Microstructure and Mechanical Properties of a Novel Powder Metallurgy Nickel-Base Superalloy

Microstructure, tensile property and creep performance of a novel powder metallurgy nickel-based superalloy FGH4113A were systematically studied under two different prepared conditions. The experimental results show that the yield strengths and ultimate tensile strengths of the designed superalloy of A3-HIP and A3-HEX excess 1200 and 1650 MPa at room temperature, respectively, and still reach 900 and 1050 MPa at 800 degrees C. The 0.2% creep lifetime of A3-HEX is longer than that of A3-HIP. Prior particle boundaries are responsible for inferior creep property of A3-HIP. FGH4113A shows excellent tensile property, which is better than that of Rene104 and RR1000. The strengthening mechanism shows that superior strength of FGH4113A is attributed to precipitation strengthening.