Coarsening of MX Nitrides in Cr-Mo-N-X(X=V,Nb,Ti) Ferritic Steels
Ferritic steels have been candidate structural materials for first wall and blanket structures of fusion power plant since the late 1970’s, when the fast-reactor irradiation showed them to be more swelling resistant than austenitic stainless steels. In this investigation, the coarsening of MX nitrides during aging was studied for Cr-Mo-N-X(X=V, Nb, Ti) ferritic steels. During the aging, (V, Nb, Ti)nitrides were precipitated out. From TEM observation, particle size distribution was confirmed and size distribution follows a typical log-normal distribution. The coarsening rate of MX nitrides was correlated with the Oswald ripening equation.
Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park
D. S. Bae et al., "Coarsening of MX Nitrides in Cr-Mo-N-X(X=V,Nb,Ti) Ferritic Steels", Solid State Phenomena, Vols. 124-126, pp. 1661-1664, 2007