Damage evaluation for an aged turbine rotor material using creep crack growth tests

摘要：

This paper presents an approach for evaluation of damage of an aged material based on the ductility exhaustion theory. The damage is expressed as the life fraction that is obtained from the parameters in the relationship between creep crack growth (CCG) rate and C*. Creep crack propagation experiments are carried out on a turbine rotor steel, 30CrlMolV, using CT specimens. Those specimens are taken from three locations of an aged turbine rotor. The test results show that the CCG rates in the materials from different locations are different depending on the service temperature. The CCG rate of E samples is the slowest because of the heavy damage of the materials. Its damage degree reaches 46％. In contrast, the damage degree of G samples is 20％.

关键词： Creep crack growth Damage Fracture Ductility exhaustion

作者: Ting Ye Fu-Zhen Xuan Zhengdong Wang

作者单位: Key Laboratory of Pressure Systems and Safety, Ministry of Education, School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

会议类型: 国际会议

会议名称: 2011 International Symposium on Structural Integrity 2011国际结构完整性学术研讨会--核工程结构完整性技术 ISSI 2011

会议地点: 合肥

会议语种:英文

页码: 107-112

在线出版日期: 2011-10-27（万方平台首次上网日期，不代表论文的发表时间）