Figure 2 EBSD results for Mo-14Re in (a) and Mo-42Re in (b).
Representative true stress-true strain curves of Mo, Mo-5Re, Mo-14Re and
Mo-42Re are shown in Figure 3. Grains with [100] and [110]
orientations are tested for each sample. In Figure 3a, Mo grains with
[100] and [110] orientations show different mechanical
responses. The yield stresses (~400MPa) are similar in
[100] Mo and [110] Mo. However, mechanical responses after yield
are different. Strong stress drops appear as strain reach to 2.5% in
[110] Mo, suggesting strong local stress release. Strain step for
the stress drop is ~ 1% within 17.5% strain, and
increases gradually as strain higher than 17.5%. Following the stress
drops to zero, stress rises immediately and reaches a new stress peak in
[110] Mo, as shown in Figure 3a. The stress in [100] Mo is much
more stable than in [110] Mo, as shown in the red curve in Figure
3a. The flow stress in [100] Mo maintains at a stable level
~ 500 MPa. The different response suggests grain with
[100] orientation possesses more stably deformation ability than
with [110] Mo.