基于PCVN小试样评估主管道的动态断裂韧性研究

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Abstract In view of the typical thermal aging phenomenon of primary coolant pipes during service in CPR1000+ unit, the influence of thermal aging time on dynamic fracture toughness of primary coolant piping materials were investigated by the 55 mm×10 mm×10 mm pre-crack impact (PCVN) sample, combined with 3D digital image correlation (DIC). The dynamic crack growth resistance curves (dynamic J-R curve) of the base metal were obtained based on the dynamic load-displacement curves by the key curve method and load separation method, and then compared with the quasi-static fracture toughness variation tendency, and it is found that, there is an obvious embrittlement in primary pipeline mate-rial after thermal aging.

Key words： primary coolant pipes thermal aging PCVN dynamic fracture toughness DIC

Published: 08 January 2021

CLC number:

TB301

About author:: Erwei Liu received her M.S. degrees in June 2011 from Chongqing University in engineering. Since July 2011, she has worked in Suzhou Nuclear Power Research Institute, focusing on the research of material used in nuclear power plant. Weiwei Yu, Ph.D., graduated from Tianjin University,the director of the Materials & Engineering Mechanics Research branch in Suzhou Nuclear Power Research Institute. He is mainly engaged in research on thermal aging and structural integrity of nuclear power materials.

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	LIU Erwei
	JIA Wenqing
	XUE Fei
	FAN Minyu
	YU Min
	YU Weiwei

Cite this article:

LIU Erwei,JIA Wenqing,XUE Fei, et al. Evaluation of Dynamic Fracture Toughness of Primary Pipeline Material Based on PCVN Small Sample[J]. Materials Reports, 2020, 34(Z2): 418-422.

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http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ2/418

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