Abstract
Mechanical properties of TLP-bonded joints of Ni-base single crystal superalloy, CMSX-2 were investigated using MBF -80 and F-24 insert metals. CMSX-2 was bonded at 1523-1548 K for 1.5-1.8 ks in vacuum. The (100) orientation of bonded specimen was aligned perpendicular to the joint interface. The tensile strength of the joints at elevated temperatures was equal to or greater than that of base metal in the range of testing temperature between 923 K and 1173 K. The creep rupture strength and rupture lives of the joints were the almost identical to ones of the base metal. The low cycle fatigue properties of the joints were also the same level as those of base metal. SEM observation of the fracture surfaces of joints after tensile test revealed that the fracture surfaces indicated the similar morphologies each other, and that the fracture of joints occurred in the base metal in any cases.
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