Bae, D.S. Jung, W.S. Hong, K.T. Lee, K.S. 2024-01-12T07:53:48Z 2024-01-12T07:53:48Z 2022-03-07 2007-05 1013-9826 https://pubs.kist.re.kr/handle/201004/81473 The precipitation behavior of MX nitrides during aging was investigated for Cr-Mo-N-X (X=V,Nb,Ti) ferritic steels. MX nitrides, which are finely dispersed in the matrix of Cr-Mo ferritic heat resistance steel, increase the creep strength of the steels by the precipitation strengthening mechanism. However, MX particles usually coarsen during aging, and this results in a decrease of creep strength. In order to clarify the coarsening process of MX particles, TEM samples were prepared from the aged for up to 3000hours specimens. During the aging, V, Nb and Ti containing nitrides (called MX nitrides) were precipitated out. From TEM observation, particle size distribution was confirmed and size distribution follows a typical log-normal distribution. The observed coarsening behavior well agreed with the calculated coarsening behavior of precipitates by Oswald ripening equation. English Trans Tech Publications Ltd Precipitation behavior of MX phase in Cr-Mo-N-X(X=V,Nb,Ti) ferritic steels Conference 10.4028/0-87849-440-5.1553 1 10th International Conference on the Mechanical Behavior of Materials , pp.1553 - 1556 10th International Conference on the Mechanical Behavior of Materials 1553 1556 SZ Busan 2007-05-27 Key Engineering Materials 2-s2.0-34248508674