Smart Materials in Manufacturing最新文献_第2页

Development and evaluation of urea formaldehyde resin-modified poly(vinyl alcohol)-based biocomposites reinforced with Corchorus olitorius cellulose microfiber 松茸纤维素微纤维增强脲醛树脂改性聚乙烯醇基生物复合材料的研制与评价

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100074

Shahin Sultana , Zahidul Islam , Md Khabir Uddin Sarker , Shamima Akther Eti , Swapan Kumer Ray , Mohammad Majedul Haque , Samia Tabassum

{"title":"Development and evaluation of urea formaldehyde resin-modified poly(vinyl alcohol)-based biocomposites reinforced with Corchorus olitorius cellulose microfiber","authors":"Shahin Sultana , Zahidul Islam , Md Khabir Uddin Sarker , Shamima Akther Eti , Swapan Kumer Ray , Mohammad Majedul Haque , Samia Tabassum","doi":"10.1016/j.smmf.2025.100074","DOIUrl":"10.1016/j.smmf.2025.100074","url":null,"abstract":"<div><div>This study aimed to investigate the effects of thermosetting urea formaldehyde (UF) resin on thermoplastic poly (vinyl alcohol) (PVA) biocomposites. Cellulose microfiber (CMF) was prepared from the extracted cellulose of jute fibers (<em>Corchorus olitorius)</em> using a mechanical ball milling technique, and the resulting material was used as a reinforcing ingredient to produce biocomposites. CMF was characterized by attenuated total reflection-Fourier transform infrared (ATR-FTIR), particle size measurement, and scanning electron microscopy (SEM). Biodegradable PVA-based sustainable green biocomposites were prepared with different CMF loadings (0%–10 % in weight) by the solution casting technique. UF resins with seven different wt% (ranging from 0.5 % to 10 %) were added to thermoplastic PVA to enhance the interpenetrating polymer networks (IPNs) of UF-PVA sheets via the casting technique. Furthermore, seven different wt% of CMF and UF (ranging from 0.5 % to 10 %) were mixed with PVA to produce CMF-UF-PVA biocomposites. Thermogravimetric analysis (TGA), SEM, ATR-FTIR, and tensile property investigations were conducted to characterize the products. The effectiveness of UF in the biocomposites was evaluated through the comparative characterization of neat PVA and UF-PVA, CMF-PVA, and CMF-UF-PVA biocomposites. The results indicate that the tensile strength of the biocomposites produced from 1 wt% UF, 1 wt% CMF, and 98 wt% PVA significantly improved by 118 % compared to the neat PVA matrix and all other biocomposites. Additionally, the biodegradability test results indicate that the CMF-UF-PVA biocomposite is more biodegradable than neat PVA. Therefore, compared to neat PVA, the CMF-UF-PVA biocomposite is more environmentally beneficial and sustainable.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100074"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143510940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Stable waterborne epoxy resins: Impact of toughening agents on coating properties 稳定性水性环氧树脂：增韧剂对涂层性能的影响

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100079

Yongshan Zhao , Hao Zhang , Xingzhu Zhu , Mengtong Wang , Duowei Shen , Changqing Fu , Jun Ma

