Experimental Analysis of Partition Coefficient in Al-Mg Alloys
سال انتشار: 1393
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 526
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شناسه ملی سند علمی:
IIAC03_067
تاریخ نمایه سازی: 9 فروردین 1395
چکیده مقاله:
As 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 6.7 and 10.2 wt-% Mg were melted and solidified in a DTA furnace capable of quenching samples during solidification. Cooling rates of 0.5 and 5 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 concentrationprofiles than the equilibrium calculations
کلیدواژه ها:
نویسندگان
M.H Avazkonandeh-Gharavol
Department of Materials Science and Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, P.O. Box: 91775-1111, Iran
m Haddad-Sabzevar
Department of Materials Science and Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, P.O. Box: 91775-1111, Iran
h Fredriksson
Department of Materials Science and Engineering, Royal Institute of Technology (KTH), Brinellvägen 23, 100 44 Stockholm, Sweden