Chemical composition of chosen phase constituents in austempered ductile cast iron
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Małgorzata Warmuzek
Abstract
A procedure a for multi-step characterization of microstructural features observed in austempered ductile cast iron (ADI), was proposed based on the results of microscopic examinations, a local X-ray microanalysis and EBSD-based crystallographic evaluation. The polyphase complex microregions having an increased content of alloying elements such as Mo, Cr, Mn in comparison with that estimated for the alloy's matrix, were observed in the examined material. As a first step, a classification of microregions was performed based on their morphology and specific distribution in the alloy's microstructure. Subsequently, by using established criteria for the selection of microanalysis data for a further microregions discrimination, several groups of particles characterized by a particular ratio of the alloying elements, were distinguished. The particles were classified based on the specific range of the carbide stabilizers concentration revealed, then were ascribed in situ to two types of carbides identified by means of EBSD analysis. Furthermore, the effect of heat treatment conditions on the evolution of the chemical composition of the microregions was examined experimentally and discussed.
Kurzfassung
In dem vorliegenden Beitrag wird eine Prozedur für die mehrstufige Charakterisierung der mikrostrukturellen Merkmale in duktilem Gusseisen (ADI) vorgeschlagen, die auf den Ergebnissen mikroskopischer Untersuchungen, lokaler Röntgenmikroanalyse und EBSD-basierter kristallografischer Evaluation basieren. In dem untersuchten Werkstoff wurden mehrphasige komplexe Mikroregionen mit einem zunehmenden Gehalt an Legierungselementen, wie Mo, Cr, Mn, im Vergleich zu dem Anteil, wie er für die Legierungsmatrix abgeschätzt wurde, beobachtet. Im ersten Schritt wurde eine Klassifizierung der Mikroregionen basierend auf ihrer Morphologie und ihrer spezifischen Verteilung in der Mikrostruktur der Legierung ausgeführt. Indem die etablierten Kriterien für die Selektion der Mikroanalysedaten für die weitere Mikrostrukturunterscheidung herangezogen wurden, wurden anschließend mehrere Gruppen von Partikeln charakterisiert und anhand des spezifischen Verhältnisses an Legierungselementen unterschieden. Die Partikel wurden anhand des bestimmten Konzentrationsbereiches an Karbidstabilisierern klassifiziert und dann in-situ zwei Typen von Karbiden zugeschrieben, die mittels EBSD-Analyse identifiziert wurden. Darüber hinaus wurde die Auswirkung der Wärmebehandlungsbedingungen auf die Entwicklung der chemischen Zusammensetzung der Mikroregionen experimentell untersucht und diskutiert.
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© 2018, Carl Hanser Verlag, München
Artikel in diesem Heft
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- An investigation of the crash performance of magnesium, aluminum and advanced high strength steels and different cross-sections for vehicle thin-walled energy absorbers
- Model-based correlation between change of electrical resistance and change of dislocation density of fatigued-loaded ICE R7 wheel steel specimens
- Tensile strength of 3D printed materials: Review and reassessment of test parameters
- Numerical calculation of stress concentration of various subsurface and undercutting pit types
- Chemical composition of chosen phase constituents in austempered ductile cast iron
- Investigation of initial yielding in the small punch creep test
- Optimization and characterization of friction surfaced coatings of ferrous alloys
- Influence of the milling process on TiB2 particle reinforced Al-7 wt.-% Si matrix composites
- In-situ compaction and sintering of Al2O3 – GNP nanoparticles using a high-frequency induction system
- Strain-rate controlled Gleeble experiments to determine the stress-strain behavior of HSLA steel S960QL
- Thermography using a 1D laser array – From planar to structured heating
- Schichtdickenbestimmung von Oberflächenschutzsystemen für Beton mit Impulsthermografie
- Microstructure and mechanical properties of fly ash particulate reinforced AA8011 aluminum alloy composites
- High temperature compressive behavior of three-dimensional five-directional braided composites
- Dry sliding behavior of the aluminum alloy 8011 composite with 8 % fly ash
- Review on nanostructures from catalytic pyrolysis of gas and liquid carbon sources
Artikel in diesem Heft
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- An investigation of the crash performance of magnesium, aluminum and advanced high strength steels and different cross-sections for vehicle thin-walled energy absorbers
- Model-based correlation between change of electrical resistance and change of dislocation density of fatigued-loaded ICE R7 wheel steel specimens
- Tensile strength of 3D printed materials: Review and reassessment of test parameters
- Numerical calculation of stress concentration of various subsurface and undercutting pit types
- Chemical composition of chosen phase constituents in austempered ductile cast iron
- Investigation of initial yielding in the small punch creep test
- Optimization and characterization of friction surfaced coatings of ferrous alloys
- Influence of the milling process on TiB2 particle reinforced Al-7 wt.-% Si matrix composites
- In-situ compaction and sintering of Al2O3 – GNP nanoparticles using a high-frequency induction system
- Strain-rate controlled Gleeble experiments to determine the stress-strain behavior of HSLA steel S960QL
- Thermography using a 1D laser array – From planar to structured heating
- Schichtdickenbestimmung von Oberflächenschutzsystemen für Beton mit Impulsthermografie
- Microstructure and mechanical properties of fly ash particulate reinforced AA8011 aluminum alloy composites
- High temperature compressive behavior of three-dimensional five-directional braided composites
- Dry sliding behavior of the aluminum alloy 8011 composite with 8 % fly ash
- Review on nanostructures from catalytic pyrolysis of gas and liquid carbon sources
