Composites Part B: Engineering最新文献

{"title":"Pit organ-inspired composite eutectogel electronic skin with integrated light-thermal-electric conversion for touchless multimodal human-computer interaction","authors":"Binyao Zhang,&nbsp;Guang Chen,&nbsp;Shuhuai Zheng,&nbsp;Weizhong Yuan","doi":"10.1016/j.compositesb.2025.112801","DOIUrl":"10.1016/j.compositesb.2025.112801","url":null,"abstract":"<div><div>Thermoelectric generator-based electronic skins (e-skins) have attracted considerable attention due to the effective utilization of low-grade heat. However, their working mode, based on thermal conduction, fundamentally limits non-contact and long-distance sensing capabilities. Herein, inspired by the infrared vision mechanisms of pit vipers, a unilateral-apertured multi-element array e-skin (UMES) with a pit structure analogous to the pit organ is developed based on light-thermal-electric (LTE) conversion composite eutectogel (LTEG) with high stretchability (2585 %), toughness (10.08 MJ m⁻³), and self-adhesion (156.32 kPa). The LTEG is composed of polymer chains with hydrogen-bond clusters, imidazole-triazine-ring porous polymer particles (ITPP), and iron-based redox pairs. These components synergistically form composite networks via hydrogen bonds and coordination bonds between ITPP and polymer chains, as well as coordination interactions of iron ions with the polymer matrix. Using the Fe³⁺/Fe²⁺ redox couple, a Seebeck coefficient of −2.06 mV K⁻¹ is achieved. The ITPP serve as photothermal units, emulating the thermosensitive cells of pit organs through photothermal conversion. Their intrinsic compatibility with the gel matrix eliminates the need for layered designs, thereby achieving integrated LTE conversion via a composite strategy. The unilateral-apertured structure of the UMES spatially confines infrared light to a predefined electrode region through perforated regions while shielding adjacent zones with opaque barriers, explicitly defining device polarity and eliminating reverse voltage interference. Consequently, the UMES is designed for touchless multimodal human-computer interactions (HCI), ranging from letter output on a smartphone to deep-learning-assisted remote control of drones. This work holds immense promise for next-generation self-powered e-skins in HCI.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112801"},"PeriodicalIF":12.7,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597480","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":"Biomimetic cellular face-bridging fiber composites with exceptional strength and toughness","authors":"Hao Wang ,&nbsp;Zhangyu Wu ,&nbsp;Zichun Zhu ,&nbsp;Peiyao Yan ,&nbsp;Jie Zhang ,&nbsp;Xianfeng Chen ,&nbsp;Deyu Niu ,&nbsp;Jie Tao ,&nbsp;Kai Jin ,&nbsp;Chaobin He","doi":"10.1016/j.compositesb.2025.112800","DOIUrl":"10.1016/j.compositesb.2025.112800","url":null,"abstract":"<div><div>Fiber-reinforced polymer structures are widely used in applications requiring strong, lightweight materials, such as in aerospace and automotive industries. Despite their high stiffness and strength, these materials often suffer from brittle fracture and shaping difficulties. This contrasts with natural lightweight biomaterials, such as bone, bamboo, and wood, which possess complex hierarchical structures that contribute to exceptional mechanical properties through directed self-assembly. Inspired by the hierarchical structure of bamboo, we propose a cellular face-bridging fiber structure and introduce interface entanglement strategy to achieve lightweight, high strength, toughness and impact resistance of the composite material. The resulting composites exhibits a density of 0.87 g/cm³, a specific strength of approximately 200 MPa/(g/cm³), toughness of nearly 244 kJ/m³, and an ultimate tensile elongation surpassing engineering composites and polymers. It also demonstrates good resistance to high-speed ballistic impact, with specific impact energy absorption comparable to traditional impact-resistant materials, such as Kevlar reinforced composites. Multi-scale simulations and experimental analyses reveal that the cellular face-bridging fiber structure, with its physically entanglement interface, enhances strength, toughness, and energy dissipation through fiber breaking, pull-out, interface cracking, and matrix slippage. The composite's thermoplastic processability allows for the fabrication of centimeter-scale structural parts, indicating promising potential for scalable production in lightweight aerospace applications.