STRUCTURAL INTEGRITY ANALYSIS OF POWER PLANT WELDS SUBJECTED TO HIGH TEMPERATURE CREEP

摘要：

Welds are metallurgically complex, with heterogeneous structures within the weld metal and heat-affected zones. In order to carry out a structural integrity assessment, it is important to have knowledge of the initial metallurgical features and the associated material property variations so that it is possible to accurately model all of the possible failure modes of welds using, for example, numerical techniques. This paper describes some fundamental issues concerning a holistic process for high temperature performance and failure prediction assessment of power plant welds. This includes welding process simulation and residual stress determination, microstructural evolution and the formulation of creep damage mechanics constitutive equations including weld metal anisotropy. Typical examples, for P91 welds, are used to illustrate the application.

作者: T. H. Hyde W. Sun A. H. Yaghi

作者单位: School of Mechanical, Materials and Manufacturing Engineering, University of Nottingham, NG7 2RD, UK

会议类型: 国际会议

会议名称: 第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-10-15（万方平台首次上网日期，不代表论文的发表时间）