Publication detail

Grain Boundary Segregation of Elements of Groups 14 and 15 and its Consequences for Intergranular Cohesion of Ferritic Iron

LEJČEK, P. ŠANDERA, P. HORNÍKOVÁ, J. ŘEHÁK, P. POKLUDA, J.

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

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