Fujio Abe

TL;DR: In this article, the authors investigated the creep fracture mode and long-term creep rupture strength for SUS321H and SUS347H austenitic stainless steels and found that fine TiC and NbC precipitated in the matrix of the steels, respectively, accompanying the re-dissolution of previously precipitated M23C 6 along grain boundaries.

TL;DR: In this paper, the effects of titanium concentration and tungsten addition on the nano-mesoscopic structure of high-Cr oxide dispersion strengthened (ODS) ferritic steels were studied by diffraction contrast techniques, including weak beam electron microscopy.

TL;DR: In this article, the microstructural evolution during thermal aging at 823-973 K and its effect on the toughness were investigated for simple Cr-W and Cr-V steels by means of transmission electron microscopy and Charpy impact testing.

TL;DR: In this article, the authors analyzed the microstructure evolution of 9Cr-3W-3Co-V, Nb steel with boron addition (B steel) during HAZ thermal cycle at the peak temperature of around Ac3 (Ac3 HAZ) and post-weld heat treatment (PWHT) to elucidate the prevention mechanism of type IV failure by Boron addition.

TL;DR: In this article, the effect of W and Co on the creep deformation and microstructure of fully annealed and precipitation strengthened 15Cr-3W ferritic steels at 923 and 973 K were investigated.