Phase-structural transformations in the RAF/M, F/M and model F/ODS steels exposed to lithium - corrosion induced coarsening of substructure and effect of alloying elements
The corrosion behaviour of RAF/M RUSFER-EK-181 and F/M (EP-823, SUS410) steels was investigated in
static ‘‘pure” (0.004 wt.% N) and N-added Li (0.5 wt.% N) at 600C up to 750 h. The weight losses of sam-ples increased with time and nitrogen content in Li. The corrosion-assisted coarsening was observed in
the near-surface layers of RAF/M steels. It is caused by the dissolution of Cr and decomposition of car-bides during exposure to both melts. The coarsening mechanism and the influence of alloying on the
structural and compositional transformations in steels exposed to Li are discussed.
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