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Abstract To meet the requirement of different properties at different location within one component, a thin wall from GH163/Rene95 nickel based dual-alloy is fabricated by laser direct deposition. Microstructure and the interface between these two alloys of the deposited materials are characterized in detail. The results indicates that, epitaxial directional solidification microstructure is obtained for both alloys along the building-up direction, which passes through the interface of the dual-alloy. And there is no clear interface between these two alloys. Microhardness tests show that there existes a transition region, with which hardness changed smoothly. The interface bonding strength of the dual-alloy is higher than that for as-deposited GH163 alloy, which is about 800 MPa.
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