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112800"},"PeriodicalIF":12.7,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634321","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":"Robust and versatile metastructures’ manufacturing through fusion-bonding of thermoplastic composites","authors":"Victor Gaultier,&nbsp;Georgios A. Pappas,&nbsp;Paolo Ermanni","doi":"10.1016/j.compositesb.2025.112787","DOIUrl":"10.1016/j.compositesb.2025.112787","url":null,"abstract":"<div><div>Fiber-reinforced polymer metastructures, owing to their architectures and material properties, yield unique deformation schemes and load-bearing capabilities. Currently, the prevailing fabrication route of such structures relies on complex tooling to shape and consolidate thermoset-based composites. This study investigates the potential of fusion-bonding thermoplastic-based composites to reduce manufacturing's complexity of composite metastructures, expanding the design freedom, without compromising the load-carrying capabilities. To this end, a welding device specifically developed for the realization of composite metastructures is introduced. A parametric study on mode I fracture toughness at initiation was conducted to determine an ideal processing window. This analysis showed that dual polymer welding approach is key to reduce laminates' distortion, also providing welds with a mode I peeling toughness of 2.1 ± 0.1 kJ/m², a property very close to the one obtained via consolidation, with minor reduction (∼15 %) when curved laminates are welded. The potential of the technique is further showcased by two metastructure modules: a two-dimensional rotating chiral and a three-dimensional structure with compression-twist coupling, successfully manufactured and mechanically evaluated until failure. Furthermore, the demonstrators exhibit a remarkable resilience and showcase the reduction of manufacturing complexity resulting in an expansion of design freedom. The results highlight the potential of the fusion-bonding approach to create lightweight metastructures with high mechanical performance, paving the way for innovative applications in aerospace, automotive, and beyond.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112787"},"PeriodicalIF":12.7,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144634619","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":"4D printing shape memory PLA/Co/CNTOH composites with adaptive microwave absorption for reconfigurable metastructures","authors":"Ximing Zhang ,&nbsp;Shennan Guo ,&nbsp;Guoke Wei ,&nbsp;Hang Zhang ,&nbsp;Xingyu Hao ,&nbsp;Shujuan Tan ,&nbsp;Kui Liu ,&nbsp;Guangbin Ji","doi":"10.1016/j.compositesb.2025.112798","DOIUrl":"10.1016/j.compositesb.2025.112798","url":null,"abstract":"<div><div>Self-adaptive microwave stealth materials are crucial to meet the evolving demands of military applications. In this work, a PLA/Co/CNTOH filament was developed by incorporating hydroxyl-functionalized carbon nanotubes (CNT-OH) and Co into a polylactic acid (PLA) matrix. PLA/Co/CNTOH exhibits shape memory properties and microwave absorption performance. The reflection loss (RL) of PLA/Co/CNTOH-3 % filament reached −21.3 dB at 10.08 GHz with a thickness of 2.5 mm. In addition, the effective absorption bandwidth (EAB) was 3.24 GHz (8.6–11.84 GHz). Then, a foldable honeycomb structure was further designed to demonstrate the practical potential in achieving adaptive microwave absorption. Simulation results revealed that the EAB and the position of the RL_min peak exhibited directional shifts with changes in the folding angle, which indicates that the microwave absorption performance modulated through structural deformation. This work demonstrates the potential of shape memory materials for the adaptive microwave absorption systems.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112798"},"PeriodicalIF":12.7,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597476","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":"Analysis of the formation mechanism under different grinding conditions on the machining defects of needle-punched quartz fibre reinforced hybrid polymer matrix composites","authors":"Pengcheng Zhao ,&nbsp;Wenzhao An ,&nbsp;Liyu Wang ,&nbsp;Weiwei Xu ,&nbsp;Yutao Wang ,&nbsp;Xiaojin Shi ,&nbsp;Songmei Yuan","doi":"10.1016/j.compositesb.2025.112796","DOIUrl":"10.1016/j.compositesb.2025.112796","url":null,"abstract":"<div><div>To understand the defect forms of needle-punched quartz