Journal of Materials Science & Technology最新文献

{"title":"A strong joint for single crystal superalloys by constructing mortise-tenon boundaries with interlocking effect","authors":"Taiyong Zou, Zheng Ye, Zhenqian Lang, Tao Wu, Wanli Wang, Qiaomu Liu, Jian Yang, Shuhai Chen, Jihua Huang","doi":"10.1016/j.jmst.2024.12.100","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.100","url":null,"abstract":"A special grain boundary morphology, called \"mortise-tenon boundary\" was conceived and successfully implemented. By the dissolution and renucleation process in an equal/near-substrate-composition interlayer, the mortise-tenon boundaries were constructed in a polycrystalline joint to achieve fast and high-performance bonding of single crystal superalloys. A mechanism of alternate epitaxial growth between two adjacent grains was found, which controls the formation and degree of the mortise-tenon. The causal relationship between the degree of the mortise-tenon and the heating rate was elucidated. With the degree of the mortise-tenon increasing, the interlocking effect of the mortise-tenon boundaries was enhanced. Benefited from the interlocking effects of the mortise-tenon boundaries, the joint acquired a tensile strength equal to that of the base material at 980°C and a rupture lifetime increased by 4.6 times under the stress of 147 MPa.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"16 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672574","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":"Mechanism of interfacial Si enrichment in hindering Fe-Zn alloying and its morphological evolution during annealing in Zn-coated Si-bearing steels","authors":"Hyungkwon Park, Seong Hoon Kim, Jin-Jong Lee, Ki-Hwan Kwon, Kyeong-Won Kim, Chang-Hoon Lee, Yeong-Do Park, Tae-Ho Lee","doi":"10.1016/j.jmst.2025.02.028","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.028","url":null,"abstract":"Retained austenite plays a significant role in third-generation advanced high-strength steels (AHSS 3. Gen.), renowned for their excellent combination of strength and ductility. Silicon (Si) is a key element in stabilizing retained austenite. However, it introduces challenges in galvannealing and welding processes in Zn-coated steels, such as inhibited Fe-Zn alloying and increased susceptibility to liquid metal embrittlement (LME). This study investigated the mechanism of Si enrichment at the Zn/steel interface and its role in suppressing Fe-Zn interdiffusion during annealing. Using advanced techniques such as high-resolution transmission electron microscopy and atomic probe tomography, and Thermo-Calc DICTRA simulations, we analyzed the diffusion behavior and microstructural evolution in Zn-coated steels with varying Si contents. Si, driven by its low solubility in liquid Zn and Fe-Zn intermetallic phases, accumulates at the interface, forming a Si-enriched region that significantly suppresses Zn diffusion while permitting limited Fe diffusion. Numerical simulations revealed that the Si-enriched layer forms via the drag effect of the Fe-Zn reaction line, progressively concentrating Si at the interface as Zn diffuses. As annealing progresses, the morphology of the Si-enriched region evolves from layered, cloud-like structures to droplets and elongated dendritic forms, driven by Zn penetration and Fe consumption. These findings provide novel insights into the role of Si enrichment in mitigating LME and optimizing the Zn-coated AHSS 3. Gen., paving the way for advancements in automotive material design.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"8 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672575","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":"Effect of stress-induced martensite and reverse-induced dislocation on α phase precipitation behavior in a metastable β-Ti alloy","authors":"Luyao Tang, Puyi Gao, Jiangkun Fan, Wenyuan Zhang, Ding Zhao, Yinfan Ma, Panpan Fan, Zhixin Zhang, Jinshan Li","doi":"10.1016/j.jmst.2025.01.049","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.049","url":null,"abstract":"Achieving precise control over α phase precipitation is crucial for obtaining ultra-high strength in metastable β-Ti alloys. However, a comprehensive understanding of how deformation products and their reversion counterparts influence α phase precipitation behavior in these exceptional alloys remains elusive. This study explores the influence of strain-induced martensite (SIM) and its reversion-induced dislocation on the α phase precipitation behavior in a metastable β-Ti alloy. After loading and reloading, SIM lath formed, and some SIM laths subsequently reversed into the β phase, introducing band-like regions with dense and parallel arranged <110> dislocations in the β phase matrix. Such dislocations resulted in a band-like area decorated with short rod-like α phase precipitates during isothermal annealing. Meanwhile, the remained strain-induced martensite decomposed directly into α phase, forming a long α phase with a morphology similar to the original martensite. Additionally, both sides of the original SIM laths reversed during isothermal annealing, forming {332}<113>_β twins at the α/β phase interface. This divided the α phase formed in SIM laths from the α phase formed directly in the β matrix.