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Ranjan, R. (author), Ayas, C. (author), Langelaar, Matthijs (author), van Keulen, A. (author)A novel constraint to prevent local overheating is presented for use in topology optimization (TO). The very basis for the constraint is the Additive Manufacturing (AM) process physics. AM enables fabrication of highly complex topologically optimized designs. However, local overheating is a major concern especially in metal AM processes...journal article 2022
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Kuipers, T. (author)The products in our day to day lives have different requirements in different regions of the product. One way of dealing with such spatially varying requirements is to divide the product into multiple parts and assign each part a different material. For example, the handle of a drill is often fitted with a rubbery material which gives it more...doctoral thesis 2022
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Salvati, Enrico (author), Tognan, Alessandro (author), Laurenti, L. (author), Pelegatti, Marco (author), De Bona, Francesco (author)Defects in additively manufactured materials are one of the leading sources of uncertainty in mechanical fatigue. Fracture mechanics concepts are useful to evaluate their influence, nevertheless, these approaches cannot account for the real morphology of defects. Preliminary attempts to exploit a more comprehensive description of defects can...journal article 2022
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Nouri Goushki, M. (author), Eijkel, B.I.M. (author), Minneboo, M.B. (author), Fratila-Apachitei, E.L. (author), Zadpoor, A.A. (author)Modulation of the immune response following the implantation of biomaterials can have beneficial effects on bone regeneration. This involves complex interactions between the inflammatory and osteogenic cells. Therefore, the study of cell-cell interactions using direct co-culture models integrated with biomaterials is of great interest. This...journal article 2022
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Noroozi, Reza (author), Zolfagharian, Ali (author), Fotouhi, M. (author), Bodaghi, Mahdi (author)Additive manufacturing (AM), as one of the most powerful manufacturing methods, is fabricating a three-dimensional (3D) structure using computer-aided design (CAD) data by adding material layer by layer. In contrast to traditional manufacturing processes that start from raw block material and remove waste materials, the AM process can...book chapter 2022
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Tankova, T. (author), Andrade, David (author), Branco, Ricardo (author), Zhu, Carlos (author), Rodrigues, Dulce (author), Simões da Silva, Luís (author)This paper analyses the microstructural and mechanical properties of carbon steel coupons produced by CMT-WAAM. The strategy adopted in the fabrication of the test specimens using a robotised facility is explained. Then, the results of the mechanical characterization performed using as-built and machined samples, extracted in several...journal article 2022
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Shakerin, Sajad (author), Sanjari, Mehdi (author), Pirgazi, H. (author), Amirkhiz, Babak Shalchi (author), Mohammadi, Mohsen (author)Maraging steel (MS1)-tool steel (P20) bimetals additively manufactured using the laser powder bed fusion technique were studied under different heat treatment cycles and loading conditions. The hardening of P20 and aging of MS1 were performed sequentially on the hybrid samples. The interfacial characteristics and microstructural evolution of...journal article 2022
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Mishra, V. (author), Ayas, C. (author), Langelaar, Matthijs (author), van Keulen, A. (author)A remarkable elastic anisotropy in plates of austenitic stainless steel produced by the Wire and Arc Additive Manufacturing process is recently reported. The Young's modulus depends on the angle of orientation with respect to the material deposition direction. Here, for the first time, this anisotropy is exploited to maximize structural...journal article 2022
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Dong, J. (author), Tümer, N. (author), Leeflang, M.A. (author), Taheri, P. (author), Fratila-Apachitei, E.L. (author), Mol, J.M.C. (author), Zadpoor, A.A. (author), Zhou, J. (author)Porous biodegradable Mg and its alloys are considered to have a great potential to serve as ideal bone substitutes. The recent progress in additive manufacturing (AM) has prompted its application to fabricate Mg scaffolds with geometrically ordered porous structures. Extrusion-based AM, followed by debinding and sintering, has been recently...journal article 2022
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Hille, Helge C. (author), Kumar, Siddhant (author), De Lorenzis, Laura (author)We propose Floating Isogeometric Analysis (FLIGA), which extends IGA to extreme deformation analysis. The method is based on a novel tensor-product construction of B-Splines for the update of the basis functions in one direction of the parametric space. With basis functions “floating” deformation-dependently in this direction, mesh distortion...journal article 2022
