Article
Engineering, Manufacturing
W. Schneller, M. Leitner, S. Leuders, J. M. Sprauel, F. Grun, T. Pfeifer, O. Jantschner
Summary: The research aims to contribute to the fatigue strength assessment of selectively laser melted metallic structures by deriving a methodology based on experimental data and focusing on residual stresses and material properties. By considering the effects of thermal gradients and residual stresses, the study introduces a correction factor to established designing concepts to estimate fatigue strength within a conservative region.
ADDITIVE MANUFACTURING
(2021)
Article
Chemistry, Physical
Gina Eileen Chiara Schmeier, Clara Troeger, Young W. Kwon, Delf Sachau
Summary: Experimental and computational studies were carried out to predict the failure loads of specimens with different-sized holes made using additive manufacturing. Unique test specimens were designed and printed to apply combined bending and torsional loads to tubular specimens. A new failure theory based on stress and stress gradient conditions was applied to predict the fracture loads, and the results were compared with experimental data. Additionally, a semi-empirical equation was developed to predict the critical failure surface energy for different printing angles, providing close agreement with experimental results.
Article
Materials Science, Multidisciplinary
Ruben Loland Saelen, Odd Sture Hopperstad, Arild Holm Clausen
Summary: This study investigates the mechanical response of a polymer manufactured with additive manufacturing technology and develops a corresponding constitutive model for numerical simulation. The experimental results validate the accuracy of the model and demonstrate the importance of additive manufacturing technology in engineering applications.
MECHANICS OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Vibhas Mishra, Can Ayas, Matthijs Langelaar
Summary: This study presents a method to control material properties by controlling the local thermal history in metal Additive Manufacturing (AM). By using topology optimization, desired properties can be achieved in high strength low alloy steels.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Chao Yuan, Fangfang Wang, David W. Rosen, Qi Ge
Summary: The article introduces a new voxel design strategy for spatially customizing polymeric structures in additive manufacturing by constructing digital materials, which can adjust the material properties, and demonstrates structures with spatially tunable actuation speed and multiple stable configurations.
MATERIALS & DESIGN
(2021)
Article
Engineering, Multidisciplinary
Xinye Cao, Bin Ji, Yongqiang Li, Xiyue An, Hualin Fan, Linda Ke
Summary: Innovative sandwich cylinders with pyramidal lattice truss-cores were designed, printed, tested, and analyzed using selective laser melting (SLM) additive manufacturing (AM) technique. Uniaxial compression tests of two groups of aluminum alloy sandwich cylinders showed failure at facesheet yielding, followed by post-plastic local buckling. A new multi-failure theory was proposed to predict plastic buckling load and provide a hierarchical failure map for optimal design of additively manufactured lattice-core sandwich cylinders.
COMPOSITES PART B-ENGINEERING
(2021)
Article
Acoustics
Agnieszka Ciochon, John Kennedy, Raphael Leiba, Lara Flanagan, Mark Culleton
Summary: The effects of surface roughness on the acoustic properties of additively manufactured parts were investigated. Computational models with smooth and rough surfaces were created and the results were compared with experimental data. It was found that surface roughness accurately captured the variations in acoustic performance, but it was not enough to fully explain the differences between experimental and numerical data.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Materials Science, Multidisciplinary
Lizhen Tan, Weicheng Zhong, Ying Yang, Kevin G. Field, Niyanth Sridharan, Andrew T. Nelson
Summary: Limited studies have evaluated the creep behavior of additively manufactured ferritic-martensitic steels. This study investigated the creep behavior of a 9Cr FM steel fabricated by powder blown directed energy deposition technique. The results showed a threshold temperature between 600 and 625 degrees C, below which the steel exhibited better creep resistance compared to other steels. The creep behavior and fracture surface morphology also differed at temperatures above and below the threshold.
JOURNAL OF NUCLEAR MATERIALS
(2022)
Article
Chemistry, Physical
Grzegorz Socha
Summary: A new failure criterion for additively manufactured materials, based on void growth-based ductile failure models, is proposed in this paper. The calibration procedure for the ductile failure criterion is simple and accurate, preventing strain localization from disturbing stress distribution at the failure zone. The original criterion was modified to better fit the deformation behavior of additively manufactured materials, and examples of calibration and analysis for 316L alloy steel are provided.