{"title":"Stable waterborne epoxy resins: Impact of toughening agents on coating properties","authors":"Yongshan Zhao , Hao Zhang , Xingzhu Zhu , Mengtong Wang , Duowei Shen , Changqing Fu , Jun Ma","doi":"10.1016/j.smmf.2025.100079","DOIUrl":"10.1016/j.smmf.2025.100079","url":null,"abstract":"<div><div>Waterborne epoxy coatings are extensively utilized. However, traditional bisphenol A-based formulations are prone to chalking and cracking in low-temperature, high-humidity conditions, which undermines their protective qualities. To address the limitations, this study first synthesized a series of cyclic long-chain dicarboxylic acid compounds (CAs), which were used to replace bisphenol A (BPA), to develop two groups of waterborne epoxy resins. The CE waterborne epoxy resins (CEs) were prepared by completely replacing BPA with CAs in reactions with liquid epoxy resin. The CEB waterborne epoxy resins (CEBs) were synthesized through blending CA-4 with BPA at controlled ratios, followed by reaction with liquid epoxy resin. The research examined how the chain length in each CA influenced the properties of the resins, films and coatings. The findings revealed that all CAs effectively made the coatings ductile. Among the tested samples, the CE-4 film showed an elongation at break of 193 %, and its epoxy primer demonstrated excellent flexibility, passing a 1 mm cylindrical mandrel test without cracking. Furthermore, the epoxy varnishes formed transparent, continuous films at 5 °C. CA-4 significantly balanced the mechanical properties and durability of the CEB coatings, e.g. tensile strength 23.3 MPa and elongation at break 156 % for the CEB-80 film. At molar ratios of 2:3 and 3:2 of CA-4 to bisphenol A, the coatings not only showcased superior film-forming at 5 °C but also rivaled the salt spray resistance of commercial bisphenol A-based waterborne epoxy coatings.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100079"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional printing of continuous carbon fibre-reinforced polylactic acid 连续碳纤维增强聚乳酸的三维打印

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100099

Enyang Lu , Anyuan Jiao , Wanshun Zhang , Zhen Zhang

{"title":"Three-dimensional printing of continuous carbon fibre-reinforced polylactic acid","authors":"Enyang Lu , Anyuan Jiao , Wanshun Zhang , Zhen Zhang","doi":"10.1016/j.smmf.2025.100099","DOIUrl":"10.1016/j.smmf.2025.100099","url":null,"abstract":"<div><div>This study investigates how key process parameters in material extrusion (MEX, ISO/ASTM 52900) affect the flexural behaviour and interfacial performance of continuous carbon fibre-reinforced polylactic acid (PLA) composites (CFRTPCs). Continuous carbon fibre (CCF) pre-impregnated with vinyl ester resin were coextruded with molten PLA to strengthen fibre–matrix adhesion. Three-point bending tests and scanning electron microscopy (SEM) were employed to assess the effects of printing temperature, layer thickness, and hatch spacing. Reducing the layer thickness and optimising the hatch spacing improved fibre distribution and interlayer bonding, while printing temperature strongly influenced matrix flow and fibre impregnation; 230 °C provided the most favourable balance. Under the optimised conditions (230 °C, 0.3 mm layer thickness, 0.8 mm hatch spacing), the composites achieved 3.4-fold higher flexural strength and 8.1-fold higher modulus relative to neat PLA. SEM revealed cohesive fracture with minimal fibre pull-out, confirming robust interfacial bonding. Within the framework of the MEX welding model, the chosen parameter set expanded the weld-capable window (time above the glass-transition temperature (Tg) and early high-temperature exposure), thereby enhancing interlayer welding and fibre wetting. These findings highlight the importance of process optimisation and indicate that a hybrid thermoplastic–thermoset interphase improves the structural performance of continuous fibre-reinforced thermoplastic composites.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100099"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative analysis of the correlation between dual-deposition parameters and porosity in wire arc additive manufactured Ti-22V-4Al alloys 电弧添加剂制备Ti-22V-4Al合金双沉积参数与孔隙率相关性的定量分析

