Effect of thermal and thermochemical treatments on the structure of Fe-Ni submicrocrystalline electrodeposited multilayer materials

The effects of annealing, carburization, and quenching on the structural changes in a mulilayer Fe-Ni material fabricated by electrolytic deposition from aqueous electrolytes have been studied. The thermal stability of this structure is shown to be identical to that of the related materials produced by severe plastic deformation. When an interstitial element with different affinities to the base components is added to the composite material under study, the diffusion rate of its metallic atoms (including those that are not involved in the formation of interstitial phases) decreases. In the quenched composites, the morphological type of martensite in ironbased layers is determined by the content of alloying elements (carbon, nickel), as in the corresponding bulk materials.