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Kies, Fabian (author), Ikeda, Yuji (author), Ewald, Simon (author), Schleifenbaum, Johannes H. (author), Hallstedt, Bengt (author), Körmann, F.H.W. (author), Haase, Christian (author)
Density functional theory (DFT) calculations were performed on Al<sub>x</sub>C<sub>y</sub>CoFeMnNi multi-principal element alloys (MPEAs) to understand the influence of Al and C on the stacking-fault energy (SFE). C addition to CoFeMnNi resulted in increased SFE, while it decreased in Al-alloyed CoFeMnNi. For experimental verification, Al<sub...
journal article 2020
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Eftekharimilani, P. (author)
The potential for weight reduction, ease of manufacturing and improved crashworthiness makes advanced and ultra high strength steels attractive for automotive applications. Resistance spot welding is by far the most widely used joining method in the automotive industry due to the high operating speeds, the reliability of the process and the...
doctoral thesis 2019
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Fan, J. (author), Wang, Zhen (author), Zhang, Xunwei (author), Deng, Zentao (author), Fan, Xuejun (author), Zhang, G.Q. (author)
In a high-power white light emitting diode (LED) package, the phosphor/silicone composite is typically used for photometric and colorimetric conversions, ultimately producing the white light. However, the phosphor/silicone composite is always exposed under harsh environments with high temperature, high blue light irradiation and high moisture...
journal article 2019
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Lantsoght, E.O.L. (author)
Even though the structural behavior steel fiber reinforced concrete (SFRC) has been extensively researched, structural applications are still limited. One barrier to its implementation is the lack of mechanical models that describe the behaviour of SFRC members failing in shear. This paper reviews the effect of steel fibers on the different...
review 2019
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Ikeda, Yuji (author), Grabowski, Blazej (author), Körmann, F.H.W. (author)
Multicomponent alloys with multiple principal elements including high entropy alloys (HEAs) and compositionally complex alloys (CCAs) are attracting rapidly growing attention. The endless possibilities to explore new alloys and the hope for better combinations of materials properties have stimulated a remarkable number of research works in...
review 2019
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Zhang, H. (author), Schlangen, H.E.J.G. (author), Šavija, B. (author)
This work aims to investigate the mechanical properties of the cement paste-aggregate interface by combining experimental and numerical approaches. The multi-phase interface microstructure was obtained by X-ray computed tomography (XCT) and submitted to a discrete fracture lattice model for fracture analysis. Apart from the modelling, a...
conference paper 2019
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Ma, X. (author), Schlangen, H.E.J.G. (author), Copuroglu, O. (author)
The aim of this paper is to investigate the mechanical properties of cement paste specimens by both experimental and numerical methods. Firstly, the specimens subjected to uniaxial tensile loading were studied experimentally. Afterwards, numerical investigation was carried out based on the experimental observations. Two types of specimens...
journal article 2019
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Grazioli, D. (author), Verners, O. (author), Zadin, Vahur (author), Brandell, Daniel (author), Simone, A. (author)
We analyze the effects of mechanical stresses arising in a solid polymer electrolyte (SPE) on the electrochemical performance of the electrolyte component of a lithium ion battery. The SPE is modeled with a coupled ionic conduction-deformation model that allows to investigate the effect of mechanical stresses induced by the redistribution of...
journal article 2019
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Li, Z. (author), Nedeljković, M. (author), Chen, B. (author), Ye, G. (author)
This study investigates the effectiveness of metakaolin (MK)in mitigating the autogenous shrinkage of alkali-activated slag (AAS). It is found that the autogenous shrinkage of AAS paste can be reduced by 40% and 50% when replacing 10% and 20% slag with MK, respectively. By providing additional Si and Al, and decreasing the pH of the pore...
journal article 2019
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Kiani Khouzani, M. (author), Bahrami, A. (author), Yazdan Mehr, M. (author)
This paper aims at studying microstructure and mechanical properties of spark plasma sintered (SPSed) Stellite®-6 cobalt-based superalloy. SPS is a sintering technique, based on a relatively fast resistance heating using a pulsed current. Fast sintering process, associated with minimum grain growth, results in excellent mechanical properties....
