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铁素体钢的一个普遍问题是周期表中ⅣA族,ⅤA族痕量杂质元素的偏聚,引起晶界结合强度降低。这种偏聚导致有如可逆回火脆性产生的机械性能恶化,也促进铁素体钢对环境引起开裂过程的敏感性。长期以来,从们认为钢的脆性因某些元素的存在而增加,这些元素是Ni,Cr或Mn。用俄歇谱(AES)作的测量已证实了合金元素和杂质元素以特定的组合共偏聚(Cosegregate)在界面上,例如Ni+Sn,Ni+Sb,Cr+P。这些观测结果可由Guttman
A common problem with ferritic steels is the segregation of trace amounts of IVA and VA impurity elements in the periodic table, resulting in a decrease in the grain boundary bond strength. This segregation causes degradation of mechanical properties such as reversible temper embrittlement and also promotes susceptibility of ferritic steels to environmental cracking. For a long time, it has been suggested that the brittleness of steels is increased by the presence of certain elements, such as Ni, Cr or Mn. Measurements with Auger spectroscopy (AES) have demonstrated that alloying and impurity elements are co-segregated at specific interfaces such as Ni + Sn, Ni + Sb, Cr + P at specific combinations. These observations can be made by Guttman