The segregation of As,Sb and Bi in Cr-Ni steels and alloys with different Ni contents investigated using AES |
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Authors: | Milan Koutník Václav Landa Vladimír ?íhal |
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Institution: | (1) National Research Institute for Materials, Opletalova 25, CS-113 12 Praha 1, Czechoslovakia;(2) National Research Institute of Material Protection, B chovice, CS-190 11 Praha 9, Czechoslovakia |
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Abstract: | This paper reports on an AES study of grain boundary segregation in five kinds of Cr-Ni corrosion-resistant steels and alloys with different Ni contents that were enriched by As, Sb or Bi. The results show that all mentioned impurities segregate to the grain boundaries and that the segregation level depends on the type of the impurity. The highest amount of segregant atoms was found in the case of Bi, while it appeared to be substantially lower for As and Sb. The segregation level of each impurity grows also with the Ni content. This increase is more pronounced for Bi and Sb than for As. In particular the results demonstrate that the enrichment of grain boundaries by a given impurity is strongly connected to the solubility of this element in the matrix.Dedicated to Professor Günther Tölg on the occasion of his 60th birthday |
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Keywords: | Cr-Ni steel impurity segregation Auger electron spectroscopy grain boundary |
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