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The structure and adhesion of oxide scales on FeNiMo and FeCrMo alloys
Author(s) -
Rolls R.,
Arnold F. V.
Publication year - 1972
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19720231007
Subject(s) - alloy , materials science , oxide , metal , metallurgy , adhesion , layer (electronics) , oxygen , composite material , chemistry , organic chemistry
The Structure and Adhesion of Oxide Scales on FeNiMo and FeCrMo Alloys A preliminary study has been made of the structure and adhesion of oxide scales formed on Fe‐1.8 wt.% Ni‐0.3wt.% Mo and Fe‐1wt.% Cr‐0.5wt.% Mo in oxygen at 930°–1250°C. From 930°–1250°C, the FeNiMo alloy oxidised at a slower rate that the FeCrMo alloy, and both alloys oxidised at a slower rate than high‐purity iron. Hot bend tests and hot tensile tests of a scale‐metal joint revealed that the scales comprised a strongly adherent inner layer (enriched in CrMo or Ni) and a weakly coherent bulk structure. In the FeNiMo alloy, failure in the bulk scale occured along a smooth plane at the edge of the Ni‐enrichment zone whereas in contras, for the FeCrMo alloy, failure occured withing the CrMo enriched zone adjacent to the scale‐metal interface.