MECHANISM OF NON-EQUILIBRIUM SEGREGATION OF SOLUTE TO GRAIN BOUNDARIES

Acta Metall Sin

1989, Vol. 25

Issue (4): 41-47 DOI:

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MECHANISM OF NON-EQUILIBRIUM SEGREGATION OF SOLUTE TO GRAIN BOUNDARIES

CHU Youyi;ZHANG Sanhong;HE Xinlai;KE Jun T. Ko Beijing University of Science and Technology

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CHU Youyi;ZHANG Sanhong;HE Xinlai;KE Jun T. Ko Beijing University of Science and Technology. MECHANISM OF NON-EQUILIBRIUM SEGREGATION OF SOLUTE TO GRAIN BOUNDARIES. Acta Metall Sin, 1989, 25(4): 41-47.

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Abstract In consideration of the local equilibrium among vacancies, solute atomsand vacancy-solute atom complexes, and the influence of equilibrium grain bound-ary segregation, theoretical dynamic formulas for non-equilibrium grain boundarysegregation of solute have been derived on the basis of the vacancy-draggingmechanism. Theoretical calculation by computer has been carried out for the non-equilibrium segregation of B to austenitic grain boundaries during isothermal hold-ing and continuous cooling after heating at high temperatures. The results agree wellwith those obtained from experiments.

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

Received: 18 April 1989

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https://www.ams.org.cn/EN/ OR https://www.ams.org.cn/EN/Y1989/V25/I4/41

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