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100090

Yancen Lu, Yuan Wang, Chi-Ho Ng, Michael Bermingham, Matthew Dargusch

{"title":"Quantitative analysis of the correlation between dual-deposition parameters and porosity in wire arc additive manufactured Ti-22V-4Al alloys","authors":"Yancen Lu, Yuan Wang, Chi-Ho Ng, Michael Bermingham, Matthew Dargusch","doi":"10.1016/j.smmf.2025.100090","DOIUrl":"10.1016/j.smmf.2025.100090","url":null,"abstract":"<div><div>The highly interdependent nature of deposition parameters in wire arc additive manufacturing (WAAM) complicates process optimisation for effective defect mitigation, particularly in controlling porosity formation. This study quantitatively investigates the influence of concurrently varied wire feed speed (WFS) and travel speed (TS) on porosity characteristics in Ti-22V-4Al titanium alloys fabricated by WAAM, with a focus on understanding the interplay of deposition parameters. Quantitative examination of porosity volume, morphology, sphericity, and spatial distribution was conducted leveraging machine learning (ML)-based segmentation, as Mask R-CNN provided more accurate and reliable results than traditional Fiji thresholding, particularly for connected and irregular pores. Synchrotron micro-computed tomography (micro-CT) was employed for its high resolution and efficient processing capabilities. A critical TS threshold of 105.14 mm/min was identified from the developed empirical model, where the relationship between WFS and porosity shifts, whilst the correlation between TS and porosity is influenced by both TS and WFS, highlighting the non-monotonic effect of the dual deposition parameters on porosity. This threshold provides a process-specific reference point for optimising parameter selection in industrial WAAM applications aimed at porosity mitigation. The study also found that porosity exhibits a periodic layer-by-layer distribution pattern, with irregular pores predominantly concentrated at the component's centre, while small gas pores dominate the porosity across all examined samples. The superiority of ML models over traditional methods in porosity analysis was demonstrated in terms of accuracy and consistency. This work provides guidance on the synergistic optimisation of deposition parameters in titanium alloys fabricated via WAAM for porosity mitigation.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100090"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144611706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication and performance assessment of CoCrNi-based medium entropy alloy with silver-coated graphene 镀银石墨烯cocrni基中熵合金的制备及性能评价

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100080

Qing Zhou , Yangyang Ma , Mingda Xie , Zhibin Ye , Zhichao Jiao , Ming Yang , Wenting Ye , Cunhong Yin , Haishan Teng , Xiaojiang Lu , Haifeng Wang

{"title":"Fabrication and performance assessment of CoCrNi-based medium entropy alloy with silver-coated graphene","authors":"Qing Zhou , Yangyang Ma , Mingda Xie , Zhibin Ye , Zhichao Jiao , Ming Yang , Wenting Ye , Cunhong Yin , Haishan Teng , Xiaojiang Lu , Haifeng Wang","doi":"10.1016/j.smmf.2025.100080","DOIUrl":"10.1016/j.smmf.2025.100080","url":null,"abstract":"<div><div>Graphene and its derivatives are widely used to improve the friction performance of metal composite materials. Unfortunately, challenges like uniform graphene dispersion and severe interfacial reactions hinder the development of graphene-reinforced medium entropy composite (MEC). In this work, silver-decorated reduced graphene oxide (rGO) as a reinforcement for CoCrNi MEA was prepared through a one-step chemical reduction method, achieving uniform graphene dispersion and alleviating the severe interfacial reaction. During spark plasma sintering (SPS), minimal graphene decomposition occurred, forming hard Cr<sub>23</sub>C<sub>6</sub> carbides. The friction testing showed that thermal and mechanical stresses facilitated the formation of a self-lubricating layer enriched with rGO and silver on the worn surface, leading to a synergistic effect among various solid lubricants and significantly improving the tribological performance. Under a load of 5 N, the average friction coefficient (COF) of the Ag@rGO/CoCrNi composite was 0.41, a 36.9 % reduction compared to the CoCrNi matrix, while the wear rate decreased by 6.5 %. At 15 N, the COF further reduced to 0.37, a 25.1 % decrease. Microscopic investigation elucidated sub-surface nano twins and FCC-HCP phase transition under high-stress conditions. This work provides a new strategy for graphene dispersion and an approach for fabricating high-performance metal-modified rGO/CoCrNi MECs.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100080"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rare earth orthoferrites (RFeO3, R= rare earth elements): A comprehensive review of structural, dielectric, and magnetic properties 稀土正铁氧体（RFeO3， R=稀土元素）：结构、介电和磁性能的综合综述

