A low-activation vanadium alloy with the composition of V-4 mass% Cr-4 mass% Ti is an alternative to reduced-activation ferritic/martensitic (RAFM) steels for blanket structural material in fusion reactors. The NIFS-HEAT-2 (NH2) is the world’s highest-purity V-4Cr-4Ti alloy among over-30 kg-scale heats. The processes to purify this heat have successfully enhanced workability, weldability and low-activation characteristics, however degradation of high-temperature strength was a concern. The present study evaluated high-temperature creep properties of NH2, and confirmed no degradation under projected blanket service stresses.
Revised: October 23, 2019 |
Published: September 2, 2019
Citation
Nagasaka T., T. Muroga, T. Tanaka, A. Sagara, A. Sagara, K. Fukumoto, and P.F. Zheng, et al. 2019.High-Temperature Creep Properties of NIFS-Heat-2 High-Purity Low-Activation Vanadium Alloy.Nuclear Fusion 59, no. 9:Article Number 096046.PNNL-SA-138898.doi:10.1088/1741-4326/ab1c8f