Residual stress assessment of nickel-based alloy 690 welding parts

被引：11
|
作者：
Lee, Sang-Hwan [1 ]
Chang, Yoon-Suk [1 ]
Kim, Sung-Woo [2 ]
机构：
[1] Kyung Hee Univ, Dept Nucl Engn, Yongin 446701, Kyounggi, South Korea
[2] Korea Atom Energy Res Inst, Nucl Mat Safety Res Div, Taejon 305353, South Korea
来源：
ENGINEERING FAILURE ANALYSIS | 2015年 / 54卷
关键词：
Finite element analysis; Nickel-based alloy; PWSCC; Welding residual stress; PRESSURE-VESSEL; PIPE; SIMULATION; CRACKING; FATIGUE;
D O I：
10.1016/j.engfailanal.2015.03.022
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
Failures of welding parts in nuclear power plants have increased significantly. One of main degradation mechanisms was initiation and growth of primary water stress corrosion cracking accelerated by residual stress at dissimilar metal welds of piping, reactor head penetrations and nozzles connecting major components. Therefore, estimation of the welding residual stress became an important issue for ensuring reliability of them. The present study deals with verification of welding simulation techniques through sensitivity analyses of bottom-mounted instrumentation nozzle mock-up and control rod drive mechanism (CRDM) nozzle mock-up, examination of residual stress effects for a welded cylindrical block and application of the residual stress evaluation method to real penetration nozzles of CRDM made of nickel-based alloy 690. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：57 / 73
页数：17
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