Study on Fracture Failure Characteristics of Instrument Casing in Nuclear Power Plants

被引：0

作者：

Yan L. ^{[1
]}

Li Y. ^{[2
]}

Song M. ^{[2
]}

机构：

[1] CNNC FuJian Fuqing Nuclear Power Co. Ltd., Fuzhou

[2] Nuclear Power Institute of China, Chengdu

来源：

| 1600年 / Atomic Energy Press卷 / 38期

关键词：

Casing; Fracture; Microstructure; Nuclear Power Plant;

D O I：

10.13832/j.jnpe.2017.S2.0167

中图分类号：

学科分类号：

摘要：

In this paper, the analysis on the casing and cladding metal were carried out by macro and micro methods, including the chemical composition analysis, microstructure analysis, fracture metallography and scanning electron microscopy (SEM). The results showed that the microstructure and hardness of the casing and cladding metal were not uniform. Combined with theoretical analysis, it was concluded that the fracture property of retaining tube was fatigue fracture. The cause for fracture was welding residual stress, which results in the crack initiation under the vibration of fluid. It was suggested that the welding of the retaining sleeve should be avoided. © 2017, Editorial Board of Journal of Nuclear Power Engineering. All right reserved.

引用

页码：167 / 171

页数：4