fibres reinforced hybrid polymer matrix composites, this study adopt end face and side face grinding and selected down and up grinding to conduct experiments. The results show that the macroscopic defects are mainly burrs and the microscopic defects are mainly fibre pull-out, fibre debonding, fibre bending and matrix interface broken. And it is found that the 90° fibre pull-out degrees of end face down grinding (EFDG) and end face up grinding (EFUG) were similar, which were 7.82 μm and 7.34 μm respectively, significantly lower than 53.57 μm of side face up grinding (SFUG) and 82.10 μm of side face down grinding (SFDG). The pull-out degree of the 0° fibre bundle showed the same variation pattern as that of the 90° fibre bundle, but its pull-out degree is significantly higher than that of the 90° fibre bundle, which were 34.92 μm (EFDG), 33.13 μm (EFUG), 61.46 μm (SFUG), and 256.56 μm (SFDG) respectively. By analyzing different grinding conditions, the effective action distance that plays a crucial role in defect formation is obtained, and the effective action distances of end face grinding and side face grinding are different. The grits of the internal end face play an important role in the formation of defects under EFUG and EFDG conditions. In addition, the support effects also vary under different grinding conditions. The joint support effect formed between the grits and the material &gt; the separate support effect of the material &gt; almost no support effect and only the grinding effect of grits.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112796"},"PeriodicalIF":12.7,"publicationDate":"2025-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144597481","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":"Lateral crashworthiness of Al/CFRP hybrid filament-wound Tubes: Meso-Scale modeling based on 3D yarn reconstruction","authors":"Hongyin Li ,&nbsp;Hongjian Gu ,&nbsp;Weidong Yan ,&nbsp;Xin Xie ,&nbsp;Xinyu Fan ,&nbsp;Zhongwei Yan ,&nbsp;Xigao Jian ,&nbsp;Liangliang Shen ,&nbsp;Jian Xu","doi":"10.1016/j.compositesb.2025.112789","DOIUrl":"10.1016/j.compositesb.2025.112789","url":null,"abstract":"<div><div>Lightweight thin-walled structures reinforced by filament-wound CFRP offer excellent lateral crashworthiness while meeting lightweight design requirements for aerospace and related applications. Owing to the complex stacked architecture resulting from winding paths, conventional testing methods are limited in capturing damage mechanisms. Consequently, a 3D winding path planning method was developed suited for complex rotational mandrels based on discrete surface meshes, enabling the construction of a fully 3D Al/CFRP numerical model that captures the mesoscopic yarn architecture with high fidelity. The lateral crashworthiness of Al/CFRP hybrid tubes was evaluated through quasi-static lateral compression experiments and finite element modeling. Results indicate that the Al/CFRP tubes exhibit stable failure behavior due to the plastic deformation of the Al liner, leading to improved energy absorption. Specifically, the mean crushing force and crushing force efficiency increased by 57.14 % and 100 %, respectively, compared to pure CFRP tubes, while the peak crushing force decreased by 41.5 % and 22.9 % compared to pure aluminum and CFRP tubes, respectively. FEM analysis reveals that under lateral compression, interface failure in Al/CFRP tubes exhibits significant spatial delay: damage initiates in the diagonal (≈45°) symmetric regions of the tube wall, while delayed failure occurs at the four symmetric positions along the loading and horizontal axes due to the formation of plastic hinges. In the winding composite layers, tensile failure of both fiber and matrix occurs in the outer regions near the non-loaded end, while the inner layers exhibit brittle matrix cracking. Overall, these findings offer valuable insights for the design of lightweight crashworthy structures.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112789"},"PeriodicalIF":12.