Formation of the Diffusion Zone in Explosion Welded Composite Cr20Ni80 - AD1 at Liquid-Phase Interaction

The paper presents the investigation on the structure, chemical and phase composition of the diffusion coating formed during the liquid-phase heat treatment in the explosion-welded Cr20Ni80 + AD1 bimetal. It is shown that the coating structure consists of NiAl 3 , CrAl 7 , Ni 2 Al 3 intermetallic inclusions, as well as a metastable ternary compound – τ 2 -phase (Al 77.5 Cr 12.5 Ni 10 ) of different dispersion and morphology. There are no crystallization defects in the coating structure.