Article
Engineering, Manufacturing
Ross Johnston, Zafer Kazanci
Summary: This study compares the effects of different material combinations on the performance of cellular structures, finding that single-material structures perform best in single loading cycle situations, while multi-material structures are suitable for situations requiring multiple loading cycles. Introducing materials with varying stiffnesses into specific regions within the structure can modify the Poisson's ratio during compression, improving overall performance.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Mechanical
Nejc Novak, Oraib Al-Ketan, Anja Mauko, Yunus Emre Yilmaz, Lovre Krstulovic-Opara, Shigeru Tanaka, Kazuyuki Hokamoto, Reza Rowshan, Rashid Abu Al-Rub, Matej Vesenjak, Zoran Ren
Summary: This study investigated the mechanical response of additively manufactured sheet-based stochastic cellular materials under impact loading. Samples with different relative densities were fabricated using the powder bed fusion additive manufacturing technique. The samples were then tested under quasi-static and dynamic compressive loading conditions to evaluate their mechanical behavior.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Engineering, Biomedical
Elham Davoodi, Hossein Montazerian, Anooshe Sadat Mirhakimi, Masoud Zhianmanesh, Osezua Ibhadode, Shahriar Imani Shahabad, Reza Esmaeilizadeh, Einollah Sarikhani, Sahar Toorandaz, Shima A. Sarabi, Rohollah Nasiri, Yangzhi Zhu, Javad Kadkhodapour, Bingbing Li, Ali Khademhosseini, Ehsan Toyserkani
Summary: Metal additive manufacturing has revolutionized the design and fabrication of hard tissue substitutes, allowing for personalized implants and improved tissue integration. This review highlights the latest advances in the design and manufacturing of metallic biomaterials through additive manufacturing processes, as well as the potential applications for tissue regeneration.
BIOACTIVE MATERIALS
(2022)
Article
Chemistry, Physical
Sebastian Rothe, Christopher Blech, Hagen Watschke, Thomas Vietor, Sabine C. Langer
Summary: This study investigates beams of different thicknesses experimentally and numerically to identify the material parameters in relation to frequency and thickness in order to enhance design freedom. The increasing Young's modulus with increasing frequency and thickness is observed, with considerable influence on the results.
Review
Polymer Science
Nima Zohdi, Richard (Chunhui) Yang
Summary: Additive manufacturing (AM) is a sustainable and innovative technology used to fabricate products with specific properties and complex shapes. Challenges remain, such as material anisotropy, which requires exploration of methods to minimize its negative impact.
Article
Multidisciplinary Sciences
Wuxin Yang, Malaya Prasad Behera, Yifan Lv, Loulin Huang, Sarat Singamneni
Summary: This study proposes a novel cellular structured solution to achieve beam deflection profiles closely matched with preset conditions under different loading conditions. The optimal structure of the cells is continually searched and converged upon by altering the cellular geometry iteratively using the covariance matrix adaptation evolution strategy algorithm. The optimized beam structures can be physically produced with single material additive manufacturing methods, and the experimental and numerical beam deflection responses closely correlate.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Manufacturing
Navid Alinejadian, Pei Wang, Lauri Kollo, Konda Gokuldoss Prashanth
Summary: This study focuses on fabricating dense and near crack-free commercial pure molybdenum samples using selective laser melting (SLM). The use of a double scan strategy helps reduce the formation of solidification cracks.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Engineering, Manufacturing
Himanshu Singh Maurya, Lauri Kollo, Marek Tarraste, Kristjan Juhani, Fjodor Sergejev, Konda Gokuldoss Prashanth
Summary: In this study, TiC-Fe cermets were fabricated using pulse shaping technique and regular laser pulse wave for the first time in selective laser melting (SLM). The effect of laser peak power and pulse shaping on the microstructure development was investigated, and the results showed that pulse shaping can effectively avoid cracking in brittle materials processed by SLM.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Rathinavelu Sokkalingam, Zhao Chao, Katakam Sivaprasad, Veerappan Muthupandi, Jayamani Jayaraj, Parthiban Ramasamy, Juergen Eckert, Konda Gokuldoss Prashanth
Summary: CoCrFeMnNi high-entropy alloy/AISI 316L stainless steel bimetal was fabricated using SLM, showing enhanced hardness and tensile strength due to the composition and structure advantages. However, the presence of defects and higher susceptibility to pitting corrosion in CoCrFeMnNi-HEA make it more prone to corrosion attack in corrosive environments.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Sabine C. Bodner, Kostyantin Hlushko, Kevin Kutlesa, Juraj Todt, Oliver Renk, Michael Meindlhumer, Florian Resch, Marc-Andre Nielsen, Jozef Keckes, Jurgen Eckert
Summary: The correlations between process conditions, microstructure, and mechanical properties of additively manufactured components are explored in this study. The results show that the applied hatch strategy has a significant impact on the microstructure and mechanical properties of the samples, especially the anisotropy observed in the plane perpendicular to the build direction.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Metallurgy & Metallurgical Engineering
H. S. Maurya, L. Kollo, M. Tarraste, K. Juhani, F. Sergejev, K. G. Prashanth
Summary: The development of microstructure and mechanical properties of TiC-Fe based cermets fabricated through selective laser melting (SLM) and post-treatment processes were studied. Pulse shaping technique was used to distribute energy uniformly and control the laser material exposure. Laser beam optimization proved to be an effective method for crack-free cermets fabrication.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Materials Science, Multidisciplinary
Sepide Hadibeik, Florian Spieckermann, Martin Nosko, Farzad Khodabakhshi, Mahmoud Heydarzadeh Sohi, Juergen Eckert
Summary: A novel approach for fabricating bulk metallic glass using additive manufacturing has been studied, however, there are challenges, such as unmelted powder and compositional deviation, that need further investigation to optimize the process parameters.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ming-Zhi Zhang, Kun Zhang, Kai-Kai Song, Xiao-Yu Zou, Wei-Dong Song, Ke-Feng Li, Li-Na Hu, Ze-Qun Zhang, Juergen Eckert
Summary: In this study, CoCrFeMnNi high-entropy alloys with a surface gradient nanostructure were produced using industrial shot blasting, which significantly improved their mechanical properties. The severely plastically deformed surface layer had a multi-scale hierarchical structure and increased in depth with shot-blasting time. The microhardness and tensile strength of the alloy were significantly higher after shot-blasting. The improved strain hardening and prevention of early necking in the gradient-nanostructured surface layer contributed to its high toughness.