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144631744","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":"Fire retarded fibre-reinforced composites: Effect of heat and fire on carbon fibre oxidation and resultant properties","authors":"Francesca McKenzie ,&nbsp;Baljinder K. Kandola ,&nbsp;A. Richard Horrocks ,&nbsp;Emmajane Erskine","doi":"10.1016/j.compositesb.2025.112790","DOIUrl":"10.1016/j.compositesb.2025.112790","url":null,"abstract":"<div><div>This study has investigated the impact of fire retardants in carbon fibre-reinforced epoxy composites (CFRC) on physico-mechanical and oxidative properties of carbon fibres after exposure of CFRCs to high temperatures and fire. Three fire retardants were chosen based on their activity in condensed phase (ammonium polyphosphate, APP) and/or vapour phase (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide, DOPO, and resorcinol bis-(diphenyl phosphate), RDP). The composites were subjected to high heat fluxes (75–116 kWm^-2) and fire using a cone calorimeter and propane burner. Post-exposure, the carbon fibres extracted from different plies were analysed for surface oxidation, mass loss, diameter reduction, and changes in tensile and electrical properties. Carbon fibres exhibited differing degrees of oxidation across the plies, with surface ply fibres showing greater oxidation and diameter reductions, while underlying plies experienced limited oxidation due to restricted oxygen access. The charred residues from fire-retarded samples (residue levels: APP &gt; RDP &gt; DOPO &gt; control) adhered to the fibres, reducing oxidation and preserving tensile properties. However, the charred residues increased the electrical conductivity of the carbon fibres. This analysis has enabled the evaluation of each retardant's effectiveness.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112790"},"PeriodicalIF":12.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144605817","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":"Novel cardanol-based polybenzoxazine (PBZ) resins from a sustainable source to substitute phenolic resins in brake pads for eco-friendliness and superior performance","authors":"Bhaskaranand Bhatt ,&nbsp;Umesh Marathe ,&nbsp;Shivani Yadav ,&nbsp;Bimlesh Lochab ,&nbsp;Jayashree Bijwe","doi":"10.1016/j.compositesb.2025.112792","DOIUrl":"10.1016/j.compositesb.2025.112792","url":null,"abstract":"<div><div>The growing demand for sustainable materials with superior performance across diverse applications—such as adhesives, coatings, flame retardants, shape memory polymers, and friction materials (FMs) such as brake pads, shoes, and clutch facings—has elicited significant attention in the transition from petro-based phenolic resins (PPRs) to bio-based alternatives. Despite their ubiquity as matrix materials in friction composites, PPRs are encumbered by three fundamental limitations: storage (limited shelf life and harmful emissions of ammonia and formaldehyde during storage and processing), problems of shrinkage and cracking in final products, and reduced performance when used at high temperatures. These challenges are further exacerbated by the inherent reliance on non-renewable petroleum-based feedstocks. In this work, biowaste cashew nutshell liquid from the cashew industry was used for the first time to synthesize in-house bio-based benzoxazines (BZs). This approach not only advances the circular economy but also mitigates the limitations associated with conventional PPRs in FMs. Four types of brake pads were investigated: three with innovative formulations using 15 vol% variations of BZs, based on distinct functional groups in amine, and one benchmark PPR-based formulation with identical ingredients. Remarkably, the bio-based trisapm BZ formulation exhibited superior tribological (0.36 <span><math><mrow><mrow><mo>(</mo><mi>μ</mi><mo>)</mo></mrow><mo>,</mo><mo>∼</mo></mrow></math></span>94% higher brake fade resistance, and <span><math><mrow><mo>∼</mo></mrow></math></span>36% less wear) and noise-vibration performance (4 dB(A) reduction), demonstrating that changes in monomer design directly influenced the performance, effectively overcoming major bottlenecks associated with PPRs. Beyond processing and performance benefits, these BZs reduced raw material costs and the carbon footprint, offering a scalable, high-performance alternative for conventional resins in FMs.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112792"},"PeriodicalIF":12.