# # Fitted Curve. # SAE4140 Specimens Quenched,Temp.Rc=41, 100%Martensite, # ElecFurn. Ingot Cast HotRollBarStock=57mm # TypeD=1.0_Inclusion Rating # UoWaterloo tests. # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE4140 #Name= AisiIt_67 #Stress_units= MPa #Strain_units= strain #Sy= 1314.0 #Su= 1445.8 #E= 205000 #monotonic_K= 1782.2 #monotonic_n= 0.049 #FractureStrain= .70 #FractureStress= 1755. #%RA=52.1 #MaterialForm= bar #FailureDef= 50% load drop #Hardness, Rockwell C= 41 #BHN= 381 #StrAmp 2Nf StsAmp So CalcPlasStr InitialModulus #Basic Oxygen= False #Electric Furnace= True #Vacuum Degas= False #Ladle Refined= True #Ingot Cast= True #Continuous Cast= False #Martensite, %= 100 #Carbon, %= 0.41 #Manganese, %= 0.96 #Phosphorus, %= 0.009 #Sulfur, %= 0.009 #Silicon, %= 0.23 #Copper, %= 0.20 #Nickel, %= 0.16 #Chromium, %= 0.99 #Molybdenum, %= 0.2 #Vanadium, %= 0.00 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.031 #Lead, %= 0.000 #Titanium, %= 0.003 #Calcium, %= 0.00 #Cobalt, %= 0.000 #Zirconium, %= 0.000 #Boron, %= 0.0004 #Tin, %= 0.009 #Nitrogen, ppm= 103 # SAE4140 AisiIt_67 BHN= 381 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29733. KSI, 205. GPA K' = 168.9 KSI, 1165.MPA #YIELD,0.2%= 191. KSI, 1314. MPA N' = 0.0454 #ULT. STRG.= 210. KSI, 1446. MPA F. STRG COEF= 173.0 KSI, 1193.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0340 #N = 0.0000 FAT DUCT COEF= 1.6947 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.7486 #T. FRAC. STG.= 254.5 KSI, 1755. MPA Exp Cyc Yld = 127. Ksi, 878.MPA #T. FRAC. STR.= 0.700 Fit Cyc Yld = 127. Ksi, 873.MPA #No. fatigue data points= 21 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Manually fit near Nf=1 FAC June09 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .70 1 1755. 0. .69 205000. #Fitted_point manually 0.01022 2000 912.9 0. 0.00577 205000. #Fitted_point 0.00724 5000 887.0 0. 0.00291 205000. #Fitted_point 0.00597 10000 867.8 0. 0.00174 205000. #Fitted_point 0.00518 20000 849.1 0. 0.00104 205000. #Fitted_point 0.00454 50000 824.7 0. 0.00052 205000. #Fitted_point 0.00424 100000 806.5 0. 0.00031 205000. #Fitted_point 0.00403 200000 788.4 0. 0.00018 205000. #Fitted_point 0.00382 500000 764.7 0. 0.00009 205000. #Fitted_point 0.00369 1000000 746.9 0. 0.00005 205000. #Fitted_point 0.00359 2000000 729.4 0. 0.00003 205000. #Fitted_point 0.00346 5000000 706.8 0. 0.00001 205000. #Fitted_point 0.00337 10000000 690.2 0. 0.00001 205000. #Fitted_point 0.00329 20000000 674.0 0. 0.00000 205000. #Fitted_point 0.00319 50000000 653.2 0. 0.00000 205000. #Fitted_point 0.00311 100000000 637.9 0. 0.00000 205000. #Fitted_point 0.00304 200000000 623.1 0. 0.00000 205000. #Fitted_point 0.00295 500000000 603.9 0. 0.00000 205000. #Fitted_point 0.00288 1000000000 589.9 0. 0.00000 205000. #Fitted_point #