Article
Chemistry, Physical
Monika Antoni, Florian Spieckermann, Niklas Plutta, Christoph Gammer, Marlene Kapp, Parthiban Ramasamy, Christian Polak, Reinhard Pippan, Michael J. J. Zehetbauer, Juergen Eckert
Summary: The effects of severe plastic deformation (SPD) by means of high-pressure torsion (HPT) on Fe73.9Cu1Nb3Si15.5B6.6 and Fe81.2Co4Si0.5B9.5P4Cu0.8 iron-based metallic glasses were compared. HPT processing extended the consolidation and deformation ranges for Fe73.9Cu1Nb3Si15.5B6.6, and achieved consolidation and deformation with minimum cracks for Fe81.2Co4Si0.5B9.5P4Cu0.8 for the first time. Various analyses revealed that Fe81.2Co4Si0.5B9.5P4Cu0.8 exhibited HPT-induced crystallization phenomena, while Fe73.9Cu1Nb3Si15.5B6.6 did not crystallize even at high HPT-deformation degrees.
Editorial Material
Chemistry, Multidisciplinary
Juergen Eckert, Daniel Kiener
Article
Chemistry, Physical
Keziban Huner, Baran Sarac, Eray Yuece, Amir Rezvan, Matej Micusik, Maria Omastova, Juergen Eckert, A. Sezai Sarac
Summary: The incorporation of iron and carboxylic acid-functionalized polyaniline into polymeric polycaprolactone structures enhances the electron-donating ability and conductivity of the compound, making it suitable for electrochemical immunosensors.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)
Editorial Material
Materials Science, Multidisciplinary
Chao Yang, Lai-Chang Zhang, Suryanarayana Challapalli
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
W. S. Cai, H. Z. Lu, H. Z. Li, Z. Liu, H. B. Ke, W. H. Wang, C. Yang
Summary: An ultrafine-grained NiTi-based shape memory alloy with excellent superelasticity was successfully prepared through spark plasma sintering, and its microstructural evolution and superelastic properties were investigated. The results showed that residual nano-scale amorphous phase and coherent or semi-coherent fcc (Ti,Zr)2Ni precipitate played important roles in achieving perfect superelasticity.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Manufacturing
Ruiqi Wang, Lixia Xi, Lili Feng, Baran Sarac, Konda Gokuldoss Prashanth, Juergen Eckert, Dongdong Gu
Summary: Dual-phase reinforcing approach is an efficient strategy for fabricating advanced aluminum matrix composites. However, designing a dual-phase reinforcing system with synergistic strengthening effect for LPBF process is challenging.
3D PRINTING AND ADDITIVE MANUFACTURING
(2023)
Article
Materials Science, Multidisciplinary
Xintian Wang, Zhiyong Ji, Robert O. Ritchie, Ilya Okulov, Juergen Eckert, Chunlei Qiu
Summary: In this study, TiAl and Cr3C2 particles were added to a CrMnFeCoNi alloy to improve its processibility and mechanical properties. The addition of TiAl particles resulted in the formation of cracks, but the further addition of Cr3C2 particles helped suppress hot cracking. The presence of long-range ordered domains and precipitates contributed to the improved strength of the dual-particle containing alloy.
MATERIALS TODAY ADVANCES
(2023)
Article
Chemistry, Physical
Baran Sarac, Remzi Gurbuz, Matej Micusik, Maria Omastova, Amir Rezvan, Eray Yuece, Lixia Xi, Juergen Eckert, Ali Ozcan, A. Sezai Sarac
Summary: This study focuses on the synthesis and properties comparison of a novel organic composite nanofiber material consisting of styrene-butadiene-styrene (SBS) copolymer blended with polystyrene (PStyr) and carbon nanotubes (CNTs). The addition of CNTs retards the crystallization process and decreases the absorbance of both SBS/PStyr and PStyr/PBu in Fourier transform infrared spectroscopy. The interaction of CNTs with the blend is limited in samples with SBS, as observed in Raman spectroscopy.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2023)