Table 1 Summary of all specimens tested during the synchrotron in situ fatigue testing.
From: Location, location & size: defects close to surfaces dominate fatigue crack initiation
Specimen Name | σmax (MPa) | Internal Defect | Cause of failure | Nf (cycles) |
|---|---|---|---|---|
SLS-06 | 200 | 341 (no crack) | Surface defect (154 μm) | 82,000 (broken) |
SLS-14 | 230 | 300 (crack at 40,000 cycles) | Surface defect (100 μm) | 73,000 (stopped) |
SLS-17 | 200 | 386 (nucleation overlooked) | Surface defect (not within FOV) | 190,000 (stopped) |
SLS-22 | 200 | 314 (crack at 355,000) | Surface defect (not within FOV) | 355,000 (broken) |
SLS-40 | 240 | 350 (no crack) | Surface defect (80 μm) | 82,000 (stopped) |
(μm)- The Internal Defect
(μm) value stands for the largest internal pore observed within specimens gauge. The size (
) of some nucleating defects cannot be evaluated because they are located outside the Field of View (FOV).
(μm) value stands for the largest internal pore observed within specimens gauge. The size (
) of some nucleating defects cannot be evaluated because they are located outside the Field of View (FOV).