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Original Title: Grain Boundary Segregation of Elements of Groups 14 and 15 and its Consequences for Intergranular Cohesion of Ferritic Iron
English Title: Grain Boundary Segregation of Elements of Groups 14 and 15 and its Consequences for Intergranular Cohesion of Ferritic Iron
Author(s): LEJČEK, P.; ŠANDERA, P.; HORNÍKOVÁ, J.; ŘEHÁK, P.; POKLUDA, J.
Type: journal article
Language: en
Original Abstract: The experimentally determined data—enthalpy and entropy—of the grain boundary segregation of substitutional solutes of 14th and 15th groups of the periodic table, i.e., silicon, phosphorus, tin, and antimony, in a alpha-iron are compared. The consequences of the grain boundary segregation of these elements for the intergranular strengthening or embrittlement are also shown. It is documented that all these solutes except silicon segregate at the grain boundaries interstitially at enhanced temperatures although substitutional segregation is preferred at zero K. Despite some variations, the values of the strengthening/embrittling Gibbs energy of all solutes are nearly linearly dependent on the differences in the sublimation energies of the host and solute.
English abstract: The experimentally determined data—enthalpy and entropy—of the grain boundary segregation of substitutional solutes of 14th and 15th groups of the periodic table, i.e., silicon, phosphorus, tin, and antimony, in a alpha-iron are compared. The consequences of the grain boundary segregation of these elements for the intergranular strengthening or embrittlement are also shown. It is documented that all these solutes except silicon segregate at the grain boundaries interstitially at enhanced temperatures although substitutional segregation is preferred at zero K. Despite some variations, the values of the strengthening/embrittling Gibbs energy of all solutes are nearly linearly dependent on the differences in the sublimation energies of the host and solute.
Keywords: grain boundary; segregation; sublimation energie; ferritic iron
Released: 01.05.2017
Pages from: 5822
Pages to: 5834
Pages count: 13