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.