A5032504421- Metallurgical Processes and Thermodynamics
- Microstructure and Mechanical Properties of Steels
- Metallurgy and Material Forming
- Metal Alloys Wear and Properties
- Aluminum Alloy Microstructure Properties
- Hydrogen embrittlement and corrosion behaviors in metals
- Iron and Steelmaking Processes
- Education Systems and Policy
- Social Policy and Reform Studies
- Materials Engineering and Processing
- Geophysics and Gravity Measurements
- Diverse Educational Innovations Studies
- Stress Responses and Cortisol
- Advanced Welding Techniques Analysis
- Labor market dynamics and wage inequality
- Higher Education Research Studies
- Metal Extraction and Bioleaching
- Magnetic Properties and Applications
- High-Temperature Coating Behaviors
- Housing, Finance, and Neoliberalism
- Fluid Dynamics and Thin Films
- Aeolian processes and effects
- Advanced ceramic materials synthesis
- Material Science and Thermodynamics
- High Temperature Alloys and Creep
TU Bergakademie Freiberg
2005-2012
Max-Planck-Institut für Nachhaltige Materialien
2011
Institute of Metallurgy
2011
VDEh-Betriebsforschungsinstitut
2011
Jernkontoret (Sweden)
2011
Chinese Society for Electrical Engineering
2011
John Wiley & Sons (Germany)
2011
TU Dresden
1995
Abstract Modern steel developments often use additional deformation mechanisms like the induced martensitic transformation (TRIP‐effect) and mechanical twinning (TWIP‐effect) to enhance elongation strength. Three high‐alloyed cast CrMnNi‐steels with different austenite stabilities were examined. Dependent on stability, TRIP‐effect TWIP‐effect found. A low stability causes a distinctive formation of α'‐martensite therefore strong strain hardening. The increase rate leads an in yield strength...
Abstract Stress‐Temperature‐Transformation (STT) and Deformation‐Temperature‐Transformation (DTT) diagrams are suitable to characterize the TRIP (transformation‐induced plasticity) TWIP (twinning‐induced effect in steels. The triggering stresses for deformation‐induced microstructure transformation processes, characteristic temperatures, yield stress strength of steel plotted STT diagram as functions temperature. elongation values austenite, strain‐induced twins martensite formations shown...
High alloyed metastable austenitic or austenitic-martensitic steels show a strain induced formation of martensite during mechanical loading.These kinds are well known as material for rolled products.Based on the System Fe-Cr-Mn-Ni new generation cast with TRIP effect will be discussed.The investigations how properties and fraction formed influenced by varying Ni contents.The in state quite similar to those state.This is valid tensile compression loading.Under certain conditions, an...
Abstract Weltweit verstärken sich die Bemühungen bei der Suche nach kostengünstigen austenitischen Stahlgüten mit hohem Energieabsorptionsvermögen. Dabei zeichnen verschiedene Forschungsrichtungen ab, auf Stähle TRIP‐, TWIP‐ und SBIP‐Effekt 1) oder entsprechenden Kombinationen konzentrieren. Am Institut für Eisen‐ Stahltechnologie TU Bergakademie Freiberg werden nichtrostende austenitische austenitisch‐martensitische Leichtbaustähle Kaltumform‐ Energieabsorptionsvermögen entwickelt im...
Metastable austenitic steels show excellent mechanical properties, such as high strength combined with ductility and toughness due to martensitic transformation under loading (transformation induced plasticity effect). A good energy consumption, and, in the case of high-alloyed metastable steels, a corrosion resistance, increase potential these materials for diverse applications, also regard safety requirements. Up now, numerous wrought alloys were investigated concerning behaviour,...
Abstract In the last years new Cr‐Mn‐Ni‐TRIP/TWIP steels have been developed at Institute of Iron and Steel Technology, Freiberg University Mining Technology. Within Collaborative Research Center SFB 799, ZrO 2 ‐ceramic‐TRIP‐steel composite materials are produced using infiltration open foam ceramics with liquid steel powder metallurgy small additions ceramic before sintering. The thermophysical properties play an important role in both production routes. They affect efficiency one process...