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100082

Prafulla Kumar Pradhan , A.B. Panda , G.K. Mishra , N.K. Mohanty

{"title":"Rare earth orthoferrites (RFeO3, R= rare earth elements): A comprehensive review of structural, dielectric, and magnetic properties","authors":"Prafulla Kumar Pradhan , A.B. Panda , G.K. Mishra , N.K. Mohanty","doi":"10.1016/j.smmf.2025.100082","DOIUrl":"10.1016/j.smmf.2025.100082","url":null,"abstract":"<div><div>Rare earth-based orthoferrites perovskite oxides RFeO<sub>3</sub> (R = rare earth ions) have been studied by many researchers across the globe for their potential applications as smart devices due to their interesting properties. The understanding of the different properties of these kinds of materials requires a comprehensive analysis of their structural, dielectric, and magnetic attributes. This review summarizes the structural stability, dielectric, and magnetic properties of rare-earth-based orthoferrites perovskite oxides. It also provides basic knowledge for the synthesis and characterizations of rare-earth-based perovskite oxides by introducing fundamental knowledge to researchers. The study therefore, will help the readers to address the challenges like weak ferromagnetism, complex magnetic interactions, difficulties in precise material synthesis for growing high-quality single crystals, doping strategies for desired applications and temperature-dependent behaviours that limit their room-temperature applications. This tenability unlocks applications across diverse fields, including advanced data storage, sensitive gas sensors, efficient fuel cells, magnetically recoverable catalysts, and innovative magnetic devices, all vital for next-generation smart manufacturing technologies.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100082"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical properties, degradation behavior, and biocompatibility of porous iron scaffold fabricated by laser powder bed fusion 激光粉末床融合制备多孔铁支架的力学性能、降解行为及生物相容性

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100089

Dongdong Li , Xuehua Wu , Yinjin Shao , Guihua Wu , Hejin Yang , Fang Deng , Youwen Yang

{"title":"Mechanical properties, degradation behavior, and biocompatibility of porous iron scaffold fabricated by laser powder bed fusion","authors":"Dongdong Li , Xuehua Wu , Yinjin Shao , Guihua Wu , Hejin Yang , Fang Deng , Youwen Yang","doi":"10.1016/j.smmf.2025.100089","DOIUrl":"10.1016/j.smmf.2025.100089","url":null,"abstract":"<div><div>The design of porous structure can not only improve the degradation rate of iron (Fe) by significantly increasing the specific surface area, but also promote osteogenic differentiation by facilitating nutrient transport and improving cell adhesion. Moreover, biodegradable Fe scaffolds fabricated via laser powder bed fusion (LPBF) present a transformative opportunity to meet the criteria of ideal bone substitutes. This study demonstrates that the optimization of processing parameters and topological design can synergistically enhance Fe scaffolds' performances. By optimizing critical process parameters, near-full densification was achieved. Three topological architectures, namely body-centered cubic (B), diamond (D), and gyroid (G), were manufactured and evaluated for degradation behavior, biomechanical compatibility, and biocompatibility. After 28 days of degradation, all porous scaffolds demonstrated mechanical properties comparable to trabecular bone, effectively mitigating stress shielding risks while maintaining adequate load-bearing capacity. Notably, the G scaffold, which utilized triply periodic minimal surface geometry, exhibited uniform corrosion, progressive failure, and outstanding biocompatibility, achieving over 95 % cell viability in the 50 % extract solution, thus outperforming the B/D scaffolds.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100089"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fatigue properties of 3D-printed polymeric metamaterials: A review 3d打印聚合物超材料的疲劳性能研究进展

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100076

Ani Daniel , Hamed Bakhtiari , Alireza Nouri , Barun K. Das , Muhammad Aamir , Majid Tolouei-Rad

