Creep Properties and Damage Study of Ni-based Alloy C276 at High Temperature

摘要：

One of the two challenges about Supercritical WaterCooled Reactor is material, especially for the fuel cladding. High temperature creep tests of Ni-based alloy C276, one of the candidate materials for the fuel cladding, were carried out at 650℃~750℃, with stress 130 MPa~430 MPa. The effects of temperature and stress on creep were investigated, the change laws of steady state creep rate with stress and time to rupture were analysed, and creep damage factors were separately calculated based on Kachanovs formula and Nortons formula. The results indicate that there exist two types of primary creep characteristics in C276: Type I creep characteristic at lower stress level and Type Ⅱ at higher stress level respectively. C276 shows excellent high temperature creep resistance, and Kachanovs damage factors D vs normalized time are basically coincident at 650℃, 700° C and 750℃. The damage obtained by Nortons formula starts at about 40％ of lifetime, and the damage factors calculated by Kachanovs formula are relatively conservative.

关键词： Ni-based alloy C276 Creep Damage factor

作者: Xue Ping Mao Qi Guo Sheng Yuan Zhang Su Yang Hu Dao Gang Lu Hong Xu

作者单位: key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University, Ministry of Education, Changping District, Beijing 102206, China

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)

会议地点: 广州

会议语种:英文

页码: 1143-1148

在线出版日期: 2011-11-18（万方平台首次上网日期，不代表论文的发表时间）