Open Access
Table 3
Mechanical test results and determination of the sample fracture toughness.
| Failure | F/L | F/rod | σ max | λ: crack spacing (±1 μm) | a: crack depth (±1 μm) | K Ic | |||
|---|---|---|---|---|---|---|---|---|---|
|
|
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| Test Matrix | Sample | (y/n) | Mode | (N/mm) | (N) | (MPa) | (μm) | (μm) | (MPa√m) |
| 1 | CCT1 | y | Brittle | 15.5 | 1190 | 50 | 36 | 7.2 | |
| CCT2 | y | Brittle | 11.2 | 865 | 85 | 32 | 6.3 | ||
| CCT3 | n | 14.2 | 1090 | 50 | 36 | 6.6> | |||
| CCT4 | n | 9.9 | 765 | 185 | 40 | 7.4> | |||
| 2 | CCT5 | y | Ductile | 63.8 | 4910 | 30 | 27 | ||
| CCT6 | y | Brittle | 17.3 | 135 | 62 | 40 | 8.7 | ||
| CCT7 | y | Brittle | 17.0 | 1310 | 100 | 45 | 10.3 | ||
| CCT8 | y | Brittle | 9.8 | 755 | 80 | 48 | 5.4 | ||
| CCT9 | y | Brittle | 11.1 | 855 | 90 | 51 | 6.5 | ||
| CCT10 | y | Brittle | 9.1 | 700 | 56 | 51 | 4.2 | ||
| 3 | AT1 | y | Brittle | 4860 | 295 | >1000 | 52 | 4.2 | |
| AT2 a | y | Brittle | |||||||
| AT3 | y | Brittle | 4890 | 295 | 800 | 54 | 4.2 | ||
| AT4 | y | Ductile | 13790 | 855 | 49 | 20 | |||
| AT5 | y | Brittle | 9660 | 600 | 65 | 28 | 5.2 | ||
| AT6 | y | Brittle | 7600 | 470 | >1000 | 45 | 5.0 | ||
| AT7 b | y | Ductile | 11450 | 705 | 18 | 21 | |||
| AT8 b | y | Ductile | 11930 | 730 | 20 | 24 | |||
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