Institut für Werkstofftechnik IfW (Universität Kassel)’s Post

📢 Exciting News! Check out our latest articles accepted for publication in the journal 'Additive Manufacturing'. This research focuses on the impact of microstructural heterogeneities on the creep behavior of additively manufactured γ'-forming Ni-based alloys. Manuscript 1 investigates structure-property relationships through experiments, while Manuscript 2 explores these relationships further with simulations. 1️⃣ The Influence of Microstructural Heterogeneities on High-Temperature Mechanical Properties of Additively Manufactured γ'-forming Ni-based alloys 🔗 https://lnkd.in/eWAngSHf 2️⃣ Understanding the High-Temperature Deformation Behavior of Additively Manufactured γ'-forming Ni-based alloys by Microstructure Heterogeneities-Integrated Creep Modelling 🔗 https://lnkd.in/e-JRUGMt The work is a collaboration between: Steel Institute at RWTH Aachen University (Venkatesh Pandian, Betül Bezci, Ulrich Krupp), Digital Additive Production DAP - RWTH Aachen (Bhupesh Verma, Johannes Henrich Schleifenbaum), QuesTek Europe AB (Fuyao Yan, Ida S. Berglund), Institute of Physics of Materials, Czech Academy of Sciences, v. v. i. (Ivo Šulák, Zdeněk Chlup, Tomáš Záležák ), VDM Metals International GmbH (Benedikt Nowak), Chair Materials for Additive Manufacturing at Technical University of Berlin (Frederike Brasche, Christian Haase). Further, the research is supported by the European Union’s Horizon 2020 research and innovation program (grant agreement No 958192) and the German Federal Ministry of Education and Research within the NanoMatFutur project “MatAM - Design of additively manufactured high-performance alloys for automotive applications” (project ID 03XP0264). Stay tuned for more updates from the Steel Institute at RWTH Aachen University! #Research #AdditiveManufacturing #NickelAlloys #CreepBehavior #MaterialScience #Horizon2020 #NanoMatFutur #HighPerformanceAlloys

🚀 Exciting News! We're thrilled to share our latest publication in Scripta Materialia: "Silicon Mediated Twin Formation in Laser Direct Energy Deposited 316L Stainless Steel". Link to open access article: https://lnkd.in/epUSXXQq In this study, eminating from the post-doctoral work of Dr. Kewei Chen, we demonstrate how increasing the silicon (Si) content in 316L stainless steel can significantly enhance the formation of Σ3 twin boundaries during laser-based directed energy deposition, an additive manufacturing technique; these "special" boundaries are known for their resistance to intergranular corrosion and improving stress corrosion cracking resistance. Increasing Si content from 0.7wt% to 2.2wt% resulted in an increase in the length fraction of Σ3 twin boundaries from 2.25% to a whopping 23% . (===> Click on the picture to view it with a better resolution) We explain how this increase in length fraction is promoted via the occurence of two microstructure formation mechanisms in 316L with 2.2wt% Si: (i) an ISRO-mediated nucleation of grains in the liquid state and (ii) massive transformation of ferrite to austenite (F/MA) in the solid state. In a broader context, this work underlines how standard alloy compositions can be altered to yield significant and desirable microstructural changes during additive manufacturing. This research has been supported by my European Research Council (ERC) Starting Grant project GAMMA (946959) and conducted at the LMS, École Polytechnique, Institut Polytechnique de Paris, CNRS UMR 7649. #3Dprinting #additivemanufacturing #stainlesssteels #316L #research #alloying #silicon #DED

📢 #specialissue #CallforPapers CMC-Computers, Materials & Continua new special issue“Optimization Design for Material Microstructures”is open for submission now. 📆 Submission Deadline:    31 December 2024 👨🎓 Guest Editors Prof. Hao Li, Huazhong University of Science and Technology, China Prof. Yiqiang Wang, Dalian University of Technology, China Prof. Jikai Liu, Shandong University, China Dr. Ying Zhou, Huazhong University of Science and Technology, China 📝 This special issue is dedicated to exploring the latest developments and applications in the field of Optimization Design for Material Microstructures. Material microstructure optimization plays a crucial role in tailoring material properties to meet specific performance requirements across various domains, including mechanical engineering, materials science, and nanotechnology. 📚 For submission guidelines and details, visit: https://lnkd.in/dvnpUdcq #TopologicalOptimization, #Metamaterials, #MultifunctionalMaterials, #MaterialStructureIntegration, #MultiscaleDesign, #AdditiveManufacturing

