Grain boundary segregation of elements of groups 14 and 15 and its consequences for intergranular cohesion of ferritic iron

摘要: The experimentally determined data—enthalpy and entropy—of the grain boundary segregation of substitutional solutes 14th 15th groups periodic table, i.e., silicon, phosphorus, tin, antimony, in α-iron are compared. consequences these elements for intergranular strengthening or embrittlement also shown. It is documented that all except silicon segregate at boundaries interstitially enhanced temperatures although preferred zero K. Despite some variations, values strengthening/embrittling Gibbs energy nearly linearly dependent on differences sublimation energies host solute.