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Fig.5 Morphologies and size distributions of precipitates (Stdev—standard deviation) (a-f) TEM images (a-c) and size distributions (d-f) of precipitates formed in Fe-0.03C-10Cr-0.2Zr-0.3V steel aged at 700oC for 10 h (a, c), 100 h (b, e), and 1000 h (c, f) after HR + N treatment (g-i) SEM (g, h) and TEM (i) images of Fe-0.03C-10Cr-0.2Zr-0.3V steel aged at 700oC for 1000 h after HR treatment without corrosion (g) and after corrosion (h, i) (Arrows in Fig.5h point to the spherical precipitates)