Issue 49
Y. Chang et alii, Frattura ed Integrità Strutturale, 49 (2019) 1-11; DOI: 10.3221/IGF-ESIS.49.01
60
A1, d = 54 nm B1, d = 48 nm B2, d = 73 nm
50
40
30
20
Frequency, %
10
0 20 40 60 80 100 120 140 160 0
Grain Size, nm
Figure 4: Distribution of grain size underneath FGA surface for samples A1, B1 and B2.
1000
A1, t = 315 nm B1, t = 435 nm B2, t = 386 nm
800
600
400
200
Thickness of Nanograin Layer, nm
0
0
2
4
6
8
10
Distance along Crack Growth Path, μm
Figure 5: Thickness of nanograin layer along crack growth path underneath FGA surface for samples A1, B1 and B2.
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8
A1, RB, R = 1 B1, UL, R = 1 B2, UL, R = 0.5
d* , Normalized Quantity
4
6
8
10
12
14
16
Distance along Crack Growth Path, μm
Figure 6: Distribution of normalized quantity d * versus crack growth path for samples A1, B1 and B2.
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