Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7168434 | Engineering Failure Analysis | 2014 | 15 Pages |
Abstract
In this paper a failure of steam pipe weld after 140,000Â h of service in power generation plant has been analyzed. Efforts were made to analyze the cause of failure in both experiment and finite element analysis (FEA) methods. Intergranular cavities and cracks were detected around the primary cracks. Study shows that the main failure mechanism is creep cracking. Cracks developed in this failed pipe as a result of cavity nucleation on grain boundaries, followed by cavity growth and linkage to form micro- and eventually macro-intergranular cracks. This paper brings out the details of investigation and suggests remedial measures to improve performance of this welded pipe under high temperature and pressure condition.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Qiaoling Chu, Min Zhang, Jihong Li, Yinni Chen, Hailong Luo, Qiang Wang,