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672618","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":"Corrosion resistant hot melt adhesive to bind metals","authors":"Robert L. Sacci ,&nbsp;Lingyao Meng ,&nbsp;Monojoy Goswami ,&nbsp;Christopher C. Bowland ,&nbsp;Jeffrey C. Foster ,&nbsp;Holly E. Humphrey ,&nbsp;Damilola O. Akamo ,&nbsp;Zoriana Demchuk ,&nbsp;Md Anisur Rahman ,&nbsp;Tomonori Saito ,&nbsp;Vera Bocharova","doi":"10.1016/j.compositesb.2025.112793","DOIUrl":"10.1016/j.compositesb.2025.112793","url":null,"abstract":"<div><div>Hot melt adhesives (HMAs) play an important role in many industries, and their demand is expected to grow. HMAs don't require any solvents, and their application results in the formation of strong bonds with the substrate upon cooling within seconds. These properties differentiate them from liquid glues and make them preferable for practical application. Currently, commercial HMAs are used in bonding lightweight materials such as paper, polymers, and cartons, and have limited usage in areas necessitating the bonding of heavier objects like metals. Here, we report a design and testing of versatile platform comprising an ion-coordinating polymer and ionic fillers for performance optimization and understanding of structure–property relationships, enabling the rational design of HMAs with improved adhesion to metal surfaces. All-atom Molecular dynamics (MD) simulations and various characterization methods are used to elucidate the adhesion mechanism in model composite system containing polyethylene oxide mixed with chemically diverse salt particles. The maximum adhesion strength is found in composites with Al(OH)₃ and FeCl₃ fillers. Interestingly, the presence of Al(OH)₃ also provides a multifunctional anticorrosion property as measured electrochemically using the Tafel method. The discovered path to formulations with improved adhesion to metal surfaces constitutes an important step toward advancing HMAs for use in the structural and semi-structural metal work domain.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112793"},"PeriodicalIF":12.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144623341","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":"Additive manufacturing of cryogenic chemically complex alloys with sponge bone-like reticular nanoscale superstructure","authors":"Kaiqiang Xie ,&nbsp;Pan Ma ,&nbsp;Yacheng Fang ,&nbsp;Hong Yang ,&nbsp;Shiguang Wan ,&nbsp;Zhibin Wu ,&nbsp;Jinqiang Shi ,&nbsp;Konda Gokuldoss Prashanth ,&nbsp;Piter Gargarella ,&nbsp;Lunyong Zhang ,&nbsp;Yongkun Mu ,&nbsp;Yandong Jia ,&nbsp;Gang Wang","doi":"10.1016/j.compositesb.2025.112786","DOIUrl":"10.1016/j.compositesb.2025.112786","url":null,"abstract":"<div><div>The mechanical properties of most engineering materials degrade at low temperatures due to increased resistance to dislocation movement in the lattice, hindering stress dissipation via plastic deformation. Consequently, materials are more prone to brittle fracture in stress-concentrated regions rather than exhibiting plastic deformation as seen at room temperature. Herein, we prepared a cryogenic chemically complex alloy (CCA) with a sponge bone-like reticular nanoscale superstructure consisting of L1₂-ordered FCC nanoprecipitates, L2₁-ordered BCC nanoprecipitates, and high-density dislocations via powder bed fusion (PBF) and subsequent aging treatment. The results reveal that appropriate aging induces the formation of a unique nanoscale superstructure, enhancing both structural stability and strength regulation. Microstructural characterization shows the precipitation of coherent L1₂ and incoherent L2₁ nanoprecipitates, which significantly impede dislocation motion and contribute to precipitation strengthening. Among the tested conditions, the sample aged for 2 h exhibits the most balanced mechanical properties, with a yield strength of 1130 MPa, ultimate tensile strength of 1492 MPa, and elongation of 18 % at room temperature. At 77 K, the yield strength and UTS further increase to 1331 MPa and 1786 MPa, respectively, while maintaining a comparable elongation of 17.7 %. Mechanism analysis indicates that deformation at room temperature is dominated by dislocation glide, while at cryogenic temperature, a combination of dislocation–precipitate interactions and nanotwin formation enhances the strength–ductility synergy. Quantitative analysis suggests that L1₂ precipitation contributes approximately 447 MPa to the total strength, accounting for ∼40 % of the strengthening effect. These findings provide valuable insights into microstructure–property relationships in HEAs and offer a promising route toward designing high-performance materials for extreme service environments via additive manufacturing.</div></div>","PeriodicalId":10660,"journal":{"name":"Composites Part B: Engineering","volume":"306 ","pages":"Article 112786"},"PeriodicalIF":12.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611660","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}