PSI - Issue 2_A

Author name / Structural Integrity Procedia 00 (2016) 000 – 000

5

André L. M. Carvalho et al. / Procedia Structural Integrity 2 (2016) 3697–3704

3701

a)

b)

I region

II region

2

1

Crack propagation direction

c)

d)

100μm

100μm

Grain boundary

TD

RD

f)

e)

Fig. 2. (a) and (b) SEM micrographs show the plane which the fatigue crack propagated (RD) obtained from the T6I4-65 and RRA conditions, respectively. Encircled regions (1 and 2) in the SEM images illustrate the regions which overload occurred, notice also crack deflection for both conditions. (c) and (d) orientation distribution maps from the I and II regions, respectively. (e) and (f) EBSD inverse pole-figures (IPF X) of both I and II regions, respectively.