| 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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Hannula, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2023Evaluation of strengthening mechanisms in novel fully ferritic advanced high-strength steels
- 2023Evaluation of hole expansion ratio of ultra-high strength martensitic steels produced with various processing routescitations
- 2023Precipitation behavior of novel 1 GPa ferritic advanced high strength steels
- 2022Effect of niobium, molybdenum and boron on the mechanical properties and microstructures of direct quenched ultra-high-strength steels
- 2021Evaluation of mechanical properties and microstructures of direct‐quenched and direct‐quenched and tempered microalloyed ultrahigh‐strength steels
- 2021Incompatible effects of B and B + Nb additions and inclusions’ characteristics on the microstructures and mechanical properties of low-carbon steels
- 2020Influence of chromium content on the microstructure and mechanical properties of thermomechanically hot-rolled low-carbon bainitic steels containing niobium
- 2020Optimization of niobium content in direct quenched high-strength steels
- 2019Infulence of chromium content of the mechanical properties and HAZ simulations of low-carbon bainitic steels
- 2019The effect of tempering on the microstructure and mechanical properties of a novel 0.4C press-hardening steel
- 2019The effect of microalloying elements on prior austenite grain growth of low-carbon slab material
- 2019Evaluation of mechanical properties and microstructures of molybdenum and niobium microalloyed thermomechanically rolled high-strength press hardening steel
- 2019The effect of microalloying on the sheared edge ductility of ferritic steels
- 2019Mechanical properties of direct-quenched ultra-high-strength steel alloyed with molybdenum and niobium
- 2014Mass, energy and material balances of SRF production process.:Part 1: SRF produced from commercial and industrial wastecitations
- 2014Mass, energy and material balances of SRF production process.:Part 2: SRF produced from construction and demolition wastecitations
- 2014Mass, energy and material balances of SRF production process.citations
- 2011High temperature corrosion of boiler waterwalls induced by chlorides and bromides:Part 1: Occurrence of the corrosive ash forming elements in a fluidised bed boiler co-firing solid recovered fuelcitations
- 2011Bromine as an ash forming element in a fluidised bed boiler combusting solid recovered fuelcitations
Places of action
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conferencepaper
Evaluation of hole expansion ratio of ultra-high strength martensitic steels produced with various processing routes
Abstract
ole expansion ratio of hot rolled ultra-high strength martensitic steels with tensile strength around 1000 MPa was evaluated. Steels were produced with direct quenching and traditional reheat and quenching processes with final thickness of 3 mm. Achieved yield strength values (Rp0.2) varied between 918–1068 MPa depending on the processing route. Mean hole expansion ratios (HER) in direct-quenched (DQ) and direct-quenched and tempered (DQT) conditions were between 22–36 %, and no clear improvement was seen after tempering treatment compared to quenched variant. HER values for reheat and quenched (RQ) and reheat, quenched and tempered (RQT) variants were between 31–49 %, and the highest values were achieved with RQT steels, which were tempered at 600 °C. Based on the field emission scanning electron microscope with electron backscatter scanning diffraction (FESEM-EBSD) analysis/characterization of martensite grain size, more uniform grain structure was discovered in RQ steels, which could be the reason for improved HER properties. HER values were also compared to tensile test results (uniform elongation, true thickness strain), and formability maps were constructed. However, only minor correlation was found between HER and true thickness strain values.