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Nickel-based superalloy IN 713C powders have been consolidated by hot isostatic pressing (HIPing). The microstructure and mechanical properties of the superalloys were investigated at the HIPing temperature ranging from 1030 o C to 1230 o C. When the IN 713C powder was heated above γ' solvus temperature (about 1180 o C), the microstruc- ture was composed of the austenitic FCC matrix phase γ plus a variety of secondary phases, such as γ' precipitates in γ matrix and MC carbides at grain boundaries. The yield and tensile strengths of HIPed specimens at room temperature were decreased while the elongation and reduction of area were increased as the processing temperature increased. At 700 o C, the strength was similar regardless of HIPing temperature; however, the ductility was drastically increased with increasing the temperature. It is considered that these properties compared to those of cast products are originated from the homogeneity of microstructure obtained from a PM process.

Characterization of Hot Isostatically Pressed Ni-Based Superalloy IN 713C