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Macrosegregation in ternary systems
Author(s) -
Zhong Zengyong,
Oeters Franz
Publication year - 1985
Publication title -
steel research
Language(s) - English
Resource type - Journals
eISSN - 1869-344X
pISSN - 0177-4832
DOI - 10.1002/srin.198500648
Subject(s) - ternary operation , mixing (physics) , mass transfer , manganese , metallurgy , carbon fibers , binary number , thermodynamics , temperature gradient , ternary numeral system , chemistry , materials science , composite material , physics , arithmetic , mathematics , quantum mechanics , composite number , computer science , programming language
The paper presents a theoretical approach to the macrosegregation in ternary systems caused by mixing in the liquid bulk melt. Contrary to binary alloys, at least two concentration gradients exist in the heterogeneous solid‐liquid zone of solidifying ternary alloys. The corresponding temperature gradients are called the partial temperature gradients. The concept of these partial temperature gradients permits to calculate the segregation of the dissolved elements. Experiments were carried out with iron‐carbon‐manganese and iron‐carbon‐sulphur alloys in a unidirectional solidification device. The results are in good agreement with the theoretical calculations if the additional mass transfer from the interdendritic melt into the bulk liquid is taken into account in the same way as was done with binary alloys. The way by which the dissolved elements mutually influence each other is discussed.