EXPERIMENTAL STUDY ON FATIGUE GROWTH OF SURFACE CRACKS ON WELD OVERLAY IN COMPOSITE STRUCTURE
The vessels with composite structure were widely used to refining oil and petrochemical devices such as hydrogenation reactor with a hot wall, which is made from 2.25Cr1Mo as a base material and austenitic stainless steel 309L+347L as overlay. The hydrogenation reactor services at severe conditions of high temperature, high pressure, hydrogen environment. A stripping and surface crack on overlay induced hydrogen is usually created on overlay, which damages to the structure integrity of hydrogenation reactor. The fatigue growth of surface cracks on overlay of hydrogenation reactor was attracted attention of engineering fields. In this paper, the experimental study on fatigue growth of surface crack on overlay was carried out. The patterns of surface crack growth showed that surface crack on overlay could penetrate through the interface of overlay and base material under the fatigue load, when overlay and base material were combined better each other. The fatigue propagation rate of surface crack on overlay was obtained from the experimental results.
SHEN Shiming DING Guoquan
College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing, 210009, P.R.China
国际会议
第九届工程结构完整性国际会议(The Ninth International Conference on Engineering Structural Integrity Assessment)
北京
英文
2007-10-15（万方平台首次上网日期，不代表论文的发表时间）