NON-EQUILIBRIUM SEGREGATION OF SOLUTE TO GRAIN BOUNDARIES

Abstract

Abstract: In consideration of the local equilibrium among vacancies,solute atoms and vacancy-solute atom complexes and the influence of equilibrium grain boundary segregation,theoretical dy- namic formulas for non-equilibrium grain boundary segregation of solute have been derived on the basis of the vacancy-dragging mechanism.Theoretical calculation by computer has been carried out for the non-equilibrium segregation of boron to austenitic grain boundaries during isothermal holding and continuous cooling after heating at high temperatures.The re- suits agree well with those obtained from experiments.

Key words: solute, boron, non-equilibrium segregation, grain boundary

CHU Youyi ZHANG Sanhong HE Xinlai KE Jun(T.Ko) University of Science and Technology Beijing,China CHU Youyi Professor,The Nonferrous Metals Society of China,Room 602,B12,Fuxing Road,Beijing 100814,China. NON-EQUILIBRIUM SEGREGATION OF SOLUTE TO GRAIN BOUNDARIES[J]. Acta Metallurgica Sinica (English Letters), 1990, 3(1): 40-45.

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NON-EQUILIBRIUM SEGREGATION OF SOLUTE TO GRAIN BOUNDARIES

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