New Ni_3Al-Based Directionally-Solidified Superalloy IC10

A new alloy named as IC10 for aero-engine vane with a service temperature of 1100℃ is introduced in this paper.The(alloy′s) composition is characterized by no Ti,1.5wt% Hf and higher than 19wt% of Al+Ta+Cr.This alloy exhibits superior oxidation resistance and excellent castability.Furthermore,its stress-rupture strength is at the same level with abroad first-generation DS superalloy.The carbides of IC10 alloy is mainly composed of TaC and HfC.Moreover,the formation of M_6C is suppressed by the secondary MC_((2)).The incipient melting temperature is increased by elemination of Ni_5Hf through a pre-treatment at 1180℃ for 2h.The low cycle fatigue life of IC10 alloy at 700℃ and 980℃ was obtained respectively.The thermal-mechanical fatigue test under the condition of 600℃ 1100℃ was conducted,and the thermal-mechanical fatigue life of IC10 alloy with in-phase and out-of-phase was presented.The aero-engine high-pressure vanes that were made of IC10 alloy is being under PRFT.