ժҪ The need for nickel-base powder metallurgy (PM) superalloy turbine discs is becoming increasingly evident. With the eventual aim of improving thrust-to-weight ratio of aeroengines for power generation, well integration of significantly high strength, high damage tolerance and high-temperature capability would be reasonably required. An advanced PM superalloy, which was designed for applications up to 815-850 ��, was experimentally investigated. Emphasis was primarily put on microstructure and mechanical properties. The results indicated the measured phases in the sample were composed of ��, �á�, MC, and M3B2. With uniform coarse grain microstructure (ASTM 5-6), the sample appeared to exhibit overwhelming superiority over the prior art materials FGH95, FGH96, FGH97 and FGH98. The dominant embodiments consisted of high tensile strength (Rm=1000 MPa and Rp0. 2=800 MPa at 850 ��), strong creep resistance (��p=0. 12% at 815 ��/400 MPa/50 h), and considerable stress-rupture life (��=457. 4 h at 815 ��/450 MPa). The technical practicability of applications up to 815-850 �� of this alloy was conclusively proved.
Abstract��The need for nickel-base powder metallurgy (PM) superalloy turbine discs is becoming increasingly evident. With the eventual aim of improving thrust-to-weight ratio of aeroengines for power generation, well integration of significantly high strength, high damage tolerance and high-temperature capability would be reasonably required. An advanced PM superalloy, which was designed for applications up to 815-850 ��, was experimentally investigated. Emphasis was primarily put on microstructure and mechanical properties. The results indicated the measured phases in the sample were composed of ��, �á�, MC, and M3B2. With uniform coarse grain microstructure (ASTM 5-6), the sample appeared to exhibit overwhelming superiority over the prior art materials FGH95, FGH96, FGH97 and FGH98. The dominant embodiments consisted of high tensile strength (Rm=1000 MPa and Rp0. 2=800 MPa at 850 ��), strong creep resistance (��p=0. 12% at 815 ��/400 MPa/50 h), and considerable stress-rupture life (��=457. 4 h at 815 ��/450 MPa). The technical practicability of applications up to 815-850 �� of this alloy was conclusively proved.
Chao-jie WU,Yu TAO,Jian JIA. Microstructure and Properties of an Advanced Nickel-base PM Superalloy[J]. �й������ڿ���, 2014, 21(12): 1152-1157.
Chao-jie WU,Yu TAO,Jian JIA. Microstructure and Properties of an Advanced Nickel-base PM Superalloy. Chinese Journal of Iron and Steel, 2014, 21(12): 1152-1157.