Characterization of Microstructure,Micro-chemistry and Properties of Advanced Dissimilar Metal Weld for Nuclear Power Plants
The microstructure,micro-chemistry and properties of dissimilar metal weld A508/52M/316L made in Shanghai for new pressurized water reactor (PWR) nuclear power plants have been characterized.Results showed that the weld exhibits complicated microstructures,with significant change around the interfaces A508/52M and 52M/316L.The variations of main elements in 52M weld metal are greater than those in the A508 and 316L,with significant changes in the zones closed to the interfaces.The bulk 52M weld metal and the interface areas have higher and more uneven hardness than both of the base metals A508 and 316L.The hot-affected zone (HAZ) of A508 exhibits the highest hardness value in the weld.Slow strain rate tests in simulated PWR primary water at 290°C showed that the area around the A508/52M interface is the most weak part for stress corrosion cracking (SCC) resistance of the weld in the service-related environment.The SCC susceptibility is significantly affected by electrode potential which is related to water chemistry especially dissolved oxygen content in water.
dissimilar metal weld analysis and test nuclear power plant
LI Guangfu FANG Kewei LI Guanjun PENG Jun Guanghui WANG YANG Wu
Shanghai Research Institute of Materials,Shanghai Key Lab for Engineering Materials Evaluation,Shanghai,China
国际会议
Asia Steel International conference 2012(第五届亚洲钢铁大会)
北京
英文
1-7
2012-09-23（万方平台首次上网日期，不代表论文的发表时间）