime to facilitate valuable metal recovery, and >90.6% of In/Al concentrated in the electrolyte enabled effective Sn-Pb impurity separation. This study provides theoretical and technical foundations for advancing sustainable and economical electrolytic refining of crude solder.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Energy-Selective X-Ray Detection Using Chemically Tunable High-Z Nanocomposites. 利用化学可调谐高z纳米复合材料进行能量选择性x射线探测。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174118

Inga Pudza, Kaspars Pudzs, Andrejs Tokmakovs, Aleksandr Kalinko, Alexei Kuzmin

引用次数: 0

Effect of Back-Tempering on the Wear and Corrosion Properties of Multiple-Pass Friction Stir Processed High-Speed Steel. 回火对多道次搅拌摩擦加工高速钢磨损和腐蚀性能的影响。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174125

Quan Liu, Shiye Li, Guochong Rao, Xiaomi Chen, Kun Liu, Min Zhou, Dawei Guo, Valentino A M Cristino, Kin-Ho Lo, Lap-Mou Tam, Chi-Tat Kwok

{"title":"Effect of Back-Tempering on the Wear and Corrosion Properties of Multiple-Pass Friction Stir Processed High-Speed Steel.","authors":"Quan Liu, Shiye Li, Guochong Rao, Xiaomi Chen, Kun Liu, Min Zhou, Dawei Guo, Valentino A M Cristino, Kin-Ho Lo, Lap-Mou Tam, Chi-Tat Kwok","doi":"10.3390/ma18174125","DOIUrl":"https://doi.org/10.3390/ma18174125","url":null,"abstract":"In this study, a scalable surface modification strategy for M2 high-speed steel was applied using multiple-pass friction stir processing (FSP) with overlapping ratios of 25%, 50%, and 75%. A comprehensive investigation of the microstructure, surface hardness, wear, and corrosion resistance was conducted to elucidate the properties of FSPed M2 as a function of the overlapping ratio. In the single-pass FSPed M2, the major phase was martensite and the minor phases included retained austenite where refined carbides (M6C, M23C6, and MC) were detected. However, back-tempering occurred near the overlapped zone (OZ) between consecutive tracks for the multiple-pass FSPed M2. The martensite formed in the first pass was turned into tempered martensite by the thermal cycle from the subsequent pass. This back-tempering resulted in a localized decline in hardness from 900 to 650 HV0.2. Further wear tests revealed that the wear rates of the tempered zone (TZ) of the multiple-pass FSPed M2 (FSP25%: 1.40 × 10-5 mm3/N·m, FSP50%: 1.20 × 10-5 mm3/N·m and FSP75%: 1.00 × 10-5 mm3/N·m) are all higher than that of SZ of the single-pass FSPed M2 (0.75 × 10-5 mm3/N·m), indicating lower wear resistance of the TZ. Moreover, increased carbide content in the TZ led to the depletion of passivating elements near proximity of the tempered martensite, acting as the active sites for selective corrosion attack. The corrosion potential (Ecorr) and corrosion current density (Icorr) increased significantly, with values of -397.6 ± 5.6 mV and 9.5 ± 0.8 μA·cm-2 for FSP25%, -424.4 ± 6.0 mV and 14.7 ± 1.7 μA·cm-2 for FSP50%, and -440.9 ± 2.8 mV and 17.1 ± 1.9 μA·cm-2 for FSP75%.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Comparative Analysis of Structural Efficiency of Steel Bar Hyperbolic Paraboloid Modules. 钢筋双曲抛物面构件结构效率比较分析。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174127

Jolanta Dzwierzynska, Patrycja Lechwar

{"title":"Comparative Analysis of Structural Efficiency of Steel Bar Hyperbolic Paraboloid Modules.","authors":"Jolanta Dzwierzynska, Patrycja Lechwar","doi":"10.3390/ma18174127","DOIUrl":"https://doi.org/10.3390/ma18174127","url":null,"abstract":"Curved roofs constructed using hyperbolic paraboloid (HP) modules are gaining popularity in structural engineering due to their unique aesthetic and structural advantages. Consequently, these studies have investigated steel bar modules based on HP geometry, focusing on how variations in geometric configuration and bar topology affect internal force distribution and overall structural performance. Each module was designed on a 4 × 4 m square plan, incorporating external bars that formed the spatial frame and internal grid bars that filled the frame's interior. Parametric modeling was conducted using Dynamo, while structural analysis and design were performed in Autodesk Robot Structural Analysis Professional (ARSAP). Key variables included the vertical displacement of frame corners (0-1.0 m at 0.25 m intervals), the orientation and spacing of internal bar divisions, and the overall mesh topology. A total of 126 structural models were analyzed, representing four distinct bar topology variants, including both planar and non-planar mesh configurations. The results demonstrate that structural efficiency is significantly influenced by the geometry and topology of the internal bar system, with notable differences observed across the various structural types. Computational analysis revealed that asymmetric configurations of non-planar quadrilateral subdivisions yielded the highest efficiency, while symmetric arrangements proved optimal for planar panel applications. These findings, along with observed design trends, offer valuable guidance for the development and optimization of steel bar structures based on HP geometry, applicable to both single-module and multi-module configurations.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Determination of Tritium Transfer Parameters in Lithium Ceramics Li₂TiO₃ During Reactor Irradiation Based on a Complex Model. 基于复杂模型的Li2TiO3锂陶瓷反应堆辐照过程中氚转移参数的测定

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174117

Timur Zholdybayev, Timur Kulsartov, Zhanna Zaurbekova, Yevgen Chikhray, Asset Shaimerdenov, Magzhan Aitkulov, Saulet Askerbekov, Inesh Kenzhina, Assyl Akhanov, Alexandr Yelishenkov

{"title":"Determination of Tritium Transfer Parameters in Lithium Ceramics Li2TiO3 During Reactor Irradiation Based on a Complex Model.","authors":"Timur Zholdybayev, Timur Kulsartov, Zhanna Zaurbekova, Yevgen Chikhray, Asset Shaimerdenov, Magzhan Aitkulov, Saulet Askerbekov, Inesh Kenzhina, Assyl Akhanov, Alexandr Yelishenkov","doi":"10.3390/ma18174117","DOIUrl":"https://doi.org/10.3390/ma18174117","url":null,"abstract":"This paper presents the results of determining the parameters of tritium transfer processes in lithium ceramics Li2TiO3 under reactor irradiation conditions. Analysis of sections with a short-term decrease in reactor power allowed numerical determination of the Arrhenius parameters of tritium diffusion (pre-exponential factor and activation energy) based on comparison with in situ experimental data. The obtained values of activation energy (70.2-74.7 kJ/mol) and pre-exponential factor (0.9-2.1 × 10-8m2/s) demonstrate growth with increasing fluence, which is explained by the accumulation of radiation defects in ceramics. A linear dependence was established between D0 and Ea, corresponding to the Mayer-Noldel rule. Unlike previously conducted studies based on a phenomenological approach to assessing only the activation energy of diffusion, in this study, a complex model that takes into account temperature gradients, tritium generation, its diffusion, and release from the surface was used. The applicability of such an integrated approach to the analysis of in situ reactor experiments with lithium ceramics was confirmed, and allowed us to estimate changes in the tritium transfer parameters in lithium ceramics Li2TiO3 depending on the irradiation time.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145053849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Waste Surgical Masks as Precursors of Activated Carbon: A Circular Economy Approach to Mitigate the Impact of Microplastics and Emerging Dye Contaminants. 废弃外科口罩作为活性炭的前体：一种循环经济方法来减轻微塑料和新兴染料污染物的影响。

IF 3.2 3区材料科学

Materials Pub Date : 2025-09-02 DOI: 10.3390/ma18174115

María Del Mar García-Galán, Carlos A Fernández-Blanco, Eduardo M Cuerda-Correa, Juan M Garrido-Zoido, María F Alexandre-Franco

{"title":"Waste Surgical Masks as Precursors of Activated Carbon: A Circular Economy Approach to Mitigate the Impact of Microplastics and Emerging Dye Contaminants.","authors":"María Del Mar García-Galán, Carlos A Fernández-Blanco, Eduardo M Cuerda-Correa, Juan M Garrido-Zoido, María F Alexandre-Franco","doi":"10.3390/ma18174115","DOIUrl":"https://doi.org/10.3390/ma18174115","url":null,"abstract":"The COVID-19 pandemic has caused a surge in the use of disposable surgical masks, primarily composed of polypropylene (>86% carbon), whose improper disposal contributes to persistent microplastic pollution. In alignment with circular economy principles, this study explores the valorization of surgical masks into carbonaceous adsorbent materials (ACMs) for dye removal from water. The masks were chemically treated with concentrated H2SO4 at 85 °C for 2 h and subsequently activated with air (400 °C), CO2, or steam (800 °C, 1 h). The resulting ACMs were characterized by SEM, FT-IR, nitrogen adsorption at -196 °C, and pH of the aqueous carbon suspension (pHSus, 1.96-9.25). CO2 and steam activation yielded the highest surface areas (525 and 632 m2·g-1, respectively). FT-IR confirmed the introduction of sulfonic groups, enhancing dye interactions. Adsorption tests using methylene blue (MB), methyl orange (MO), and orange G (OG) in ultrapure and river water showed removal efficiencies up to 100% for MB with ACM-WV and ~94% with ACM. All dyes followed pseudo-second-order kinetics. These findings demonstrate that surgical mask waste can be effectively transformed into high-value adsorbents for water treatment applications.","PeriodicalId":18281,"journal":{"name":"Materials","volume":"18 17","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145054751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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