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MMPDS-01 31 January 2003 Figure 2.3.1.3.8(l). Best-fit S/N curves for notched, K t = 3.3, AISI 4340 alloy <strong>steel</strong> bar, F tu = 200 ksi, longitudinal direction. Correlative Information for Figure 2.3.1.3.8(l) Product Form: Rolled bar, 1.125 inch diameter, air melted Properties: TUS, ksi TYS, ksi Temp., EF 208 — RT (unnotched) 251 — RT (notched) Specimen Details: Notched, V-Groove, K t = 3.3 0.450 inch gross diameter 0.400 inch net diameter 0.010 inch root radius, r 60E flank angle, ω Surface Condition: Lathe turned to RMS 10 Test Parameters: Loading - Axial Frequency - 2000 to 2500 cpm Temperature - RT Atmosphere - Air No. of Heat/Lots: 1 Equivalent Stress Equation: Log N f = 7.52-1.96 log (S eq -31.2) S eq = S max (1-R) 0.65 Std. Error of Estimate, Log (Life) = 0.16 Standard Deviation, Log (Life) = 0.62 R 2 = 93% Sample Size = 26 Reference: 2.3.1.3.8(a) [Caution: The equivalent stress model may provide unrealistic life predictions for stress ratios beyond those represented above.] 2-56
MMPDS-01 31 January 2003 Figure 2.3.1.3.8(m). Best-fit S/N curves for unnotched AISI 4340 alloy <strong>steel</strong> bar and billet, F tu = 260 ksi, longitudinal direction. Correlative Information for Figure 2.3.1.3.8(m) Product Form: Rolled bar, 1.125 inch diameter, air melted Billet, 6 inches RCS air melted Properties: TUS, ksi TYS, ksi Temp., EF 266, 291 232 RT (unnotched) 352 — RT (notched) Specimen Details: Unnotched 0.200 and 0.400 inch diameter Surface Condition: Hand polished to RMS 10 Test Parameters: Loading - Axial Frequency - 1800 to 2500 cpm Temperature - RT Atmosphere - Air No. of Heat/Lots: 2 Equivalent Stress Equation: Log N f = 11.62-3.75 log (S eq -80.0) S eq = S max (1-R) 0.44 Std. Error of Estimate, Log (Life) = 0.64 Standard Deviation, Log (Life) = 0.86 R 2 = 45% References: 2.3.1.3.8(a) and (b) Sample Size = 41 [Caution: The equivalent stress model may provide unrealistic life predictions for stress ratios beyond those represented above.] 2-57
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MMPDS-01 31 January 2003 CHAPTER 2
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MMPDS-01 31 January 2003 and above
Page 5 and 6: MMPDS-01 31 January 2003 2.1.2.1.4
Page 7 and 8: MMPDS-01 31 January 2003 2.2.0.3 En
Page 9 and 10: MMPDS-01 31 January 2003 9 α, - Be
Page 11 and 12: MMPDS-01 31 January 2003 Heat Treat
Page 13 and 14: MMPDS-01 31 January 2003 Figure 2.3
Page 15 and 16: MMPDS-01 31 January 2003 2.3.1 SPEC
Page 17 and 18: MMPDS-01 31 January 2003 Table 2.3.
Page 27 and 28: MMPDS-01 31 January 2003 200 180 St
Page 29 and 30: MMPDS-01 31 January 2003 120 110 E
Page 37 and 38: . . MMPDS-01 31 January 2003 140 12
Page 39 and 40: MMPDS-01 31 January 2003 200 200-ks
Page 43 and 44: MMPDS-01 31 January 2003 300 B = 2
Page 55: MMPDS-01 31 January 2003 Figure 2.3
Page 59 and 60: . . MMPDS-01 31 January 2003 Maximu
Page 71 and 72: MMPDS-01 31 January 2003 100 Streng
Page 73 and 74: . MMPDS-01 31 January 2003 100 80 P
Page 77 and 78: MMPDS-01 31 January 2003 100 80 F s
Page 79 and 80: MMPDS-01 31 January 2003 2.4.3 9Ni-
Page 81 and 82: MMPDS-01 31 January 2003 9 8 α - B
Page 83 and 84: MMPDS-01 31 January 2003 6WUHQJWK
Page 85 and 86: MMPDS-01 31 January 2003 200 180 Mo
Page 87 and 88: MMPDS-01 31 January 2003 /RQJLWXGL
Page 89 and 90: MMPDS-01 31 January 2003 6KRUW WUD
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