Mathematical modeling of microsegregation in binary metallic alloys

Autor:	Thomas P. Battle, Robert D. Pehlke
Rok vydání:	1990
Předmět:	Liquid metal Chemistry Method of lines Metals and Alloys Non-equilibrium thermodynamics Binary number Thermodynamics Condensed Matter Physics Metallic alloy Mechanics of Materials Mass transfer visual_art Heat transfer Materials Chemistry Aluminium alloy visual_art.visual_art_medium
Zdroj:	Metallurgical Transactions B. 21:357-375
ISSN:	2379-0229 0360-2141
Popis:	A mathematical model was developed to calculate microsegregation in binary metallic alloys. This model utilized the mathematical techniques of the method of lines combined with invariant imbedding (MOL/II) to solve the problem of combined heat and mass transfer during and after solidification. Model predictions were compared to experimental measurements in the Al-Cu system and to other microsegregation models. The MOL/II model predicted nonequilibrium second-phase contents within ±3 pct at low and intermediate cooling rates, when dendrite-arm coarsening was included in the model. It also was able to reproduce concentration profiles reasonably well. The analytical models commonly used (equilibrium cooling, Scheil equation, Brody/ Flemings model, Clyne/Kurz model, Solari/Biloni model, and Basaran equation) in micro-segregation calculations were shown to be considerably less accurate than the numerical models (MOL/II and the Ogilvy/Kirkwood model).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::7641c7e77f441c50fcf1ac1dd49823ca https://doi.org/10.1007/bf02664204 Zobrazit plný text záznamu