Interfacial reaction in the tantalum-steel explosion weld composite at 1053 K

Abstract

The microstructure of the interface of the explosively welded tantalum-steel composite which had been subjected to heat treatment at 1053 K was investigated by using optical microscopy and electron probe micro-analysis. It was confirmed that a Ta₂C layer grew along the tantalum-steel interface. The carbon diffusion path at 1053 K, going through the γ-Fe, α-Fe, Ta₂C and α-Ta phase regions was identified and interpreted by means of the Fe-Ta-C equilibrium phase diagram assuming that local equilibrium is established at all the phase boundaries.

Keywords

tantalum-steel bond interface / microstructure / carbon activity / diffusion path

References

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