Evaluation Strength and Fracture Toughness of Reduced Activation Ferritic Steel (JLF-1) for Fusion Reactor

Abstract:

Reduced activation ferritic (JLF-1) steel is one of the leading candidates for blanket/first-wall structures in D-T fusion reactors. In fusion applications, structural materials will suffer the effects of repeated temperature changes. Therefore, a database of tensile strength and fracture toughness are very important as the temperature is 400 ° C and it's TIG welded joint. In this paper, fracture toughness J_IC and KIC) and tensile tests were carried out at room temperature (RT) and at elevated temperature (400 ° C). The tensile properties of the TIG welding joint of JLF-1 steel was also investigated. It was shown that the tensile strength and fracture toughness values of the JLF-1 steel are slightly decreased with as increase in temperature. The fracture toughness values of JLF-1 steel at room temperature and at 400°C show excellent JIC values of about 530 kJ/m2 and 340 kJ/m2, respectively.

• Periodical: Key Engineering Materials (Volumes 261-263)
• Pages: 147-152
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.261-263.147
• Online since: April 2004
• Authors: Han Ki Yoon, D.H. Kim, Yi Hyun Park, Yu Sik Kong, Akira Kohyama
• Keywords: Fracture Toughness, Reduced Activation Ferritic (JLF-1)Steel, Side Grooved Effects, Temperature and Rolling Direction Effects, Tensile Strength, TIG Welding

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