EXPERIMENTALl ANALYSIS OF PARTITION COEFFICIENT IN Al-Mg ALLOYS
- سال انتشار: 1395
- محل انتشار: مجله علم مواد و مهندسی ایران، دوره: 13، شماره: 2
- کد COI اختصاصی: JR_IJMSEI-13-2_008
- زبان مقاله: انگلیسی
- تعداد مشاهده: 194
نویسندگان
Department of Materials and Polymer Engineering, Faculty of Engineering, Hakim Sabzevari University, Sabzevar, Iran
Department of Materials Science and Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, P.O. Box: ۹۱۷۷۵-۱۱۱۱, Iran
Department of Materials Science and Engineering, Royal Institute of Technology (KTH), Brinellvägen ۲۳, ۱۰۰ ۴۴ Stockholm, Sweden
چکیده
Because the partition coefficient is one of the most important parameters affecting microsegregation, the aim of this research is to experimentally analyse the partition coefficient in Al-Mg alloys. In order to experimentally measure the partition coefficient, a series of quenching experiments during solidification were carried out. For this purpose binary Al-Mg alloys containing ۶.۷ and ۱۰.۲ wt-% Mg were melted and solidified in a DTA furnace capable of quenching samples during solidification. Cooling rates of ۰.۵ and ۵ K/min were used and samples were quenched from predetermined temperatures during solidification. The fractions and compositions of the phases were measured by quantitative metallography and SEM/EDX analyses, respectively. These results were used to measure the experimental partition coefficients. The resultant partition coefficients were used to model the concentration profile in the primary phase and the results were compared with equilibrium calculations and experimental profiles. The results of calculations based on the experimental partition coefficients show better consistency with experimental concentration profiles than the equilibrium calculations.کلیدواژه ها
Partition Coefficient, Microsegregation, Al-Mg Alloys, Differential Thermal Analysisاطلاعات بیشتر در مورد COI
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