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- W2058578107 abstract "By the use of a first principles density functional theory, two kinds of models, namely the Rice–Wang thermodynamics model and the Seah quasi-chemical model, are employed to evaluate the embrittling tendency of a grain boundary (GB) due to the 3d element segregation. The first principles method based on those two models is appropriate for calculating the chemical and structural relaxation contributions to the changes of GB cohesion with the 3d segregants. The effects of the 3d transition elements, such as Ti, V, Cr and Mn, on a stable fcc Fe GB are studied and the difference between these two models is interpreted. When the chemical and the structural relaxation effects are taken into account, the calculated results for these two models are coincident for most of the elements studied, except for chromium. After analysing their chemical bonding in detail, we find that this discrepancy may be attributable to a lower susceptibility of the Seah model to the bonding anisotropy caused by Cr in the GB. It is proposed that the Seah model should be prudently used for some elements, especially those lying in the middle of a transition period." @default.
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- W2058578107 date "2003-11-25" @default.
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- W2058578107 title "The effects of 3d alloying elements on grain boundary cohesion in -iron: a first principles study on interface embrittlement due to the segregation" @default.
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- W2058578107 doi "https://doi.org/10.1088/0953-8984/15/49/012" @default.
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