Quantitative Dilatometric Analysis of the Isothermal Decomposition of Hypereutectoid Fe–C Austenite
-
Chun-Ming Li
and
Eric J Mittemeijer
Abstract
The specific volume changes due to isothermal decomposition of hypereutectoid Fe–C austenite into cementite and carbon depleted austenite above the A1 temperature, and into ferrite and cementite below the A1 temperature, have been calculated quantitatively, using lattice parameter data as function of carbon content and temperature for the phases involved. Corresponding dilatometric experiments have been performed. The measured relative length changes by isothermal decomposition of austenite in Fe–C alloys of different carbon content, above and below the A1 temperature, are in good agreement with the calculated results if a slightly modified set of lattice constants for cementite is used.
Abstract
Die Volumenanderungen bei isothermer Umwandlung von ubereutektoidischem Fe–C–Austenit – oberhalb der eutektoiden A1-Temperatur in Zementit und an Kohlenstoff angereichertem Austenit sowie anschlieBend unterhalb A1 in Ferrit und Zementit – wurden mit Gitterkonstanten der beteiligten Phasen als Funktion des Kohlenstoffgehalts und der Temperatur berechnet. Entsprechende dilatometrische Untersuchungen wurden durchgefuhrt. Die gemessenen relativen Langenanderungen bei isothermer Umwandlung von Austenit mit unterschiedlichem Kohlenstoffgehalt ober- und unterhalb Ax stimmen mit den berechneten Ergebnissen gut uberein, wenn die Gitterparameter des Zementits etwas verandert werden.
The authors are indebted to Mr H. Kummer and Mr H. Mozaffari and to Dr H. J. Seifert for their kind help in the dilatometric experiments.
Literature
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© 2001 Carl Hanser Verlag, München
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- Instructions to Authors/Hinweise für Autoren
- Instructions to authors
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Buchbesprechung
- Tagungskalender
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Aufsätze
- Metalle und Zeit – eine oft vergessene Problematik
- Precipitate Size Distribution in Alloys with and without Lattice Misfit
- The Ternary Ga–Ni–Sb System: Invariant Reactions and Liquidus Surface
- Thermodynamic Calculation of Al-Gd and Al-Gd-Mg Phase Equilibria Checked by Key Experiments
- Assessment of Diffusional Mobilities of Cr, Ni, and Si in fcc Cr–Ni–Si Alloys
- Quantitative Dilatometric Analysis of the Isothermal Decomposition of Hypereutectoid Fe–C Austenite
- The Excess Enthalpies of Liquid Ag-Sb-Te and Ag-Bi-Te Alloys
- Temperature Dependent Surface Tension of Binary Alloys: A Simple Model
- Micro-hardness Measurements to Evaluate Composition Gradients in Metal-Based Functionally Graded Materials
- Temperature Dependence of Lattice Parameter, Misfit and Thermal Expansion Coefficient of Matrix, γ′ Phase and Superalloy
- Einfluss der Umformgeschwindigkeit und -temperatur auf die Versagensgrenze von Aluminium AA7075
- Phenomenological and Microscopical Description of Scattering on Different Dislocation Arrangements
- Creep and Dislocation Structure in Copper Single Crystals Compressed in Directions [010], [110] and [111]
- Analysis of Average Orientation Distribution in Sheet Materials with Through-Thickness Texture Gradient
- Instructions to Authors/Hinweise für Autoren
- Instructions to authors
- Mitteilungen der Deutschen Gesellschaft für Materialkunde e.V.
- Personen
- Buchbesprechung
- Tagungskalender
