Analysis method of Charpy V-notch impact data before and after electron beam welding reconstitution

作者：Wan Qiang-mao; Wang Rong-shan^*; Shu Guo-gang; Ding Hui; Huang Ping; Lv Feng; Weng Li-kui

来源：Nuclear Engineering and Design, 2011, 241(2): 459-463.

DOI：10.1016/j.nucengdes.2010.11.005

• Charpy V-notch impact (CVN) specimens
• Ductile-brittle transition temperature (DBTT)
• t/t '-Test
• Specimen reconstitution technique
• Surveillance program

The specimen reconstitution technique is one of the most promising techniques to improve the surveillance program of the reactor pressure vessel (RPV). In this study, unirradiated 30Mn2V low-alloy steels were chosen as the test materials, and the broken halves of Charpy V-notch impact (CVN) specimens were reconstituted to be new CVN specimens by the electron beam welding (EBW) as a pilot study in China. Taking the 20 insert reconstituted specimens as an example, Boltzmann function was used to fit the CVN data, the ductile-brittle transition temperature (DBTT) and its uncertainty were evaluated, and the equality of DBTT between the reconstituted specimens and original specimens was checked by t/t'-test. There is a great consistency between CVN data of EBW reconstituted specimens and that of original specimens.

• 出版日期2011-2
• 单位武汉大学