Influence of element Re on creep behavior of single crystal nickel-base superalloys at intermediate temperature

摘要

By means of creep curves measurement and microstructure observation,an investigation hasbeen made into the influence of element Re on creep behaviors of single crystal nickel-base superalloyat intermediate temperature.Results show that,compared to free-Re alloy,4.5% Re alloydisplays a better creep resistance.During creep,the cubical gamma prime phase in free-Re alloy istransformed into the bunch-like structure,and thegamma prime phase in 4.5% Re alloy keeps stillthe cubical configuration.