Advanced Engineering Materials最新文献

{"title":"Improved Antibacterial Properties of Additively Manufactured Ti–6Al–4V Surface Machined by Wire Electro-Discharge Machining","authors":"Salikh Omarov,&nbsp;Nurlan Nauryz,&nbsp;Shahid Ali,&nbsp;Ainur Kenessova,&nbsp;Tri Pham,&nbsp;Didier Talamona,&nbsp;Asma Perveen","doi":"10.1002/adem.202402147","DOIUrl":"https://doi.org/10.1002/adem.202402147","url":null,"abstract":"<p>Titanium alloys are the most demanded material type in implant applications. However, developing bacteria-resistant implant characteristics is still in the progress of the research field. In this study, the performance of micro-wire electro-discharge machining (μ-WEDM) surface modification technique on Ti–6Al–4V alloy is investigated. The performance parameters such as material removal rate, kerf width, surface roughness, and crater size are evaluated in terms of capacitance and gap-voltage input parameters. In addition, the adhesion of bacteria such as <i>Staphylococcus aureus</i>, <i>Pseudomonas aeruginosa</i>, <i>Escherichia coli</i>, and <i>Bacillus subtilis</i> on treated surfaces is tested. Results show that the difference in discharge energy affects surface biofilm prevention performance. According to that, <i>Pseudomonas aeruginosa</i>, <i>Escherichia coli</i>, and <i>Bacillus subtilis</i> attach more on surfaces with 0.727 μm roughness which are machined with 10 nF and 100 V. <i>Staphylococcus aureus</i> attaches more on surfaces with 0.211 μm roughness machined with 1 nF and 90 V. Meanwhile, surface with 1.531 μm roughness, machined with 100 nF and 110 V, provides the least number of bacteria attached to the surface for all strains except <i>Bacillus subtilis</i>. In conclusion, this study found that μ-WEDM surface treatment techniques can increase biofilm prevention properties of implant surfaces for different bacteria strains, within a certain range of discharge energy.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801763","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}

{"title":"Investigation on the Anisotropic Electrothermal Performance of Wood-Based Graphene Electric Heating Composites","authors":"Wen Qu,&nbsp;Xiaoyu Feng,&nbsp;Bo Guan,&nbsp;Siman Zhou,&nbsp;Xu Tang,&nbsp;Jipeng Ge,&nbsp;Mengjiao Shi,&nbsp;Chunmei Yang","doi":"10.1002/adem.202402587","DOIUrl":"https://doi.org/10.1002/adem.202402587","url":null,"abstract":"<p>The unique material structure and pronounced anisotropy of wood bestow it with an array of remarkable properties, creating opportunities for designing functional materials. This study investigates the application of wood's anisotropic structure in temperature-controlled intelligent electric heating materials by preparing wood-based graphene electric heating composites (GNPs@EW). Graphene nanosheets (GNPs) are incorporated into a birch matrix (EW) to enhance the electrical and thermal conductivity of insulating wood. The integration of graphene with wood is confirmed through Fourier transform infrared spectrometer (FTIR) and X-ray diffractometer (XRD) analysis. The optimal composite (GNPs@EW₁) is prepared with graphene-to-anhydrous ethanol mass ratio of 1:1. The results demonstrate the influence of wood's anisotropy on the electrical and thermal conductivity of the composites, revealing superior performance in the axial direction compared to the tangential direction. The resistivity of GNPs@EW₁ along the axial direction decreases by 2.1–2.9 times relative to the tangential direction, and the temperature rise after energization at 6 V is 22–29 °C higher in the axial direction. Furthermore, GNPs@EW₁ exhibits thermal stability, enhanced axial mechanical properties, and temperature uniformity, establishing these superior axial properties as a foundation for the development of wood-based heating materials and innovative smart heating applications.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 7","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143801683","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}