journal article 2019
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Fu, J. (author), Brouwer, J.C. (author), Richardson, I.M. (author), Hermans, M.J.M. (author)
Oxide dispersion strengthened (ODS)Eurofer steel was prepared via mechanical alloying (MA)and spark plasma sintering (SPS). Different combinations of MA and SPS parameters were adopted in order to optimise the fabrication process. The experimental results show that the sample milled for 30 h, sintered at 1373 K at a pressure of 60 MPa has...
journal article 2019
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El-Dessouky, H. M. (author), Saleh, M.A.S.N. (author), Gautam, M. (author), Han, G. (author), Scaife, R. J. (author), Potluri, P. (author)
Tailored fibre placement (TFP) is an embroidery-based technology that allows the fibre tows to be placed exactly where they are most needed for structural performance and stitched into position on a compatible textile or polymer substrate. In this study commingled carbon-nylon fibre tows were utilised to produce thermoplastic cross-ply net...
journal article 2019
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Gökçe, H. Süleyman (author), Yalçinkaya, Ç. (author), Tuyan, Murat (author)
High performance concrete has been often preferred in special engineering structures and in challenging composites products. Researchers have recently focused on the radiation shielding characteristics of these type concrete mixtures due to rising nuclear industry in the developing world. In the study, performance of reactive powder concrete...
journal article 2018
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Chandra Paul, Suvash (author), Šavija, B. (author), Babafemi, Adewumi John (author)
Disposal of consumer waste is a major challenge in urban areas around the world. In the field of building materials, it has long been recognized that many types of wastes can be used instead of raw materials. In addition, production of binders such as Portland cement is a CO<sub>2</sub> intensive process. However, for widespread use of wastes...
review 2018
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Zhao, T. (author), Broek, C.A. (author), Palardy, G. (author), Fernandez Villegas, I. (author), Benedictus, R. (author)
The research in this paper is an essential part of a bigger effort on developing robust sequential ultrasonic welding of multi-spot welded joints in thermoplastic composites. It mainly focused on assessing the impact of the changes in boundary conditions on the welding process and whether it could be circumvented by using an appropriate...
journal article 2018
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Hedayati, R. (author), Ahmadi, S.M. (author), Lietaert, K. (author), Tümer, N. (author), Li, Y (author), Amin Yavari, S. (author), Zadpoor, A.A. (author)
Magnesium and its alloys have the intrinsic capability of degrading over time in vivo without leaving toxic degradation products. They are therefore suitable for use as biodegradable scaffolds that are replaced by the regenerated tissues. One of the main concerns for such applications, particularly in load-bearing areas, is the sufficient...
journal article 2018
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Hedayati, R. (author), Sadighi, M. (author)
Metal foams are cellular solids that show some unique properties which cannot be found in other natural or human-made materials. While the impact characteristics of closed-cell foams under static and impact loadings appear to be well-studied in the literature, the impact behaviour of open-cell foams is not yet well-understood. In this study,...
journal article 2018
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Zhang, Xiang Yu (author), Fang, Gang (author), Xing, Lei Lei (author), Liu, Wei (author), Zhou, J. (author)
Functionally graded scaffold (FGS) is designed to mimic the morphology, mechanical and biological properties of natural bone closely. Porosity variation strategy between different regions in FGS plays a crucial role in influencing its mechanical and biological performance. A combination of modeling tool and scripting language can effectively...
journal article 2018
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Fu, W. (author), van Paassen, M.M. (author), Mulder, M. (author)
Wave-variable transformation is a means to maintain stability of haptic teleoperation in the presence of communication time delays. Its drawback is that it affects haptic perception of remote properties and thereby degrades transparency. This paper studies the effect of wave-variable transformation on human haptic perception. Based on a...
conference paper 2018
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Ikeda, Yuji (author), Körmann, F.H.W. (author), Dutta, Biswanath (author), Carreras, Abel (author), Seko, Atsuto (author), Neugebauer, Jörg (author), Tanaka, Isao (author)
A first-principles-based computational tool for simulating phonons of magnetic random solid solutions including thermal magnetic fluctuations is developed. The method takes fluctuations of force constants due to magnetic excitations as well as due to chemical disorder into account. The developed approach correctly predicts the experimentally...
journal article 2018
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