Figure 2
SEM and polarized-light micrographs of the hydrided Zr-4 plate observed on various sections: (a) the ND–RD section; (b) the RD–TD section and (c) the ND–TD section. (d) High-magnification image taken on the RD–TD section, demonstrating clear evidence of hydrides being restricted within individual α-Zr grains. The apparent transgranular hydride is indicated by a black arrowhead and some coarse hydrides are highlighted by black ellipses in (b). SEM images were taken in backscattered electron imaging mode. RD, TD and ND are the plate rolling, transverse and normal directions, respectively. |