| 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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Leitner, Harald
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2023Influence of platform preheating on in situ precipitation in an FeCoMo alloy during laser powder bed fusioncitations
- 2022Potential Causes for Cracking of a Laser Powder Bed Fused Carbon-free FeCoMo Alloycitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steelcitations
- 2022Cracking mechanism in a laser powder bed fused cold-work tool steel: The role of residual stresses, microstructure and local elemental concentrationscitations
- 2022Local microstructural evolution and the role of residual stresses in the phase stability of a laser powder bed fused cold-work tool steelcitations
- 2021Influence of thermomechanical fatigue loading conditions on the nanostructure of secondary hardening steelscitations
- 2020METHOD FOR PRODUCING AN ARTICLE FROM A MARAGING STEEL
- 2020Defects in a laser powder bed fused tool steelcitations
- 2020Determination of Martensite Start Temperature of High‐Speed Steels Based on Thermodynamic Calculationscitations
- 2019Microstructural evolution of a dual hardening steel during heat treatmentcitations
- 2019VERFAHREN ZUM HERSTELLEN EINES GEGENSTANDS AUS EINEM MARAGING-STAHL
- 2019Thermomechanical fatigue testing of dual hardening tool steelscitations
- 2017The potential for grain refinement of a super austenitic stainless steel with a cerium grain refiner
- 2008δ-phase characterization of superalloy Allvac 718 Plus™
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article
Determination of Martensite Start Temperature of High‐Speed Steels Based on Thermodynamic Calculations
Abstract
<p>High-speed steels (HSS) exhibit a microstructure that comprises a martensitic matrix with carbides. Due to the generally high thermal stability of carbides, it is necessary to perform hardening at very high austenitizing temperatures. Nevertheless, there are certain carbides in HSS that are not dissolved. Therefore, the composition of the austenite, which can be transformed into martensite, is significantly different from the alloys’ nominal composition. Consequently, commonly applied formulae for the calculation of martensite start temperature (Formula presented.) cannot be used for HSS. The current study demonstrates how empirical (Formula presented.) formulae, which are basically applied for low-alloyed steels, where no carbides are present at austenitizing temperature, can be modified for high-alloyed HSS by applying thermodynamic calculations. Thermo-Calc software is utilized to calculate the composition of the austenite at two different austenitizing temperatures, and with these compositions (Formula presented.) are calculated subsequently. For experimental verification, (Formula presented.) of four alloys, which are quenched from these austenitizing temperatures, are determined using dilatometry. The experimental results show good agreement with the corresponding thermodynamic equilibrium calculations. Furthermore, the results reveal that Co does not raise (Formula presented.) as predicted by the commonly applied empirical formulae. Therefore, adapted formulae for HSS in a wide composition range are proposed.</p>