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"183 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143672763","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":"Resin-free aramid honeycombs with extraordinary microwave absorption, thermal insulation, flame retardant and mechanical performance","authors":"Hao Sun, Meiyun Zhang, Dexian Ji, Cong Ma, Baolong Yuan, Ronghua Feng, Jiaojun Tan, Bin Yang","doi":"10.1016/j.jmst.2025.02.025","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.025","url":null,"abstract":"Although lightweight aramid paper honeycombs are highly desirable for microwave absorption owing to their dual functions of both load-bearing and microwave-absorbing, unsatisfactory microwave absorption, inferior mechanical and inadequate thermal properties present significant challenges for practical applications in diverse complex scenarios. Herein, lightweight, high-strength and flame-retardant aramid nanofibers-based honeycombs (MANHs) for integrated microwave absorption and thermal insulation are successfully fabricated via the hydrogen bonding assembly, mold forming and aerogel filling strategy using aramid waste as raw material. The dense network structure formed by the interwoven aramid nanofibers (ANFs) in the honeycomb body acts as a framework endows the MANH with impressive mechanical performance, and the specific strength and toughness of MANH reach 153.6 MPa g⁻¹ cm⁻³ and 13.9 MJ m⁻³, respectively, which are 3.5 and 19 times higher than those of commercial microwave absorption honeycombs (CMAH). The ultralight MXene/ANFs aerogels (a density of 25 mg cm⁻³) with multiscale pore structure filled in the honeycomb apertures give the honeycomb outstanding microwave absorption performance, with a minimum reflection loss of −62.5 dB, and can cover the entire X-band with a thickness of only 3.5 mm. Meanwhile, compared with CMAH, the thermal insulation and flame-retardant performance of MANH are also significantly improved. Notably, MANH also demonstrates favorable sound absorption performance at high-frequency bands. The MANH is considered to be a promising candidate for aerospace and military stealth applications as a result of its lightweight, high strength, exceptional microwave absorption, and remarkable thermal insulation performance.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"33 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666242","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":"A novel multi-scale strategy to reveal martensitic transition and strengthening mechanism in Ti6Al4V alloy","authors":"Tingzhen Ren, Cheng Lin, Fei Li, Yanhua Shi, Qihang Ma, Shixing Huang, Guili Yin","doi":"10.1016/j.jmst.2025.01.048","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.048","url":null,"abstract":"The preferred microstructure and formation of variants during martensitic transformation of titanium alloys are very important for understanding and optimizing the mechanical properties of alloys. However, the main contribution of variant selection in the past two decades mainly focused on the issues associated with the interfaces, and a comprehensive explanation at the micro atomic level is still lacking. In the current work, EBSD, TEM, and SEM were used to analyze the essence of variant selection in combination with the valence electron theory of alloys (VE-theory) and cellular automata (CA) modeling. The results show that the driving force and atom path can be demonstrated for the collective shear and rotation displacements of atoms in martensitic transition; the martensitic variant selection in Ti6Al4V alloy has greater randomness in three aspects, namely area ratio of martensitic variants, two variants formed by the same crystal plane of parent phase <em>β</em>, and the distribution ratios of five typical grain boundaries. The preferred selection of <em>α</em>' variant is mainly affected by atom interaction and element distribution, especially Al and V elements. The dislocation pile-up and the soft <em>β</em> phase in martensitic variants are two of the main factors to affect the hardness variation of lath martensite and acicular martensite.