A modified correlation between KJIC and Charpy V-notch impact energy of Chinese SA508-III steel at the upper shelf

作者：Li, Xiangqing; Song, Yuxuan; Ding, Zhenyu; Bao, Shiyi^*; Gao, Zengliang

来源：Journal of Nuclear Materials, 2018, 505: 22-29.

DOI：10.1016/j.jnucmat.2018.03.056

• Fracture toughness
• Charpy V-Notch impact energy
• Elevated temperature
• Reactor pressure vessel
• J(IC) test

The fracture toughness plays a significant role in the structural integrity assessment of reactor pressure vessels (RPVs) in service temperature. The Charpy V-notch (CVN) impact test is used to estimate fracture toughness (K-IC or K-JIC) indirectly since universal fracture toughness tests are costly, sophisticated and frequently invalid. In this study, a modified correlation which based on the typical model of K-JIC-CVN at the upper shelf was established for Chinese SA508-III steel. Thereinto, the effect of test temperature (T) was directly considered in the correlation. To assess the accuracy of fracture toughness when calculating from the value of Charpy-V notch impact energy by using the modified correlation, both the Charpy-V notch impact tests and fracture toughness tests for Chinese SA508-III steel were conducted at different temperatures (100 degrees C, 150 degrees C, 200 degrees C, 250 degrees C and 320 degrees C). The results showed that the modified correlation exhibited the high precision for estimating fracture toughness of Chinese SA508-III steel and the relative error for tested and estimated results is within 8%, which is lower than that of other correlations.

• 出版日期2018-7
• 单位浙江工业大学