# # Fitted Curve ! # SAE9254 Quenched +Tempered HRc=51 100%Martensite # Material cyclically softens substantially. # BasicOxygen, LadleRefined, ConCast(300x600 bloom), HotRolled to 46mm bar # Stelco. Spec. machined, heat treated Aust. 1700F, Oil Quenched, # Temp 715F and then final polish. # Test: UoWaterloo, A.Rteil and T.Topper, Apr2006 # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE9254 #Name= Quench+Temp #Name= AisiIt_86 #Stress_units= MPa #Strain_units= strain #Sy= 1841.0 #Su= 2020.0 #E= 205700 #monotonic_K= 2511.0 #monotonic_n= 0.050 #FractureStrain= .71 #FractureStress= 3644. #%RA= 51. #MaterialForm= bar #FailureDef= 50% load drop #Hardness, Rockwell C= 51 #Bhn= 496. #Basic Oxygen= True #Electric Furnace= False #Vacuum Degas= False #Ladle Refined= True #Ingot Cast= False #Continuous Cast= True #Martensite, %= 100 #Carbon, %= 0.57 #Manganese, %= 0.71 #Phosphorus, %= 0.011 #Sulfur, %= 0.009 #Silicon, %= 1.57 #Copper, %= 0.01 #Nickel, %= 0.01 #Chromium, %= 0.72 #Molybdenum, %= 0.005 #Vanadium, %= 0.01 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.028 #Titanium, %= 0 #Calcium, %= 0.00 #Zirconium, %= 0.000 #Boron, %= 0 #Nitrogen, ppm= 70 # SAE9254 Quench+Tem BHN= 496 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29834. KSI, 206. GPA K' = 617.3 KSI, 4256.MPA #YIELD,0.2%= 267. KSI, 1841. MPA N' = 0.1797 #ULT. STRG.= 293. KSI, 2020. MPA F. STRG COEF= 434.8 KSI, 2997.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0979 #N = 0.0000 FAT DUCT COEF= 0.1422 #RED. IN AREA = 51.0 F.DUCT EXP, c=-0.5445 #T. FRAC. STG.= 528.5 KSI, 3644. MPA Exp Cyc Yld = 202. Ksi,1393.MPA #T. FRAC. STR.= 0.710 Fit Cyc Yld = 203. Ksi,1397.MPA #No. fatigue data points= 18 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' # NOTE!! Adjusted shortlife and fatigue limit manually. FAC Aug2009 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .71 1 3644. 0. .692 205700 #Fitted_point manually 0.01072 1000 1534.9 0. 0.00326 205700. #Fitted_point 0.00919 2000 1428.8 0. 0.00225 205700. #Fitted_point 0.00771 5000 1301.1 0. 0.00138 205700. #Fitted_point 0.00686 10000 1213.1 0. 0.00096 205700. #Fitted_point 0.00618 20000 1132.0 0. 0.00067 205700. #Fitted_point 0.00545 50000 1034.0 0. 0.00042 205700. #Fitted_point 0.00499 100000 966.1 0. 0.00030 205700. #Fitted_point 0.00460 200000 902.9 0. 0.00021 205700. #Fitted_point 0.00415 500000 826.0 0. 0.00013 205700. #Fitted_point 0.00385 1000000 772.3 0. 0.00009 205700. #Fitted_point 0.00358 2000000 722.1 0. 0.00007 205700. #Fitted_point 0.00358 10000000 722.1 0. 0.00007 205700. #Fitted_point manually #