Figure 7. Microstructure of specimen FRH-24 in (a) transverse and (d) axial sections; specimen FRH-72 in (b) transverse and (e) axial sections; and specimen FRH-168 in (c) transverse and (f) axial sections.

Figure 7. Microstructure of specimen FRH-24 in (a) transverse and (d) axial sections; specimen FRH-72
in (b) transverse and (e) axial sections; and specimen FRH-168 in (c) transverse and (f) axial sections.