Study On Creep Behaviors Of Candidate Material Used In Cladding Of Super Critical Water Cooled Reactor

Super Critical Water Cooled Reactor (SCWR) is one of the candidate forms in the fourth generation reactor (GIV) units.In this paper, high temperature tensile test and creep test were carried out for Ni-based alloy C276, in order to study the high-temperature mechanical properties of the material in GIV notional aggregate at the condition of SCWR. Tensile test was carried out at 500℃,550℃,575℃,600℃and 650℃. And creep test was carried out at 600℃,650℃and 700℃with different stresses. After that, the tensile and creep properties of C276 were assessed with the micrograph of material being broken both by tensile and creep tests. And the data of the creep test were analysised with Norton's creep damage formula and Kachanov's creep damage formula. All of the results prove that the Ni-based alloy C276 has the good high-temperature mechanical property.