{"title":"Enhanced Mechanical Properties of a CoCrNi Alloy with a Gradient Dislocation Structure","authors":"Yiru Peng,&nbsp;Jiangjie Liao,&nbsp;Mian Chen,&nbsp;Pengcheng Ma,&nbsp;Jing Qiu,&nbsp;Yu Liu,&nbsp;Yaoyao Yu,&nbsp;Jian Hu","doi":"10.1002/adem.202402450","DOIUrl":"https://doi.org/10.1002/adem.202402450","url":null,"abstract":"<p>Herein, a gradient dislocation structure (GDS) with a thickness of about 600 μm is fabricated on the surface of a CoCrNi medium entropy alloy (MEA) using surface mechanical rolling treatment. With increasing depth, the dislocation density of the GDS sample decreases, while the grain size shows no significant refinement except for the topmost layer. The strength of the GDS sample exhibits a pronounced increase while maintaining decent elongation (about 40%) and work-hardening ability, which can be attributed to the numerous dislocation tangles and networks stabilized by the nanoscale chemical short-range ordered structure dispersed in the CoCrNi MEA. The stable dislocation tangles and networks are effective in resisting dislocation motion, thereby contributing to continuous hardening upon strain. These findings provide a promising approach to achieving exceptional strength-ductility synergy in MEA and expanding their potential applications in engineering.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535841","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}

{"title":"Multimaterial Bonding of Additively Manufactured Carbon Fiber-Reinforced Thermoplastics/64 Titanium","authors":"Keiichi Shirasu,&nbsp;Takeru Mizuno,&nbsp;Hironori Tohmyoh","doi":"10.1002/adem.202402221","DOIUrl":"https://doi.org/10.1002/adem.202402221","url":null,"abstract":"<p>\u0000The integration of lightweight materials in hybrid structures is critical for achieving energy efficiency in automotive and aerospace industries. This study presents a novel method for directly bonding carbon-fiber-reinforced thermoplastics to Ti6Al4V titanium alloy (64Ti) substrates using fused filament fabrication 3D printing. The technique involves 3D printing short carbon fiber-reinforced polyamide 6 onto sandblasted 64Ti substrates, heated via a hot plate integrated into the 3D printer. Lap-shear tests reveal that adhesion strength improves with increased fusion time, achieving a maximum shear stress of 27.3 ± 2.2 MPa for 60 min welding. Finite element analysis demonstrates stress concentrations at the adhesion edges and highlights the formation of a fracture process zone with localized plastic deformation and microcrack generation. Additionally, the feasibility of fabricating 3D structures and integrating continuous carbon fiber-reinforced thermoplastics onto 64Ti substrates is demonstrated. This study advances hybrid material joining techniques by providing a cost-effective, scalable method for achieving robust metal-composite bonds suitable for structural applications.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202402221","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143535842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reactive Multilayers, Their Design and Their Applications: Bonding, Debonding, Repair, Recycle","authors":"Anne Jung,&nbsp;Christoph Pauly,&nbsp;Peter Schaaf","doi":"10.1002/adem.202402295","DOIUrl":"https://doi.org/10.1002/adem.202402295","url":null,"abstract":"&lt;p&gt;While the redox-reaction-based thermite mixtures for exothermic reactions are well-known since a long time, systematic research on non-thermite reactive materials dates back to the 1960s in the USSR when Merzhanov and Borovinskaya did groundbreaking work on powder-based transition metal/carbon mixtures. Since then, the class of ingredients has widened to include metal/metal mixtures and with the progress in physical vapor deposition, precise nanoscale layering of the reactant has become possible. These reactive multilayer systems (RMS), comprising up to several hundred repetitions of individual layers, reach total film thicknesses of up to several tens of micrometers. The characteristic of these films is their capability of undergoing self-propagating exothermic reactions at up to ≈100 m/s and 2000 °C and more. Thermodynamics, reaction kinetics as well as thermal and chemical diffusion set the boundary conditions defining the reaction properties, thus providing means for reaction design.&lt;/p&gt;&lt;p&gt;The application of such self-propagating reactions is of great technological interest, e.g. for the joining of electronic components in electronics, the debonding of parts or even a repair of failure parts. However, the self-propagating reaction after multilayer ignition is hard to control in real technical systems. While the influence of the most prominent parameter, the bilayer thickness, has been studied extensively for various material combinations, many open questions exist regarding the effect of factors like surfaces, materials properties, roughness, morphology, thermo-mechanical stress, structuring or combined systems.