Life prediction for high temperature bolting of ultra-supercritical units

摘要：

The paper analyzes the damage mechanisms during stress relaxation of high temperature (HT) bolts of ul-tra-supercritical steam turbine units. Based on creep damage mechanisms and relaxation characteristics,the paper proposes a life prediction model to predict relaxation behavior and the life of HT bolting material ICrlONiMoW2VNbN.Validation results indicate that the developed model has led to better consistent results with experimental data and thus can be recommended in relaxation life evaluation of HT materials.

关键词： Life assessment model Bolt Stress relaxation Creep damage Average creep rate

作者: Jinquan Guo Fu-Zhen Xuan Zhengdong Wang Shan-Tung Tu

作者单位: MOE Key Lab of Safety Science of Pressurized System,East China University of Science and Technology,Shanghai 200237,China

会议类型: 国际会议

会议名称: Fracture Mechanics and Applications 2008(国际断裂力学2008年年会)(FM2008)

会议地点: 杭州

会议语种:英文

页码: 275-279

在线出版日期: 2008-10-31（万方平台首次上网日期，不代表论文的发表时间）