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Maicas Esteve, H. (author), Taji, Iman (author), Wilms, M.E. (author), Gonzalez Garcia, Y. (author), Johnsen, Roy (author)The use of metal additive manufacturing (AM) has strongly increased in the industry during the last years. More specifically, selective laser melting (SLM) is one of the most used techniques due to its numerous advantages compared to conventional processing methods. The purpose of this study is to investigate the effects of process parameters...journal article 2022
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Borisov, Evgenii (author), Gracheva, Anna (author), Popovich, V. (author), Popovich, Anatoly (author)The paper investigates the effect of hot isostatic pressing of single-crystal nickel-based alloy manufactured by selective laser melting (SLM) with a high-temperature substrate preheating. A study of the structure and phase composition of the material before and after treatment has been carried out. It was found that as a result of such...conference paper 2022
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Fu, J. (author)Oxide dispersion strengthened (ODS) steels are promising candidates for use as structural materials in the next generation fission and fusion reactors. Compared to conventional ferritic or martensitic steels, ODS steels exhibit improved high-temperature creep properties and irradiation resistance. Favourable properties are mainly attributed to...doctoral thesis 2021
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Wu, J. (author), Sigmund, Ole (author), Groen, Jeroen P. (author)Multi-scale structures, as found in nature (e.g., bone and bamboo), hold the promise of achieving superior performance while being intrinsically lightweight, robust, and multi-functional. Recent years have seen a rapid development in topology optimization approaches for designing multi-scale structures, but the field actually dates back to...review 2021
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Borisov, Evgenii (author), Starikov, Kirill (author), Kim, Artem (author), Popovich, V. (author), Popovich, Anatoly (author)The aim of this study was to determine the influence of heat treatment on the microstructure of single-crystal nickel-based alloy manufactured by selective laser melting with a high-temperature substrate preheating. The change of gamma/gamma prime -phases ratio was established as a result of various heat treatment modes.conference paper 2021
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van de Ven, E.A. (author), Maas, Robert (author), Ayas, C. (author), Langelaar, Matthijs (author), van Keulen, A. (author)Although additive manufacturing (AM) allows for a large design freedom, there are some manufacturing limitations that have to be taken into consideration. One of the most restricting design rules is the minimum allowable overhang angle. To make topology optimization suitable for AM, several algorithms have been published to enforce a minimum...journal article 2021
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Kerstens, Fabio (author), Cervone, A. (author), Gradl, P.R. (author)High performance liquid rocket engines require cooling to maintain structural integrity of the combustion chamber which is exposed to high thermal and environmental loads. For many systems, this is achieved by means of regenerative cooling, where a coolant flows through passages around the chamber wall whilst extracting heat from the wall. A...journal article 2021
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Lussenburg, K.M. (author), Sakes, A. (author), Breedveld, P. (author)Additive Manufacturing (AM) or 3D printing has enabled the production of increasingly complex parts that are difficult to produce with conventional manufacturing methods. Its additive nature has made it possible to create interlocking parts in a single production step. This creates opportunities for new ways of designing and producing...review 2021
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Boon, W.P.C. (author), van Wee, G.P. (author)3D printing (3DP) is an emerging technology associated with a more tailor-made, distributed way of manufacturing which, if successful, is bound to have repercussions on transport, supply chains, and logistics. This contribution delves into what 3DP is, how it will influence consumer wants and needs, location choices and transport resistance, and...book chapter 2021
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Shakil, S. I. (author), Hadadzadeh, A. (author), Shalchi Amirkhiz, B. (author), Pirgazi, H. (author), Mohammadi, M. (author), Haghshenas, M. (author)This study aims at assessing the effect of solution heat treatment (at a temperature just below the eutectic temperature) followed by various cooling rates on the microstructure and mechanical properties of additively manufactured AlSi10Mg and the cast counterpart. The mechanical properties were evaluated using a depth-sensing nanoindentation...journal article 2021