{"title":"Fatigue properties of 3D-printed polymeric metamaterials: A review","authors":"Ani Daniel , Hamed Bakhtiari , Alireza Nouri , Barun K. Das , Muhammad Aamir , Majid Tolouei-Rad","doi":"10.1016/j.smmf.2025.100076","DOIUrl":"10.1016/j.smmf.2025.100076","url":null,"abstract":"<div><div>The present article provides an in-depth review of the fatigue properties of polymeric metamaterials, with particular emphasis on those manufactured using 3D printing techniques. Despite the significant potential of 3D-printed metamaterial polymers in the biomedical field, there has been limited studies dedicated to their fatigue behaviour. The article highlights the significance of fatigue behaviour in determining the reliability and longevity of polymeric materials under cyclic loading, which is crucial for biomedical applications. The effects of different 3D printing parameters, metamaterial designs, and polymer properties on fatigue life are explored. The fatigue response of metamaterials depends on material properties, geometric factors, and 3D printing parameters. Metamaterial geometries with sharp corners and high stress concentration zones have shown to be prone to early fatigue failure. Besides, thermal fatigue can contribute to fatigue damage of metamaterials particularly at high loading frequencies. Optimising designs for smooth geometries and considering thermal conductivity in polymers are crucial for enhancing fatigue resistance and durability in 3D printed metamaterials. The review emphasises the role of advanced computational modelling, combined with experimental studies, in optimising metamaterial design and manufacturing processes of polymers. The goal is to enhance fatigue resistance and expand their applications, particularly in the biomedical field.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100076"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143562342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

From fabrication to function: Mechanical insights into GelMA microneedle arrays 从制造到功能：对GelMA微针阵列的机械见解

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100083

Moloud Amini Baghbadorani , Masoumeh Zargar , Asghar Eskandarinia , Majid Tolouei-Rad

引用次数: 0

Laser directed energy deposition of TA15/TiAl bimetallic structure: laser power optimization, microstructure evolution and mechanical performance 激光定向能沉积TA15/TiAl双金属结构：激光功率优化、微观结构演变及力学性能

Smart Materials in Manufacturing Pub Date : 2025-01-01 DOI: 10.1016/j.smmf.2025.100087

Qing Liang , Leyu Cai , Qingge Wang , Yafei Wang , Xiaopeng Liang , Quan Shan , Hong Wu

{"title":"Laser directed energy deposition of TA15/TiAl bimetallic structure: laser power optimization, microstructure evolution and mechanical performance","authors":"Qing Liang , Leyu Cai , Qingge Wang , Yafei Wang , Xiaopeng Liang , Quan Shan , Hong Wu","doi":"10.1016/j.smmf.2025.100087","DOIUrl":"10.1016/j.smmf.2025.100087","url":null,"abstract":"<div><div>This study explores the fabrication of crack-free TA15/TiAl bimetallic structures prepared by laser directed energy deposition (LDED) for high-temperature applications. By employing laser power (800−1600 W) for S1–S5 (1600, 1400, 1200, 1000, 800 W, respectively), defect-free interfaces were achieved, with sample S2 (1400 W) exhibiting the lowest porosity (0.19 %) and finest microstructure. The transition zone exhibited a composition gradient of Al/Ti, driven by atomic diffusion and Marangoni convection, resulting in a heterogeneous multi-gradient structure. Notably, the uniform distribution of FCC phase in the transition zone reduced stress concentration from Al<sub>3</sub>Ti hard phase, while the absence of cracks and lack-of-fusion defects confirmed robust metallurgical bonding. Room-temperature tensile tests showed that sample S2 fractured near the TiAl side, achieving an ultimate tensile strength of 780 ± 25 MPa and elongation of 1.41 ± 0.11 %, attributed to stress redistribution facilitated by ductile α-Ti and gradient strain accommodation. These findings demonstrated that LDED-fabricated TA15/TiAl bimetallic composites exhibited enhanced interfacial strength and thermal stability, promising for aerospace components in extreme environments.</div></div>","PeriodicalId":101164,"journal":{"name":"Smart Materials in Manufacturing","volume":"3 ","pages":"Article 100087"},"PeriodicalIF":0.0,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144502733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0