Microstructural Evolution and Mechanical Properties of Ti2AlNb/GH99 Superalloy Brazed Joints Using TiZrCuNi Amorphous Filler Alloy

Dissimilar materials brazing of Ti2AlNb alloy to GH99 superalloy is great pragmatic importance in the aerospace field, especially lightweight space aircraft components manufacturing. In this work, TiZrCuNi amorphous filler was used as filler, and experiments were carried out at different temperatures times investigate changes interfacial structures properties joints. The typical microstructure alloy/B2/β/Ti2Ni (Al, Nb) + B2/β (Ti, Zr)2(Ni, Cu) Zr)(Ni, Cu)/(Cr, Ni, Ti) solid solution (Ni, Cr) solution/GH99 when being brazed 1000 °C for 8 min. joints influenced by diffusion reaction between parent metal. prolongation process parameters accelerated liquid into both metals, which eventually led aggregation brittle phase increased thickness Ti2Ni layer. According fracture analyses, cracks began spread with it well phase. that min had a maximum shear strength ~216.2 MPa. Furthermore, increasing temperature or extending holding time decreased due coarse continuous