# # Fitted Curve ! # SAE1038 Cold Sized, Bhn= 185, HRb=90, Stelco # Cold Sized 19mm bar. Typical Shaft material. 50%Pearlite 50%Ferrite # ASTM GrainSize: longit. 8 to 10 # Inclusions: TypeA=1.5Thin, TypeB=0.5Thin, TypeC=none TypeD=0.5Thin # Test: UoToledo, Apr1998, M.Roessle and A.Fatemi # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE1038 #Name= AisiIt_19 #Name= ColdSized #Stress_units= MPa #Strain_units= strain #Sy= 359.4 #Su= 651.6 #E= 213750 avg. of 20, initially reported=219000 #monotonic_K= 1186.4 #monotonic_n= 0.219 #LowerYield= 381.6 #UpperYield= 388.9 #FractureStrain= 0.76 #FractureStress= 1051. #%RA= 53 #MaterialForm= bar #FailureDef= 50% load drop #BHN= 185 #Hardness, Rockwell B= 90 #Basic Oxygen= False #Electric Furnace= False #Vacuum Degas= False #Ladle Refined= False #Ingot Cast= False #Continuous Cast= False #Pearlite, %= 50 #Ferrite, %= 50 #ASTM Grain Size No. (Min to Max)= 8 to 10 #Carbon, %= 0.4 #Manganese, %= 0.8 #Phosphorus, %= 0.013 #Sulfur, %= 0.024 #Silicon, %= 0.28 #Copper, %= 0.03 #Nickel, %= 0.011 #Chromium, %= 0.04 #Molybdenum, %= 0.007 #Vanadium, %= 0.00 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.030 # SAE1038 AisiIt_19 BHN= 185 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 31002. KSI, 214. GPA K' = 190.5 KSI, 1314.MPA #YIELD,0.2%= 52. KSI, 359. MPA N' = 0.2128 #ULT. STRG.= 95. KSI, 652. MPA F. STRG COEF= 131.7 KSI, 908.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0901 #N = 0.0000 FAT DUCT COEF= 0.1762 #RED. IN AREA = 53.0 F.DUCT EXP, c=-0.4235 #T. FRAC. STG.= 152.4 KSI, 1051. MPA Exp Cyc Yld = 51. Ksi, 350.MPA #T. FRAC. STR.= 0.760 Fit Cyc Yld = 52. Ksi, 360.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 and long life points adjusted manually. FAC Sept2009 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .76 1 1051. 0 .756 213750. #Fitted_point manually 0.01510 500 535.8 0. 0.01260 213750. #Fitted_point 0.01173 1000 502.7 0. 0.00938 213750. #Fitted_point 0.00919 2000 471.6 0. 0.00698 213750. #Fitted_point 0.00675 5000 433.4 0. 0.00473 213750. #Fitted_point 0.00542 10000 406.6 0. 0.00352 213750. #Fitted_point 0.00440 20000 381.4 0. 0.00261 213750. #Fitted_point 0.00341 50000 350.4 0. 0.00177 213750. #Fitted_point 0.00285 100000 328.6 0. 0.00131 213750. #Fitted_point 0.00242 200000 308.1 0. 0.00098 213750. #Fitted_point 0.00198 500000 283.0 0. 0.00066 213750. #Fitted_point 0.00170 2000000 265.4 0. 0.00049 213750. #Fitted_point manually 0.00170 10000000 265.4 0. 0.00049 213750. #Fitted_point manually #