# # Fitted Curve ! # SAE4320 Rc=60 Thru Carburized # ElecFurnace, ConCast(279x375) HotRolled to 63.5mmbar # Carburized, 100%Martensite, No TypeABC Inclusions, TypeD =1 # Test: UoWaterloo M.Khalil T.Topper July 2002 # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE4320 #Name= AisiIt_50 #Stress_units= MPa #Strain_units= strain #Sy= 1250.0 #Su= 2060 #E= 201000 #monotonic_K= 6856.0 #monotonic_n= 0.273 #FractureStrain= 0.022 #FractureStress= 2060 #%RA= 2.2 #MaterialForm= bar #FailureDef= 50% load drop #BHN= 600 #Hardness, Rockwell C= 60 #Basic Oxygen= False #Electric Furnace= True #Vacuum Degas= False #Ladle Refined= False #Ingot Cast= False #Continuous Cast= True #Martensite, %= 100 #Carbon, %= 0.18 #Manganese, %= 0.48 #Phosphorus, %= 0.006 #Sulfur, %= 0.02 #Silicon, %= 0.26 #Copper, %= 0.17 #Nickel, %= 1.74 #Chromium, %= 0.58 #Molybdenum, %= 0.17 #Vanadium, %= 0.00 # SAE4320 AisiIt_50 BHN= 600 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29153. KSI, 201. GPA K' =4847.0 KSI, 33419.MPA #YIELD,0.2%= 181. KSI, 1250. MPA N' = 0.3826 #ULT. STRG.= 0. KSI, 0. MPA F. STRG COEF= 592.1 KSI, 4082.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.1138 #N = 0.0000 FAT DUCT COEF= 0.0041 #RED. IN AREA = 2.2 F.DUCT EXP, c=-0.2974 #T. FRAC. STG.= 298.8 KSI, 2060. MPA Exp Cyc Yld = 450. Ksi,3100.MPA #T. FRAC. STR.= 0.022 Fit Cyc Yld = 403. Ksi,2776.MPA #No. fatigue data points= 18 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Fitted short life and fatigue limit manually. FAC July2009 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .022 1 2060 0. .0117 201000. #Fitted_point manually 0.01066 500 2002.4 0. 0.00070 201000. #Fitted_point 0.00978 1000 1856.0 0. 0.00055 201000. #Fitted_point 0.00898 2000 1719.2 0. 0.00043 201000. #Fitted_point 0.00803 5000 1552.6 0. 0.00031 201000. #Fitted_point 0.00739 10000 1436.6 0. 0.00024 201000. #Fitted_point 0.00680 20000 1328.8 0. 0.00019 201000. #Fitted_point 0.00609 50000 1198.1 0. 0.00013 201000. #Fitted_point 0.00561 100000 1107.6 0. 0.00010 201000. #Fitted_point 0.00517 200000 1023.7 0. 0.00008 201000. #Fitted_point 0.00465 500000 922.3 0. 0.00006 201000. #Fitted_point 0.00429 1000000 852.3 0. 0.00004 201000. #Fitted_point 0.00395 2000000 787.5 0. 0.00003 201000. #Fitted_point 0.00355 5000000 709.3 0. 0.00002 201000. #Fitted_point 0.00328 10000000 655.3 0. 0.00002 201000. #Fitted_point 0.00328 20000000 655.3 0. 0.00002 201000. #Fitted_point manually #