Figure 7 Cross-sectional TEM results of compressive [100] Mo-14Re in
(a), (b), (c) and (d). The results of [110] Mo-14Re in (e), (f), (g)
and (h).
Distinguishing with un-uniform deformation in [110] Mo-14Re, the
drum type of deformed [110] Mo-42Re pillar is shown in Figure 8a and
8b. Two groups of slip bands tangle and leave steps behind, as
illustrated in the dotted rectangle in Figure 8a. Several curved slip
bands are observed in Figure 8b. Region C is magnified in Figure 8c
where one slip band divides into two slips and cross low-angle grain
boundary. The disorientation between region D and E is
~10°, as shown in Figure 8d. Slip bands are hindered
when extend to the grain boundary, which induces another slip band is
activated to release stress concentration. Thus, adding Re to Mo
strikingly enhances dislocation nucleation in grains with [110]
orientation.