🔬 Breaking New Ground! 🔬 I'm delighted to announce that my latest research article is available online which will be published in the special issue "New Metamaterials and Devices" of the journal Materials & Design (JUFO-3) ! 🎉 📝 Title: Characterization of Hydrophobic Metasurfaces Fabricated on Ni-Mn-Ga-Based Alloys Using Femtosecond Pulsed Laser Ablation 🔍 Highlights: For the first time, the prospect of producing hydrophobic surfaces on Ni-Mn-Ga-based alloys was evaluated. A novel multi-stage process was introduced for creating hydrophobic surfaces. Potential for generating metasurfaces with controllable hydrophobicity using shape memory function was explored. I would like to extend my heartfelt gratitude to my supervisors, Ville Laitinen, for his active support, and Kari Ullakko, for the research freedom and resources provided. 🙏 For more details, check out the full article: https://lnkd.in/dGrMYY2S #Research #Metasurfaces #Metamaterials #HydrophobicSurfaces #LaserAblation #MaterialsDesign #Microfluidics #Science #Innovation

💡Explore our latest publication in #Advanced Engineering Materials! 🔬 Thor et al., Microstructure Characterization and Mechanical Properties of Polymer-Derived (HfxTa1-x)C/SiC Ceramics Prepared upon Field-Assisted Sintering Technique/Spark Plasma Sintering 📑✨ In this work we present a comprehensive study of the macro- and microstructural evolution, starting from the as-pyrolyzed powders into the consolidated (HfxTa1−x)C/SiC PDCs. Moreover, we employed high-throughput nanoindentation and statistical analysis to accurately determine the hardness and Young's modulus of the constituent microstructural regions within the bulk samples. The obtained results offer valuable insights into the underlying mechanisms governing the microstructural evolution of these advanced ceramic materials, providing critical information for the design and development of high-performance materials for demanding applications. ✨🚀 This work was created in collaboration with great colleagues from Technische Universität Darmstadt, DECHEMA Forschungsinstitut, Karlsruher Institut für Technologie (KIT), RWTH Aachen University, Forschungszentrum Jülich, and Justus-Liebig-Universität Giessen. 💥 Thanks to all the contributors: Georg Winkens, Nils-Christian Petry, Jan Bernauer, Katharina Beck, Ruth Schwaiger, Ralf Riedel, @Ute Kolb, Maren Lepple and Astrid Pundt. 🙌 Funding: We greatly acknowledge the Deutsche Forschungsgemeinschaft (DFG) - German Research Foundation for financial support in our Research Training Program „MatCom-ComMat: Materials Compounds for Composite Materials for Applications in Extreme Conditions” 🚀 🧡 🔗Find the the link to the full article in the comments below.🔗

𝐄𝐱𝐩𝐥𝐨𝐫𝐢𝐧𝐠 𝐭𝐡𝐞 𝐈𝐦𝐩𝐚𝐜𝐭 𝐨𝐟 𝐓𝐢𝐎𝟐 𝐚𝐧𝐝 𝐌𝐠𝐎 𝐍𝐚𝐧𝐨𝐩𝐚𝐫𝐭𝐢𝐜𝐥𝐞𝐬 𝐨𝐧 𝐭𝐡𝐞 𝐌𝐞𝐜𝐡𝐚𝐧𝐢𝐜𝐚𝐥 𝐚𝐧𝐝 𝐓𝐨𝐩𝐨𝐠𝐫𝐚𝐩𝐡𝐢𝐜𝐚𝐥 𝐂𝐡𝐚𝐫𝐚𝐜𝐭𝐞𝐫𝐢𝐬𝐭𝐢𝐜𝐬 𝐨𝐟 𝐆𝐥𝐚𝐬𝐬 𝐅𝐢𝐛𝐞𝐫 𝐑𝐞𝐢𝐧𝐟𝐨𝐫𝐜𝐞𝐝 𝐏𝐨𝐥𝐲𝐦𝐞𝐫 (𝐆𝐅𝐑𝐏) 𝐂𝐨𝐦𝐩𝐨𝐬𝐢𝐭𝐞𝐬 𝐰𝐢𝐭𝐡 𝐕𝐚𝐫𝐢𝐞𝐝 𝐋𝐚𝐲-𝐮𝐩 𝐒𝐞𝐪𝐮𝐞𝐧𝐜𝐞𝐬: 𝐀 𝐓𝐚𝐠𝐮𝐜𝐡𝐢 𝐀𝐧𝐚𝐥𝐲𝐬𝐢𝐬 A revolutionary composite material, blending Glass Fiber Reinforced Polymer (GFRP) with advanced nanofillers like TiO2 and MgO, showcases remarkable versatility in various industries due to its unique properties. The process involves precise control of key factors, including fiber stacking sequence (F.S.S) and nanofiller integration (MgO and TiO2). The vacuum bagging process is employed in the production of nanocomposite laminates. Experimental studies have been conducted to assess the performance of composites with and without nanofillers, with a specific focus on crucial mechanical properties, namely ultimate tensile strength (U.T.S), flexural strength (F.S), impact strength (I.S), and hardness (H). The Taguchi L9 orthogonal array design optimizes parameters and enhances mechanical properties. Comparisons reveal significant improvements with nanofillers, including a 31.96% increase in ultimate tensile strength and a substantial 68.43% enhancement in flexural strength. ANOVA results highlight the critical impact of fiber stacking sequence on ultimate tensile strength (63.65%), flexural strength (65.70%), and impact strength (9.30%), while nanofillers play a lesser role, contributing 11.71% to ultimate tensile strength, 2.66% to flexural strength, and 3.61% to impact strength. Notably, in composite hardness, nanofillers play a more significant role, contributing 39.22%, while the influence of fiber stacking sequence is lower at 3.29%. #ultimatetensilestrength #flexuralstrength #impactstrength #hardness #IRJMT #ARA #Research #MaterialScience #Innovation #Journal #Publication #Scopus #OpenAcess #Environment #Engineering #Scientific #Science #Study #Rearchanddevelopment Asian Research Association Read more https://lnkd.in/gG2V4byb For more information, please read our recent articles at https://lnkd.in/gqaMY-sW