&lt;/p&gt;&lt;p&gt;This special issue contains the latest research on such reactive multilayer systems based on Ni/Al and Ru/Al, the current understanding and their applications. The articles investigate the impact of the morphological characteristics and physical properties of the joining partners on the microstructural features of the fabricated RMS, as well as the role of thermophysical properties of the system and the kinetics of the reaction. The vision is the design of a “suitable” microjoining process with fitting electrical and thermal properties of a high-quality mechanical joining &lt;b&gt;Figure&lt;/b&gt; 1.&lt;/p&gt;&lt;p&gt;Means to manipulate and tailor the reaction are explored for both improving the understanding of fundamental mechanisms as well as for application on a system level. Different approaches for multilayer modification by substrate patterning are investigated, i.e. photolithography, deep etching and direct laser interference patterning. The resulting structure shows more or less strong deviations from the well-known planar multilayer structure when depositing on flat substrates, like curved layers, pores and discontinuities, which unfold their effect on the scale of up to a few bilayers. Their effects on the self-propagating reactions are discussed with respect to thermal and chemical diffusivity and interface mixing. These modifications o","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 3","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202402295","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tailoring the Reaction Path: External Crack Initiation in Reactive Al/Ni Multilayers","authors":"Sebastian Matthes,&nbsp;Marcus Glaser,&nbsp;Emina Vardo,&nbsp;Yesenia Haydee Sauni Camposano,&nbsp;Konrad Jaekel,&nbsp;Jean Pierre Bergmann,&nbsp;Peter Schaaf","doi":"10.1002/adem.202570009","DOIUrl":"https://doi.org/10.1002/adem.202570009","url":null,"abstract":"<p><b>Reactive Al/Ni Multilayers</b>\u0000 </p><p>The image depicts a reactive multilayer system (RMS) envisioned for future chip-bonding applications. Individual layers of aluminum (Al) and nickel (Ni) are activated by a brief energy pulse, initiating a diffusion-driven reaction that reaches peak temperatures up to 1500 °C. In the course of this self-sustaining high-temperature synthesis, the two face-centered cubic metals transform into a body-centered cubic AlNi B2 phase. Further details can be found in article number 2302271 by Sebastian Matthes and co-workers.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 3","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202570009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of Sample Preparation Approach on Transmission Electron Microscopy Investigation of Sputtered AlNi Multilayers Used for Reactive Soldering","authors":"Juan Jesús Jiménez,&nbsp;Konrad Jaekel,&nbsp;Christoph Pauly,&nbsp;Christian Schäfer,&nbsp;Heike Bartsch,&nbsp;Frank Mücklich,&nbsp;Francisco Miguel Morales","doi":"10.1002/adem.202570011","DOIUrl":"https://doi.org/10.1002/adem.202570011","url":null,"abstract":"<p><b>Sputtered AlNi Multilayers</b>\u0000 </p><p>In article number 2302215, Juan Jesús Jiménez and co-workers show that preparation methods have crucial influence on transmission electron microscopy results when investigating the intermixing between Al and Ni in reactive multilayers. The comparison of three lamella preparation methods shows that Xe-based FIB leads to low contamination, although Ga-FIB is a good alternative. This outcome presents an important aspect for the investigation of self-sustaining reactions on nanostructures and rough surfaces.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 3","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adem.202570011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143111732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancement of Strength and Hardness in Copper–Chromium–Zirconium Alloy Using Single-Pass Multi-Angular Twist Channel Extrusion: A Microstructural and Deformation Study","authors":"Swaminathan Muralidharan,&nbsp;Usuff Mohammed Iqbal","doi":"10.1002/adem.202402218","DOIUrl":"https://doi.org/10.1002/adem.202402218","url":null,"abstract":"<p>Herein, the strength and hardness of copper–chromium–zirconium alloy are enhanced in a single pass by a severe plastic deformation (SPD) technique called the multiangular twist channel extrusion (MATE) process. In equal channel angular pressing (ECAP) and twist extrusion (TE), requisite strain and uniformity are achieved through several extrusion passes. MATE is a single-pass novel SPD technique developed by integrating TE with the ECAP followed by a direct channel