Fatigue Crack Growth in 7050T7451 Aluminium Alloy Thick Section ...

DSTO-TR-1477Table A-16. Results of the quantitative fractography on KSIF 183, peak stress 450MPaNo. of spectraIARPO3a + 5 markerloadsSimulated FlightHoursMeasurement fromflaw edge to crackpositionmm.Addition of Type IEPS (measured flawdepth)mmAddition of Type IIEPSmm0 0 0.028 0.030.5 162.46 0.006 0.034 0.0362.5 812.3 0.016 0.044 0.0463.5 1137.2 0.0244 0.0524 0.05444.5 1462.1 0.0348 0.0628 0.06485.5 1787.1 0.0433 0.0713 0.07336.5 2112 0.0561 0.0841 0.08617.5 2436.9 0.0684 0.0964 0.09848.5 2761.8 0.0839 0.1119 0.11399.5 3086.7 0.1003 0.1283 0.130310.5 3411.7 0.1222 0.1502 0.152211.5 3736.6 0.1562 0.1842 0.186212.5 4061.5 0.2014 0.2294 0.231413.5 4386.4 0.2462 0.2742 0.276214.5 4711.3 0.2933 0.3213 0.323315.5 5036.3 0.3973 0.4253 0.427316.5 5361.2 0.58 0.608 0.6118.5 6011 1.272 1.3 1.30219.4 6303.4 1.948 1.976 1.978Table A-17. Results of the quantitative fractography on KSIF 178, peak stress 450MPaNo. of spectraIARPO3a + 5 markerloadsSimulated FlightHoursMeasurement fromflaw edge to crackpositionmm.Addition of Type IEPS (measured flawdepth)mmAddition of Type IIEPSmm0 0 0.013 0.011.5 487.38 0.0116 0.0246 0.02162.5 812.3 0.0204 0.0334 0.03043.5 1137.2 0.0348 0.0478 0.04484.5 1462.1 0.0597 0.0727 0.06975.5 1787.1 0.0963 0.1093 0.10636.5 2112 0.1433 0.1563 0.15337.5 2436.9 0.1997 0.2127 0.20978.5 2761.8 0.2565 0.2695 0.26659.5 3086.7 0.3583 0.3713 0.368310.5 3411.7 0.5123 0.5253 0.522311.5 3736.6 0.6954 0.7084 0.705412.5 4061.5 0.8753 0.8883 0.885313.5 4386.4 1.3675 1.3805 1.377514.73 4786.1 1.8905 1.9035 1.9005Table A-18. Results of the quantitative fractography on KSIF 186, peak stress 450MPaNo. of spectraIARPO3a + 5 markerloadsSimulated FlightHoursMeasurement fromflaw edge to crackpositionmm.Addition of Type IEPS (measured flawdepth)mmAddition of Type IIEPSmm0 0 0.0392 0.030.5 162.46 0.004 0.0432 0.0341.5 487.38 0.008 0.0472 0.0382.5 812.3 0.0132 0.0524 0.04323.5 1137.2 0.0192 0.0584 0.04924.5 1462.1 0.0252 0.0644 0.05525.5 1787.1 0.034 0.0732 0.0646.5 2112 0.0464 0.0856 0.07647.5 2436.9 0.0608 0.1 0.09088.5 2761.8 0.0836 0.1228 0.113655