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A SIMS and TEM investigation of the microstructure of wear‐resistant ductile cast iron
Author(s) -
Valle N.,
Martinez Celis M.,
Lacaze J.,
Thorbjornsson I. O.,
Johannesson B.,
Thorgrimsson J. T.
Publication year - 2013
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5119
Subject(s) - carbide , microstructure , materials science , metallurgy , transmission electron microscopy , cast iron , ductile iron , secondary ion mass spectrometry , tribology , ion , chemistry , nanotechnology , organic chemistry
The benefit of the presence of Cr containing inserts inside ductile iron on the tribological properties of these materials has been recently demonstrated. In order to understand these improved properties, a secondary ion mass spectrometry (SIMS) and transmission electron microscopy investigation of these wear‐resistant ductile cast irons has been performed. The results indicate that the principal change in the microstructure induced by inserts occurs in the inserts and in their surroundings where the formation of carbides with different sizes and compositions is observed: M 3 C, M 7 C 3 and M 23 C 6 (M stands for Fe and/or Cr). These are not pure binary carbides since among the different elements studied by SIMS, Cr, Fe, Mn and, to a lesser extent, Ni are soluble in these carbides. Copyright © 2012 John Wiley & Sons, Ltd.