🌟 Exploring Auxetic Materials: A Major Scientific Breakthrough 🌟 Auxetic materials are characterized by their negative Poisson's ratio, meaning they expand perpendicularly when subjected to tensile stress. This unique property makes them particularly intriguing for various applications in engineering and materials science. 🔍 Key Properties: Auxetic Deformation: Unlike conventional materials, auxetic materials increase in volume when stretched. Impact Resistance: Their structure allows for efficient energy absorption, making them ideal for demanding environments. Damping and Filtration: Excellent vibration attenuation capabilities, useful in developing absorptive elements. 🏗️ Application Areas: Medical: Utilized in implants and medical devices, providing better adaptation to surrounding tissues. Textiles: Development of functional textiles that adapt to body movements. Aerospace and Automotive: Integration into lightweight, durable components, contributing to weight reduction and performance enhancement. Sports: Creation of high-performance equipment that optimizes comfort and support. The exploration of auxetic materials opens new avenues for innovation. I would love to exchange thoughts and experiences regarding these promising materials! #AuxeticMaterials #NegativePoissonsRatio #TechnologicalInnovation #Engineering #MaterialsEngineering #scaffolds #3DPrinting #Bioengineering #BoneScaffolds

Our paper titled "Microstructural Characterization of In-situ MgAl2O4 Nanoparticles Reinforced Al–2Mg–1Si Composite Produced Using the Ultrasonic Assisted Stir Casting Process" has just been published today! Read the full paper here: [ https://lnkd.in/gUpA_GAh] #MaterialsScience #Research #CompositeMaterials #Innovation #Nanotechnology #Science #Engineering #UltrasonicAssistedStirCasting #PublishedPaper

11th International Conference on High Temperature Capillarity May 26–30, 2024, Sweden https://lnkd.in/dptmBVUB Topics: - Surface/Interfacial phenomena of high-temperature melts - Surface/Interfacial tension of high-temperature melts - Reaction between the high-temperature melts and solid/gas - Pphenomena (Penetration behaviour) of high-temperature melts - Wetting behaviour of high-temperature melts - Segregation, grain boundary wetting and intergranular films - Metal/metal, metal/ceramic, metal/glass and ceramic/ceramic interfaces, and surfaces of high-temperature systems Materials: Metals, Alloys, Oxides, Ceramics, Refractory, Slag Approaches: Theoretical study (e.g., Thermodynamic discussion); Experimental study (e.g., Measurements, Advances in measurement techniques); Modelling (Theoretical or based on experiments); Simulation (e.g. CFD, Multi-physics model, Thermodynamic calculation) Some examples of the related processes: Additive manufacturing (AM); Metal matrix composite (MMC); Brazing/Joining; Laser cladding; Casting/Semi-solid metal casting; Materials processing by liquid-assisted techniques.

Ultra-High Temperature Ceramics (UHTCs) are essential materials for various industrial applications. Collaboration between Graphmatech, Uppsala University, and the The University of Huddersfield has resulted in groundbreaking achievements! Background: 🔍 Ultra-High Temperature Ceramics are renowned for their outstanding heat resistance and mechanical properties. 🏭 Widely utilized in aerospace, energy, and manufacturing sectors for applications such as thermal protection systems and cutting tools. Our Research Findings: - Graphmatech's patented Aros graphene successfully endured the manufacturing process at an extreme temperature of 1850°C with structure integrity. - Enhanced the thermal conductivity of TiB2-SiC ceramic by up to 53%, fracture toughness by up to 20% and the hardness by up to 16%. This research findings has a potential for revolutionary advancements in materials for high-temperature applications, including #cuttingtools, #fusionenergy, #concentratedsolarthermal, #aerospace This collaborative effort opens doors to innovative for high-temperature technologies! #ArosGraphene #ceramics #innovation Link to the publication: https://lnkd.in/dc8FNFam