Abstract Stress‐Temperature‐Transformation (STT) and Deformation‐Temperature‐Transformation (DTT) diagrams are well‐suited to characterize the TRIP (transformation‐induced plasticity) TWIP (twinning‐induced effect in steels. The triggering stresses for deformation‐induced microstructure transformation processes, characteristic temperatures, yield stress strength of steel plotted STT diagram as functions temperature. elongation values austenite, strain‐induced twins martensite formations...
Journal Article Justice Perception in Times of Transition: Trends Germany, 1991–2006 Get access Jean-Yves Gerlitz, Gerlitz Search for other works by this author on: Oxford Academic Google Scholar Kai Mühleck, Mühleck Percy Scheller, Scheller Markus Schrenker European Sociological Review, Volume 28, Issue 2, April 2012, Pages 263–282, https://doi.org/10.1093/esr/jcq062 Published: 02 December 2010 history Received: 01 2009
In the first part of present study, relation between dimension free critical capillary number Ca* and material Λ are introduced as a stability criteria for slag entrainment at steel/slag interface. With knowledge thermophysical properties immiscible liquids in contact, values function could be estimated. The interfacial tension was investigated 1823 K carbon Cr–Ni steels contact with ternary slags containing CaO, SiO2, Al2O3, MgO TiO2 using drop weight method. apparent CaO–SiO2–TiO2 systems...
Abstract The efficiency of ladle heating can be substantially improved by preheating the combustion air using waste gas, oxygen enriching air, or changing ratio. These actions lead to an increase temperature and a decrease gas volume rate. Hence knowledge flow conditions in is decisive importance for further reduction commercial CFD-code (Computational Fluid Dynamic) Fluent 6.3 was used model ladle. thermodynamic software FactSage 5.3 chemical processes such as temperature, composition...
Abstract Mass exchange between liquid steel and the mould flux leads to oxidation of some elements in reduction slag components. In continuous casting process, where metal initially solidifies at metal‐slag interface, reaction products generated there can be cached by growing solidification front. The disruptions interface promote entrapment particles additionally. They cause surface defects with quality damages cast as a consequence. These investigations are focused on contact area metal....
Today continuous casting is the state of art in industrial processes.The powder used fulfill various tasks such as preventing air contact, absorbing non-metallic inclusions from liquid steel, providing lubrication between strand shell and mould wall controlling heat transfer.The contact with steel surface forms a slag layer.The jet submerged entry nozzle reflected at forming lower upper flow pattern.The moves along steel-slag interface generates shear stress waves.Viscosityand...
AbstractAbstractCasting powders melt on the surface of liquid metal forming a slag layer. Samples taken during casting revealed convective flows in flux layer and mass exchange with metal. It is demonstrated that concentrations certain elements are considerably higher at phase boundary than bulk phase. Disturbances interfacial tension produced by charge transfer evidently cause strong shearing forces which act parallel boundary. These induce movements flow Convective next to interface...
Abstract Process models and modelling of the fundamental relationships between process parameters material properties are significant for automation. Examples taken from liquid steel treatment, casting solidification also microstructure formation thermal influence its show practice oriented individual processing steps in manufacturing steel. Modelling is based both on physical chemical principles data‐based methods. The used data own empirical investigations as well selected published which...
Citizenship initiative seeks to address the environmental, social economic, and ethical challenges faced in our business which are important diverse stakeholder groups.
Abstract Three differently alloyed austenitic FeMn(Cr) steels have been examined with a focus on the occurrence of ∊ martensite. Studies primarily detection martensite by means metallographic and X-ray methods as well dilatometric DSC measurements. Dilatometric measurements also carried out to determine formation dissolution temperatures. Examination results including thermodynamic calculations serve characterize in steels.