文献类型：期刊文献

英文题名：Assessment of toughness in long term service CrMo low alloy steel by fracture toughness and small punch test

作者：Guan, Kaishu[1]; Hua, Li[1]; Wang, Qiongqi[1]; Zou, Xiaohui[1]; Song, Ming[1]

机构：[1] Key Laboratory of Safety Science of Pressurized System, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China

年份：2011

卷号：241

期号：5

起止页码：1407

外文期刊名：Nuclear Engineering and Design

收录：EI(收录号：20111713932387)

基金：The author wishes to thank the financial support provided by National Nature Science Foundation of China (Grant No. 51075148 ) and provided by the State Bureau of Quality and Technical Supervision of China - 201110029 .

语种：英文

外文关键词：Hydrogenation - Chromium alloys - Brittle fracture - Hydrogen embrittlement - Nondestructive examination - Steel metallurgy - Alloy steel - Molybdenum alloys

摘要：Small punch test (SPT) is a miniature sample test technique which can evaluate in-service material properties with an almost non-destructive method. In this paper, the 2.25Cr1Mo steel samples serviced for 10 years in hydrogenation reactor (with temper embrittlement), 1.25Cr0.5Mo supper-pressure vapor pipe serviced for 14 years at 520 °C and several other low alloy steels have been studied by JIC fracture toughness and SPT. The linear relationship between the small punch (SP) equivalent fracture strain and the fracture toughness of JIC was created. The correlations applied to the experimental data indicated advantages of using SPT for the determining fracture toughness of in-serviced low alloy steels. Additionally, size affects the fracture pattern. Small punch samples of small size show dimple fractures whereas large fracture toughness samples show quasi-cleavage fractures. ? 2011 Elsevier B.V. All rights reserved.