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"92 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666219","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":"Enhanced charge carrier transport in TiO2/COF S-scheme heterojunction for efficient photocatalytic H2O2 production","authors":"Yang Liu, Meng Li, Tao Liu, Zhen Wu, Liuyang Zhang","doi":"10.1016/j.jmst.2025.03.005","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.005","url":null,"abstract":"Hydrogen peroxide (H₂O₂) is a crucial oxidant with diverse industrial applications, yet its conventional synthesis suffers from high energy consumption and hazardous byproducts. Photocatalysis offers a sustainable alternative, but its efficiency is often compromised by rapid charge recombination. Herein, we reported the rational design of a TiO₂/TD-COF S-scheme heterojunction, which achieved a remarkable H₂O₂ production rate of 2162.3 μmol g⁻¹ h⁻¹, representing almost 14-fold enhancement compared to pristine TiO₂. Through in-situ irradiated X-ray photoelectron spectroscopy (ISI-XPS) and femtosecond transient absorption spectroscopy (fs-TAS), we demonstrate an ultrafast charge transfer driven by internal electric field (IEF) that efficiently separates photogenerated carriers while preserving their redox potentials. Furthermore, in-situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and electron paramagnetic resonance (EPR) spectroscopy provide direct experimental evidence for the dual-pathway mechanism, involving both the oxygen reduction reaction (ORR) and water oxidation reaction (WOR). This work demonstrates the potential of S-scheme heterojunction in overcoming the limitations of traditional photocatalytic systems, offering a scalable and sustainable approach for solar-driven H₂O₂ production.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"21 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143666243","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":"Electron beam powder bed fusion of TiAl alloy with controllable microstructure and strength","authors":"Yulin Sun, Yang Chen, Zhixiang Qi, Gong Zheng, Daixiu Wei, Henggao Xiang, Nan Liu, Xianghui Wang, Xi Pan, Jian Wang, Guang Chen","doi":"10.1016/j.jmst.2025.03.004","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.03.004","url":null,"abstract":"TiAl alloys fabricated by electron beam powder bed fusion (EB-PBF) usually exhibit special microstructures with alternating fine-grained (FG) regions and coarse-grained (CG) bands. In previous studies, the CG microstructures were equiaxed γ phases, and the FG microstructures presented three types: near gamma, duplex, and nearly lamellar. However, the rule for controlling FG microstructures has not been found. Hence, a method needs to be built to find the rule for controlling FG microstructures. Here, we established a normalized process diagram by combining Al-equivalent and dimensionless process parameters. Based on the normalized process diagram, we successfully control the FG microstructures and customize three FG microstructures of the Ti-48Al-2Cr-2Nb alloy. Meanwhile, the average tensile yield strength reaches 756 MPa when the FG microstructure is near gamma. The yield strength is higher than the previous data for the Ti-48Al-2Cr-2Nb alloy. This is attributed to the strong interface-strengthening effect between FG near-γ microstructures and CG γ bands. These findings can help shorten the development cycle of the other TiAl alloys fabricated by EB-PBF, improving the mechanical properties of the other EB-PBF-built TiAl alloys in the future.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"8 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660343","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":"Effect of F− on photocatalytic H2O2 evolution activity of g-C3N4 nanotubes and fs-TAS mechanism study","authors":"Xin Zhou, Songyu Yang, Xiaojing Wang, Zhen Wu, Yiting Huo, Jianjun Zhang","doi":"10.1016/j.jmst.2025.02.027","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.027","url":null,"abstract":"Hydrogen peroxide (H₂O₂) is extensively used in medical disinfection, water treatment, and environmental protection. To achieve the green synthesis of H₂O₂, g-C₃N₄-based photocatalysis is an effective strategy and shows great potential. Nonetheless, single g-C₃N₄ exhibits poor photocatalytic properties due to severe photogenerated charge recombination. To solve this challenge, this work enables F^–adsorption on the surface of g-C₃N₄ nanotubes in solution driven by Coulomb forces through pH adjustment and the addition of NH₄F. The photocatalytic H₂O₂ production rate of the optimal F^–-decorated g-C₃N₄ is three times higher than that of pure g-C₃N₄, attributing to the synergistic effect of F^–and H⁺. Quenching experiments verify that the photocatalytic H₂O₂ production process of CNF is a two-electron oxygen reduction process. Electron quenching dynamics of g-C₃N₄ and CNF are revealed by femtosecond transient absorption spectroscopy (fs-TAS). Compared to pure g-C₃N₄, CNF has an additional ultrashort lifetime (3.1 ps) representing the interfacial electron transfer from the conduction band of g-C₃N₄ to F^–. In situ fs-TAS results show that the interfacial electron transfer rate and electron utilization efficiency are respectively increased from 1.5×10⁸ s^–1 and 19% in air to 5.0×10⁸ s^–1 and 45% in O₂ atmosphere with ethanol sacrificial agent. Hence, the O₂, H⁺, and photogenerated electrons are key substances in the H₂O₂ evolution. This work has elucidated the dynamics mechanism of enhanced photocatalytic performance of F^–-modified g-C₃N₄ and provides inspiration for the design and synthesis of efficient g-C₃N₄-based photocatalysts.