Abstract
In this work, Ti–Ni based in situ metal intermetallic laminates (MILs) were prepared and the various intermetallic phases formed were analyzed. Solid state diffusion bonding technique was adopted to produce transition joints between commercially pure Ti and Ni sheets of thickness 0.5 and 0.2 mm respectively at three different temperatures such as 770, 800 and 850 °C for various bonding duration. Microstructural characterization and phase analysis along the cross section of the bonded samples revealed the presence of three different intermetallic phases namely Ti2Ni, TiNi and TiNi3. Quasi static compression tests carried out on the MILs along the parallel and perpendicular direction revealed that the strength of the MILs increased with increase in total intermetallic layer thickness. The fractographs taken on fracture surface revealed that the failure of the MILs was mainly due to the formation of brittle cracks and de-bonding in the intermetallic layers. However, the metallic layers added strength to the MILs.
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