# # Fitted Curve ! # SAE1038 Q+T Rb=100, Bhn=245, AISI_iter20 Stelco # BasicOxygen, LadleRefined, ConCast(300x600mm), HotRolled to 18mmBar # Quenched from 1650F in water, Temp. 930F, 20%Bainite, # 50%Martensite, 30%Ferrite, Inclus.:TypeA=2-2.5Thin, TypeB,C,D=0 # Test: UoToledo, B.Li, M.Roessle and A.Fatemi Sept.1998 # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE1038 #Name= AisiIt_20 #Name= Quench+Temp #Stress_units= MPa #Strain_units= strain #Sy= 559.8 #Su= 743.0 #E= 212699 (avg. of 20) reported=218000 #monotonic_K= 1230.6 #monotonic_n= 0.169 #LowerYield= 555.6 #UpperYield= 610.3 #FractureStrain= 1.16 #FractureStress= 1292. #%RA= 69. #MaterialForm= bar #FailureDef= 50% load drop #BHN= 245 #HRb= 100. #Basic Oxygen= True #Electric Furnace= False #Vacuum Degas= False #Ladle Refined= True #Ingot Cast= False #Continuous Cast= True #Bainite, %= 20 #Martensite, %= 50 #Ferrite, %= 30 #Carbon, %= 0.4 #Manganese, %= 0.8 #Phosphorus, %= 0.013 #Sulfur, %= 0.024 #Silicon, %= 0.28 #Copper, %= 0.03 #Nickel, %= 0.01 #Chromium, %= 0.04 #Molybdenum, %= 0.01 #Vanadium, %= 0.00 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.030 # SAE1038 AisiIt_20 BHN= 245 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 30849. KSI, 213. GPA K' = 176.2 KSI, 1215.MPA #YIELD,0.2%= 81. KSI, 560. MPA N' = 0.1634 #ULT. STRG.= 108. KSI, 743. MPA F. STRG COEF= 162.0 KSI, 1117.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0872 #N = 0.0000 FAT DUCT COEF= 0.5980 #RED. IN AREA = 69.0 F.DUCT EXP, c=-0.5335 #T. FRAC. STG.= 187.4 KSI, 1292. MPA Exp Cyc Yld = 64. Ksi, 440.MPA #T. FRAC. STR.= 1.160 Fit Cyc Yld = 66. Ksi, 452.MPA #No. fatigue data points= 19 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Short life and long life points fitted manually. FAC Sept.2009 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 1.16 1 1292 0. 1.154 216999. #Fitted_point manually 0.02477 500 660.6 0. 0.02167 212699. #Fitted_point 0.01788 1000 622.8 0. 0.01495 212699. #Fitted_point 0.01307 2000 587.1 0. 0.01031 212699. #Fitted_point 0.00886 5000 543.0 0. 0.00631 212699. #Fitted_point 0.00675 10000 511.7 0. 0.00434 212699. #Fitted_point 0.00525 20000 482.1 0. 0.00298 212699. #Fitted_point 0.00391 50000 445.5 0. 0.00181 212699. #Fitted_point 0.00321 100000 419.4 0. 0.00124 212699. #Fitted_point 0.00270 200000 394.7 0. 0.00085 212699. #Fitted_point .00226 700000 376. 0. .00054 212699. #Fitted_point manually .00200 3000000 354. 0. .00040 212699. #Fitted_point manually .00200 10000000 354. 0. .00040 212699. #Fitted_point manually #