Crack Paths 2012

1

2

2

1

20μm

20μm

200μm

a)

1

2

2

1

20μm

40μm

200μm

b)

1

2

2

1

20μm

40μm

200μm

c)

1

2

2

1

20μm

40μm

200μm

d)

Figure 5. S E Mmicrographs of the fracture surfaces with highlight of the stable (right)

and unstable (left) crack growth path obtained from specimens tested at different values

of maximumdeformation: a) 0.7%, b) 1.3%, c) 1.45% and d) 1.7%.

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