Crack Paths 2012

Fig. 4 illustrates the percentage of cavitation (Cs%) as a function of distance from

fracture surface ( Fig. 4a, 4b, 4c) and from longitudinal axis ( Fig.4d, 4e, 4f) at each test

temperature. In general, the maximumpercentage of cavitation is localized close to

fracture surface (Fig. 4a, 4b, 4c) but not always on the longitudinal axis of samples

(Fig. 4d, 4e, 4f). Moreover, it’s evident that cavitation increases with T and with

ductility (above all at highest T).

250°C

0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 10246802468 2 d0i°stCance from fracture [mm] C

10-3s -1 04 - s

a

d

-3,00-2,25-1,50-0,75 0,00 0,75 1,50 2,25 3,00

10-3s-1

10-4s-1

10-5s-1

6

4 1802 C s %

s %

2

0

distance from longitudinal axis [mm]

300°C

10-3s

10-3s

300°C

18 1246

12 180

-1

-1

10-45s-1

b

e

10 -4s-1

10-5s-1

0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 1024680

6

4 C s %

C s %

distance from fracture [mm]

02

-3,00-2,25-1,50-0,75 0,00 0,751,502,25 3,00

distance from longitudinal axis [mm]

10246802

c

f

400°C

0,0 0,5 1,0 1,5 2,0 2,5 3,0 3,5 4,0 4,5 5,0 10246802468 4 0°diCstance from fracture [mm] C

10-04s-1 -3 s -1

10-3s-1

-3,00-2,25-1,50-0,75 0,00 0,75 1,50 2,25 3,00

-1

10 -4 s

C s %

s %

distance from longitudinal axis [mm]

Figure 4. distribution of cavites ( Cs%)as function of distance from fracture surface at

250 (a), 300(b), and 400°C(c) and as function if distance from longitudinal axis of the

samples at 250 (d), 300(e), and 400°C(f)

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