zone. The deformation behavior of metal in the MATE process is elucidated through experimental and microstructural studies conducted in each zone. The MATE-processed Cu–Cr–Zr alloy achieves a hardness of 184.4 Hv and a tensile strength of 645.2 MPa, reflecting an increase of 80.43% and 69.7%, respectively, relative to the annealed condition. The electrical conductivity of the MATE-processed Cu–Cr–Zr alloy decreases to 74.29% International Annealed Copper Standard. The electron backscatter diffraction investigation reveals an average grain size of 2.8 μm, with 61% comprising low-angle grain boundaries, while the calculated dislocation density, from X-ray diffraction analysis, is 3.93 × 1014 m⁻². The transmission electron microscopy image verifies the existence of dislocations and precipitates in the Cu–Cr–Zr alloy. The experimental and microstructural findings in each zone have aligned effectively.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533433","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}

{"title":"Ionic Liquids-Based Reconfigurable Frequency Selective Rasorber with Thermally Tunable Absorption Band","authors":"Fulong Yang,&nbsp;Dayu Wang,&nbsp;Xiaoqing Zhu,&nbsp;Huan Xu,&nbsp;Teng Wang,&nbsp;Zhinan Shi","doi":"10.1002/adem.202401421","DOIUrl":"https://doi.org/10.1002/adem.202401421","url":null,"abstract":"<p>This article proposes a novel ionic liquids-based reconfigurable frequency selective rasorber (FSR) at microwave bands. The ionic liquids-based FSR consists of a bandpass-type frequency-selective surface, a 3D resin container, and an ionic liquid layer. Numerical simulation analysis demonstrates that the transmission loss of the FSR is less than 3 dB within the range of 4.3–5.3 GHz, and the absorption rate exceeds 90% within the range of 8–27.5 GHz. The FSR exhibits reconfigurable characteristics: when the cavity is filled with the ionic liquid [EMIm][N(CN)₂], it demonstrates low-frequency transmission and high-frequency absorption. In contrast, when no ionic liquid [EMIm][N(CN)₂] is in the cavity, it exhibits low-frequency transmission. The proposed ionic liquids-based FSR also has a wide incidence angle with polarization-insensitive characteristics. By studying the electromagnetic characteristics of frequency-selective rasorbers at different temperatures, it is found that the frequency-selective rasorber has a stable passband at low frequencies and the absorption bandwidth decreases with increasing temperature at high frequencies. Finally, a prototype of the FSR based on ionic liquid has been fabricated, and the experimental results are presented to demonstrate the validity of the proposed structure, indicating potential applications in antenna stealth technology.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143533432","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}

{"title":"Enhancing Stress Corrosion Cracking Resistance in a High Alloying Al–Zn–Mg–Cu Alloy by Controlling Recrystallization Morphology","authors":"Mingyang Yu,&nbsp;Xiwu Li,&nbsp;Kai Wen,&nbsp;Kai Zhu,&nbsp;Guohui Shi,&nbsp;Yongan Zhang,&nbsp;Zhihui Li,&nbsp;Baiqing Xiong","doi":"10.1002/adem.202402373","DOIUrl":"https://doi.org/10.1002/adem.202402373","url":null,"abstract":"<p>Al–Zn–Mg–Cu alloys are widely used in aerospace, with recrystallization significantly influencing their stress corrosion resistance. This study examines the impact of recrystallization morphology on corrosion resistance in a high-alloying Al–Zn–Mg–Cu alloy, focusing on lath-shaped and equiaxed recrystallized grains. The findings reveal that, at the same recrystallization fraction, the equiaxed sample has a 2.83 times higher corrosion current density and a 1.15 times higher stress corrosion cracking susceptibility index than the lath sample. However, its critical stress intensity factor is only 89.3% of the lath alloy's. Lath recrystallization demonstrates superior stress corrosion resistance due to larger grain sizes, wider grain boundary precipitate spacing, lower Zn and Mg content, and higher Cu content. Finite element simulations and in-situ tensile tests show that the equiaxed sample experiences more stress concentration and cracking at grain boundaries under the same applied stress. These results provide insights into optimizing the stress corrosion resistance of Al–Zn–Mg–Cu alloys.</p>","PeriodicalId":7275,"journal":{"name":"Advanced Engineering Materials","volume":"27 5","pages":""},"PeriodicalIF":3.4,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143536088","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}