| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Luković, Mladena
Delft University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (44/44 displayed)
- 2024Structural behaviour of reinforced concrete beams with self-healing cover zone as lost formworkcitations
- 2023Long-Term Mechanical and Durability Behaviour of Two Alkali-Activated Types of Concrete
- 2023Notched Beam Test for SHCC-Concrete Interface
- 2023Strengthening of Reinforced Concrete Beams with Ultra-high Performance Fiber-Reinforced Concrete in Shearcitations
- 2023Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams
- 2023Strain Hardening Cementitious Composite in Reinforced Concrete Cover Zone for Crack Width Control
- 2023Shear behaviour of reinforced concrete beams strengthened with ultra-high performance fiber reinforced concrete (UHPFRC)citations
- 2023Multiscale analysis of long-term mechanical and durability behaviour of two alkali-activated slag-based types of concretecitations
- 2023Structural performance of reinforced concrete beams with self-healing cover zonecitations
- 2023The role of eigen-stresses on apparent strength and stiffness of normal, high strength, and ultra-high performance fibre reinforced concretecitations
- 2022Quantification of Concrete-Concrete Interface Strength – A Review
- 2022Strengthening of concrete structures with ultra high performance fiber reinforced concrete (UHPFRC)citations
- 2022Experimental and numerical investigation on the role of interface for crack-width control of hybrid SHCC concrete beamscitations
- 2021Static and dynamic testing of delamination in hybrid SHCC/concrete beamscitations
- 2020Cementitious cellular composites with auxetic behaviorcitations
- 2020Scheurvorming in jong beton
- 2020Tunable mechanical behavior of auxetic cementitious cellular composites (CCCs)citations
- 2020Effect Of Interface Treatment On The Cracking Behaviour Of Hybrid SHCC (Strain Hardening Cementitious Composite) Concrete Beams
- 2019Strain-Hardening Cementitious Composite (SHCC) For Durable Concrete Repair
- 2019Strain hardening cementitious composite (SHCC) for crack width control in reinforced concrete beams
- 2018Mechanical properties of ductile cementitious composites incorporating microencapsulated phase change materialscitations
- 2018Strain hardening cementitious composite (SHCC) layer for the crack width control in reinforced concrete beam
- 2018Brittleness of high-strength lightweight aggregate concrete
- 2018Effect of natural carbonation on the pore structure and elastic modulus of the alkali-activated fly ash and slag pastescitations
- 2018Development and application of an environmentally friendly ductile alkali-activated compositecitations
- 2017Development of ductile cementitious composites incorporating microencapsulated phase change materialscitations
- 2017Moisture movement in cement-based repair systems monitored by X-ray absorption
- 2017Moisture movement in cement-based repair systems monitored by X-ray absorption
- 2017Failure modes in concrete repair systems due to ongoing corrosioncitations
- 2017Failure Modes in Concrete Repair Systems due to Ongoing Corrosioncitations
- 2016Interactie beton en reparatiemiddel (1)
- 2016Towards slender, innovative concrete structures for replacement of existing viaducts
- 2016A 3D lattice modelling study of drying shrinkage damage in concrete repair systemscitations
- 2016Cracking of SHCC due to reinforcement corrosioncitations
- 2016A comparison between ultra-high-strength and conventional high-strength fastener steelscitations
- 2016Interactie beton en reparatiemiddel (2)
- 2015Using nano-indentation and microscopy to obtain mechanical properties
- 2014Modeling of concrete cover cracking due to reinforcement corrosion
- 2014Decorative application of strain-hardening cementitious composites
- 2014A modelling study of drying shrinkage damage in concrete repair systems
- 2014SHCC3: Strain Hardening Cementitious Composites
- 2014Damage induced by continued corrosion in concrete repair systems
- 2013Lattice modeling of cover cracking due to reinforcement corrosion
- 2013Micromechanical study of the interface properties of concrete repair systems
Places of action
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article
A comparison between ultra-high-strength and conventional high-strength fastener steels
Abstract
A comparison is made between the mechanical properties of the ultra-high-strength steel KNDS4 of fastener grade 14.9 and of conventional, high-strength steels 34Cr4 of fastener grade 12.9 and 33B2 of grade 10.9. The results show that the ratio of the yield strength at elevated temperatures to the yield strength at room temperature is higher for the ultra-high-strength steel than for both conventional highstrength steels, especially at 500°C. Moreover, the results show a trend in which the nano-indentation creep rate is lower as the strength of the steels is higher. The improved mechanical properties of the KNDS4 steel compared to the conventional high-strength steels are related to the smaller size of the alloy carbides in the KNDS4 steel. Furthermore, the effect of an alternative (industrial) heat-treatment on the evolution of the microstructure and hardness of the KNDS4 steel was investigated. Changing the industrial heat treatment can increase the hardness of KNDS4 by about 8%, since more alloy carbides can nucleate and grow. However, the standard industrial heat treatment results in a refinement of the martensite microstructure (grain size), which might be more beneficial for the toughness of the steel. Independent of the heat treatment, the mechanical performance of KNDS4 fasteners at elevated temperature and the low nano-indentation creep rates are two strong indicators that fasteners made from KNDS4 steel might be used at higher service temperatures than traditional high strength fasteners.