Le comportement de transformation dynamique de l'austénite déformée a été étudié dans quatre aciers à teneur en carbone croissante qui avaient été déformés sur la plage de température 743 - 917°C. Des souches de 0,15 à 5 ont été appliquées à des taux de déformation de 0,4 à 4,5 s-1. Les structures observées sont de forme Widmanstätten et semblent avoir nucléé de manière déplacée. Les débuts de transformation dynamique et de recristallisation dynamique ont été détectés dans les quatre aciers en utilisant la méthode de double différenciation. Deux ensembles de minima de dérivée seconde ont été associés à toutes les courbes d'écoulement. Les contraintes d'écoulement moyennes (MFS) relatives à chaque condition expérimentale ont été calculées. Les températures de chute de contrainte se situent à environ 40 °C au-dessus du paraéquilibre. Ce type de comportement est attribué à la survenue de la transformation dynamique de l'austénite en ferrite lors de la déformation. L'effet de la déformation sur l'énergie Gibbs de l'austénite dans ces aciers a été estimé. Le travail devrait être utile pour les ingénieurs travaillant dans les moulins à bandes chaudes des industries sidérurgiques et également à la communauté scientifique qui se consacre au domaine des simulations thermo-mécaniques dans les métaux et les matériaux.
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Vendeur : BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, Allemagne
Taschenbuch. Etat : Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The dynamic transformation behavior of deformed austenite was studied in four steels of increasing carbon contents that had been deformed over the temperature range 743 917°C. Strains of 0.15 5 were applied at strain rates of 0.4 - 4.5 s-1. The structures observed are Widmanstätten in form and appear to have nucleated displacively. The onsets of dynamic transformation and dynamic recrystallization were detected in the four steels using the double-differentiation method. Two sets of second derivative minima were found to be associated with all the flow curves. The mean flow stresses (MFS s) pertaining to each experimental condition were calculated. The stress drop temperatures are shown to be about 40°C above the paraequilibrium. This type of behavior is ascribed to the occurrence of the dynamic transformation of austenite to ferrite during deformation. The effect of deformation on the Gibbs energy of austenite in these steels was estimated. The work should be useful for the engineers working in the hot strip mills of steel industries and also to the scientific community who are dedicated in the area of thermo-mechanical simulations in metals and materials. 176 pp. Englisch. N° de réf. du vendeur 9783639702446
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Vendeur : moluna, Greven, Allemagne
Etat : New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Autor/Autorin: Ghosh ChiradeepDr. Chiradeep Ghosh is currently a researcher at Research and Development department of Tata Steel, Jamshedpur, India. He obtained his Ph.D. from McGill University, Montreal, Quebec, Canada. Till date he has published . N° de réf. du vendeur 4998715
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Vendeur : AHA-BUCH GmbH, Einbeck, Allemagne
Taschenbuch. Etat : Neu. nach der Bestellung gedruckt Neuware - Printed after ordering - The dynamic transformation behavior of deformed austenite was studied in four steels of increasing carbon contents that had been deformed over the temperature range 743 917°C. Strains of 0.15 5 were applied at strain rates of 0.4 - 4.5 s-1. The structures observed are Widmanstätten in form and appear to have nucleated displacively. The onsets of dynamic transformation and dynamic recrystallization were detected in the four steels using the double-differentiation method. Two sets of second derivative minima were found to be associated with all the flow curves. The mean flow stresses (MFS s) pertaining to each experimental condition were calculated. The stress drop temperatures are shown to be about 40°C above the paraequilibrium. This type of behavior is ascribed to the occurrence of the dynamic transformation of austenite to ferrite during deformation. The effect of deformation on the Gibbs energy of austenite in these steels was estimated. The work should be useful for the engineers working in the hot strip mills of steel industries and also to the scientific community who are dedicated in the area of thermo-mechanical simulations in metals and materials. N° de réf. du vendeur 9783639702446
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Vendeur : Books Puddle, Woodside, NY, Etats-Unis
Etat : New. pp. 176. N° de réf. du vendeur 26126897014
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Vendeur : Majestic Books, Hounslow, Royaume-Uni
Etat : New. Print on Demand pp. 176 2:B&W 6 x 9 in or 229 x 152 mm Perfect Bound on Creme w/Gloss Lam. N° de réf. du vendeur 132641961
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Vendeur : Biblios, Frankfurt am main, HESSE, Allemagne
Etat : New. PRINT ON DEMAND pp. 176. N° de réf. du vendeur 18126897020
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Vendeur : Mispah books, Redhill, SURRE, Royaume-Uni
Paperback. Etat : Like New. LIKE NEW. SHIPS FROM MULTIPLE LOCATIONS. book. N° de réf. du vendeur ERICA75836397024416
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Vendeur : buchversandmimpf2000, Emtmannsberg, BAYE, Allemagne
Taschenbuch. Etat : Neu. This item is printed on demand - Print on Demand Titel. Neuware -The dynamic transformation behavior of deformed austenite was studied in four steels of increasing carbon contents that had been deformed over the temperature range 743 - 917°C. Strains of 0.15 - 5 were applied at strain rates of 0.4 - 4.5 s-1. The structures observed are Widmanstätten in form and appear to have nucleated displacively. The onsets of dynamic transformation and dynamic recrystallization were detected in the four steels using the double-differentiation method. Two sets of second derivative minima were found to be associated with all the flow curves. The mean flow stresses (MFS's) pertaining to each experimental condition were calculated. The stress drop temperatures are shown to be about 40°C above the paraequilibrium. This type of behavior is ascribed to the occurrence of the dynamic transformation of austenite to ferrite during deformation. The effect of deformation on the Gibbs energy of austenite in these steels was estimated. The work should be useful for the engineers working in the hot strip mills of steel industries and also to the scientific community who are dedicated in the area of thermo-mechanical simulations in metals and materials.OmniScriptum SRL, Str. Armeneasca 28/1, office 1, 2012 Chisinau 176 pp. Englisch. N° de réf. du vendeur 9783639702446
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