Fracture Toughness Analysis of the China RPV Steel with Miniaturized Specimen

Abstract:

Reactor pressurized vessel (RPV), which determines the lifetime of the nuclear power plant (NPP), is mainly forged using A508-3 steel in China. In order to meet the requirement of the small specimen test technique in the nuclear application, the fracture toughness of A508-3 steel was tested under-100°C using 1/4 CT specimens, and analyzed using Master Curve according to ASTM E 1921. In this work, the relationship of the K_IC and the distance between the cleavage crack initiation site and the front of the fatigue crack is studied, and the transition temperature T₀ of A508-3 is-98.7 ^oC, which is quite close to the test temperature.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 41-46
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.41
• Online since: March 2016
• Authors: Yun Lin*, Wen Yang, Zhen Feng Tong, Guang Sheng Ning
• Keywords: A508-3 Steel, Fracture Toughness, Miniaturized Specimen

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