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"88 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660342","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":"Scalable topological-entanglement conductive coaxial fibers with superior durability for wearable strain sensing and triboelectric fabric","authors":"Yulong Wang, Xia Liu, Chengyu Li, Wei Wang, Di Guo, Mengmeng Jia, Shidai Tian, Lingyu Wan, Aifang Yu, Junyi Zhai","doi":"10.1016/j.jmst.2024.12.096","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.096","url":null,"abstract":"Although flexible, stretchable, and conductive core-sheath structured smart fibers have propelled to the forefront research in wearable strain sensors and self-powered electronics, challenges related to scalability, complexity, and mechanical durability remain. In this study, we propose a strategy for the scalable production of conductive coaxial fiber (CCF) with superior durability through one-step direct wet spinning coherent solutions. By introducing the polystyrene-block-polyisoprene-block-polystyrene phase in both inner and outer layers, CCFs feature an interleaved topology and share a similar modulus, successfully resolving the issue of layer separation over time. They can endure up to 15000 cycles with no damage at a strain of 100%. In addition, the topological entanglement CCF as a strain sensor exhibits a broad operational range of up to 398.3% strain, outstanding sensitivity (i.e., gauge factor = 6713 at 398.3% strain) and swift response time (248 ms). Enhanced by machine learning, the system achieves a high accuracy rate of 95% in gait recognition and 100% in American Sign Language identification. Furthermore, the CCF can function as a wearable triboelectric nanogenerator (TENG) for self-powered sensing and mechanical energy harvesting. This study represents a significant step toward the development of multifunctional micro-wearable electronic devices, which hold immense promise for medical sensing and energy harvesting in smart wearable electronics, human-computer interaction, and artificial intelligence.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"25 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660345","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":"Electrically assisted pressure joining of dissimilar copper C11000 and aluminum 6061-T6 alloys","authors":"Tu-Anh Bui-Thi, Thanh Thuong Do, Van Cong Phan, Sung-Tae Hong, Yijae Kim, Heung Nam Han","doi":"10.1016/j.jmst.2025.02.026","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.026","url":null,"abstract":"The effect of current density on electrically assisted solid-state bulk joining, so-called electrically assisted pressure joining (EAPJ), of copper (Cu) C11000 and aluminum (Al) 6061-T6 alloys is investigated. During EAPJ, various combinations of electric current density and duration are applied to the cylindrical specimen assembly to reach a fixed peak temperature during continuous axial compressive plastic deformation. Then, an additional electric current is periodically applied to the specimen assembly without plastic deformation to keep the temperature elevated. Microstructural observation confirms that the defect-free joint of the selected material combination is fabricated without melting and solidification. The athermal effect of electric current on the diffusion enhancement can be accommodated by introducing the effective activation energy or the effective temperature. The microstructural analysis also demonstrates that the current density both increases the thickness of the intermetallic compound (IMC) layer at the joint interface and affects the microstructural evolution of joining materials. Finally, the mechanical properties of the joint are strongly affected by the electric current density. The present study provides insight into the effect of electric current density on the solid-state joining mechanism of EAPJ of dissimilar material combinations.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"6 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143660416","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}