# # Fitted Curve ! # SAE8822 Simulated Carburized Core Q+T Rc=24 100%Martensite # ElecFurnace, ConCast(279x375mm), HotRolled to 66.7mm bar # Quenched +tempered to Rc=24. Inclusions: TypeD=1 # Test: UoWaterloo, M.Khalil and T.Topper July2001 # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE8822 #Name= AisiIt_59 #Stress_units= MPa #Strain_units= strain #Sy= 918.0 #Su= 1131.0 #E= 204000 #monotonic_K= 1763.0 #monotonic_n= 0.105 #FractureStrain= 0.88 #FractureStress= 1553 (1362 corrected) #%RA= 56. #MaterialForm= bar #FailureDef= 50% load drop #BHN= 252 #Hardness, Rockwell C= 24 #Basic Oxygen= False #Electric Furnace= True #Vacuum Degas= False #Ladle Refined= False #Ingot Cast= False #Continuous Cast= True #Martensite, %= 100 #Carbon, %= 0.21 #Manganese, %= 0.9 #Phosphorus, %= 0.01 #Sulfur, %= 0.013 #Silicon, %= 0.25 #Copper, %= 0.22 #Nickel, %= 0.42 #Chromium, %= 0.52 #Molybdenum, %= 0.35 #Vanadium, %= 0.01 #Tin, %= 0.010 # SAE8822 AisiIt_59 BHN= 252 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29588. KSI, 204. GPA K' = 220.4 KSI, 1519.MPA #YIELD,0.2%= 133. KSI, 918. MPA N' = 0.1077 #ULT. STRG.= 164. KSI, 1131. MPA F. STRG COEF= 258.9 KSI, 1785.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0951 #N = 0.0000 FAT DUCT COEF= 4.4640 #RED. IN AREA = 56.0 F.DUCT EXP, c=-0.8834 #T. FRAC. STG.= 225.2 KSI, 1553. MPA Exp Cyc Yld = 113. Ksi, 778.MPA #T. FRAC. STR.= 0.880 Fit Cyc Yld = 115. Ksi, 790.MPA #No. fatigue data points= 20 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Short life and fatigue limit adjusted manually FAC Aug2009 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .88 1 1553 0 .872 204000. #Fitted_point manually 0.00966 2000 819.5 0. 0.00564 204000. #Fitted_point 0.00630 5000 795.5 0. 0.00240 204000. #Fitted_point 0.00495 10000 775.3 0. 0.00115 204000. #Fitted_point 0.00412 20000 750.0 0. 0.00044 204000. #Fitted_point 0.00344 50000 692.8 0. 0.00005 204000. #Fitted_point 0.00310 100000 631.3 0. 0.00000 204000. #Fitted_point 0.00283 200000 577.8 0. 0.00000 204000. #Fitted_point 0.00255 500000 520.7 0. 0.00000 204000. #Fitted_point 0.00237 1000000 484.2 0. 0.00000 204000. #Fitted_point 0.00221 2000000 451.5 0. 0.00000 204000. #Fitted_point 0.00202 5000000 412.6 0. 0.00000 204000. #Fitted_point 0.00189 10000000 385.9 0. 0.00000 204000. #Fitted_point 0.00189 11000000 385.9 0. 0.00000 204000. #Fitted_point manually #