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Production and Characterization of Novel Superalloys by Powder Metallurgy Method
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In this study, nickel-based superalloys (Ni-Cr-Mo-Nb-Fe-Ti) with varied Ti contents have been produced by using mechanical alloying-powder metallurgy method for turbine blade material. Effect of Ti addition was investigated. Superalloy powders were prepared by mechanical alloying by using 6 mm zirconia balls for 20 hours at 400 rpm. Then, the powder mixtures were compacted at 400 MPa in a hydraulic press, and the green specimens were sintered at 1200 °C for 1 hour. Properties of the superalloys were studied by non-destructive eddy current test and ultrasonic test. Elastic modulus was characterized by destructive compression and non-destructive ultrasonic tests. Effect of alloying elements on the elastic modulus was determined. Microstructure and electrical conductivity properties were studied by eddy current tests. Effect of alloying elements on the conductivity was determined. Electrochemical corrosion behaviour of the superalloys was studied in NaCl solution. Effect of alloying elements on the corrosion behaviour was studied.
Title: Production and Characterization of Novel Superalloys by Powder Metallurgy Method
Description:
In this study, nickel-based superalloys (Ni-Cr-Mo-Nb-Fe-Ti) with varied Ti contents have been produced by using mechanical alloying-powder metallurgy method for turbine blade material.
Effect of Ti addition was investigated.
Superalloy powders were prepared by mechanical alloying by using 6 mm zirconia balls for 20 hours at 400 rpm.
Then, the powder mixtures were compacted at 400 MPa in a hydraulic press, and the green specimens were sintered at 1200 °C for 1 hour.
Properties of the superalloys were studied by non-destructive eddy current test and ultrasonic test.
Elastic modulus was characterized by destructive compression and non-destructive ultrasonic tests.
Effect of alloying elements on the elastic modulus was determined.
Microstructure and electrical conductivity properties were studied by eddy current tests.
Effect of alloying elements on the conductivity was determined.
Electrochemical corrosion behaviour of the superalloys was studied in NaCl solution.
Effect of alloying elements on the corrosion behaviour was studied.
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