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.

Automated summary

In this study, the microstructure, tensile property, and creep performance of a novel powder metallurgy nickel-based superalloy FGH4113A were systematically investigated. The experimental results demonstrated that this alloy exhibited high yield strength and ultimate tensile strength, and maintained good performance at high temperatures. The excellent tensile property was attributed to the precipitation strengthening mechanism.