Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Xi'an Technological University》 2009-04
Add to Favorite Get Latest Update

Investigation of the Thermal Aging Effect on the Tensile Property of Primary Pipe Material in Nuclear Power Plant

MENG Xin-ming1,GENG Bo1,YU Wei-wei1,XUE Fei1,WANG Zhao-xi1,TI Wen-xin1,SHI Chong-zhe2(1.Suzhou Nuclear Power Research Institute,Suzhou 215004,China;2.School of Meterials and Chemical Engineering,Xi'an Technological University,Xi'an 710032,China)  
This experiment was conducted to study the effect of thermal aging on tensile properties of casting austenitic stainless steel(Z3CN20.09M) used in primary pipe of nuclear power plant.Tensile tests were performed on both thermal aged and unaged samples,then microstructures of the material at different thermal ageing times were observed by SEM and TEM.Finally,a model of R-O was used to analyze the tensile property.It is shown that the tensile property at 350 ℃ is inferior to that at ambient temperature.With the thermal aging time increasing,the tensile strength of the material gradually increases,but the elongation percentage changes reversely.A micropore aggregation fracture type of tensile samples was discovered by SEM,and the fibrous area of the fracture became smaller and flatter,the number of the second-phase particles gradually increasesd,meanwhile,the dimples became smaller and shallower with the thermal aging time.The TEM image shows that the perfect dislocation in austenite reduces,besides carbides precipitate on phase boundary of austenite-ferrite with the thermal aging time.The curve with R-O model fits well with test data when the strain is limited in 3%.Therefore,Z3CN20.09M steel becomes brittle result from the thermal aging,and Ramberg-Osgood model can predict the thermal aging effect on the tensile property for the small strain range.
【Fund】: 973资助项目(2007BC209802);; 江苏省自然科学基金资助项目(BK2008177)
【CateGory Index】: TG113.25
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved