# # Fitted Curve ! # SAE1070 Rc=60 (Range=57-62) Induction Hardened to simulate Case properties. # BasicOxygen, LadleRefined, ConCast(313x372mm) HotRolled to 50mm Bar # Typical Appl.: Bearings and Forgings # Specimens machined then Induction hardened, 100%Martensite # Inclusions: TypeA,B,C=none, TypeD=1.5Heavy # Material cyclically hardens: Monotonic is below cyclic # Test: UoWaterloo, M.Kalil, T.Topper # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE1070 #Name= AisiIt_37 #Name= InducHard #Stress_units= MPa #Strain_units= strain #Sy= 1950.0 #Su= 2069.0 #E= 212000 #monotonic_K= 10875.0 #monotonic_n= 0.282 #FractureStrain= 0.013 (avg. of 2) #FractureStress= 1744 #%RA= 0 (not measurable) #MaterialForm= bar #FailureDef= 50% load drop #BHN= 613 #Hardness, Rockwell C= 60 #StrAmp 2Nf StsAmp So CalcPlasStr InitialModulus #Basic Oxygen= True #Electric Furnace= False #Vacuum Degas= False #Ladle Refined= True #Ingot Cast= False #Continuous Cast= True #Martensite, %= 100 #Carbon, %= 0.7 #Manganese, %= 0.98 #Phosphorus, %= 0.014 #Sulfur, %= 0.024 #Silicon, %= 0.28 #Copper, %= 0.02 #Nickel, %= 0.01 #Chromium, %= 0.11 #Molybdenum, %= 0.05 #Aluminum, %= 0.031 #Nitrogen, ppm= 33 # SAE1070 AisiIt_37 BHN= 613 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 30748. KSI, 212. GPA K' =****** KSI,665517.MPA #YIELD,0.2%= 283. KSI, 1950. MPA N' = 0.8122 #ULT. STRG.= 300. KSI, 2069. MPA F. STRG COEF= 454.0 KSI, 3130.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.1146 #N = 0.0000 FAT DUCT COEF= 0.0014 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.1411 #T. FRAC. STG.= 252.9 KSI, 1744. MPA Exp Cyc Yld = 620. Ksi,4276.MPA #T. FRAC. STR.= 0.013 Fit Cyc Yld = 323. Ksi,2229.MPA #No. fatigue data points= 23 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Due to cyclic hardening, monotonic not used for short life. # NOTE!! Fatigue limit fitted manually. #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .013 1 2000. 0. .0036 212000. #Fitted_point manually 0.01022 50 1958.7 0. 0.00098 212000. #Fitted_point 0.00942 100 1847.8 0. 0.00071 212000. #Fitted_point 0.00869 200 1736.4 0. 0.00050 212000. #Fitted_point 0.00781 500 1590.7 0. 0.00031 212000. #Fitted_point 0.00721 1000 1483.2 0. 0.00021 212000. #Fitted_point 0.00665 2000 1379.5 0. 0.00014 212000. #Fitted_point 0.00597 5000 1249.4 0. 0.00008 212000. #Fitted_point 0.00551 10000 1157.2 0. 0.00005 212000. #Fitted_point 0.00508 20000 1070.6 0. 0.00003 212000. #Fitted_point 0.00457 50000 964.8 0. 0.00002 212000. #Fitted_point 0.00422 100000 891.3 0. 0.00001 212000. #Fitted_point .00300 500000 670 0. .0 212000. #Fitted_point manually .00200 2000000 424. 0. .0 212000. #Fitted_point manually .00200 10000000 424. 0. .0 212000. #Fitted_point manually #