# # Fitted Curve ! # SAE9254 Al Q+T Rc=58, 100%Martensite # Material cyclically softens slightly. # BasicOxygen, LadleRefined, ConCast(300x600mm) HotRolled to 18.8mm bar # Spec. machined then heat treated: Austen. 1700F in nitrogen, # Oil Quenched, Tempered at 715F # Inclusions: TypeA= 1.5, TypeB,C=0, TypeD=1.5 # Test: UoWaterloo, M.Khalil and T.Topper July1999 # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE9254_AL #Name= AisiIt_35 #Stress_units= MPa #Strain_units= strain #Sy= 2270.0 #Su= 2450.0 #E= 205000 #monotonic_K= 3322.0 #monotonic_n= 0.042 #FractureStrain= 0.052 #FractureStress= 2483. #MaterialForm= bar #FailureDef= 50% load drop #BHN= 584 #Hardness, Rockwell C= 58 #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, %= 0.01 #Vanadium, %= 0.01 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.028 #Nitrogen, ppm= 70 # SAE9254_AL AisiIt_35 BHN= 584 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29733. KSI, 205. GPA K' = 725.2 KSI, 5000.MPA #YIELD,0.2%= 329. KSI, 2270. MPA N' = 0.1417 #ULT. STRG.= 355. KSI, 2450. MPA F. STRG COEF= 740.3 KSI, 5104.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.1351 #N = 0.0000 FAT DUCT COEF= 1.1564 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.9539 #T. FRAC. STG.= 360.1 KSI, 2483. MPA Exp Cyc Yld = 301. Ksi,2073.MPA #T. FRAC. STR.= 0.052 Fit Cyc Yld = 277. Ksi,1908.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 short life and fatigue limit fitted curve manually. FAC Aug2009 #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. .052 1 2483. 0. .0399 205000. #Fitted_point manually 0.01138 1000 1912.4 0. 0.00205 205000. #Fitted_point 0.00974 2000 1791.9 0. 0.00099 205000. #Fitted_point 0.00822 5000 1619.0 0. 0.00032 205000. #Fitted_point 0.00735 10000 1481.9 0. 0.00012 205000. #Fitted_point 0.00662 20000 1348.9 0. 0.00004 205000. #Fitted_point 0.00581 50000 1188.6 0. 0.00001 205000. #Fitted_point 0.00527 100000 1080.5 0. 0.00000 205000. #Fitted_point 0.00479 200000 982.7 0. 0.00000 205000. #Fitted_point 0.00423 500000 867.4 0. 0.00000 205000. #Fitted_point 0.00385 1000000 789.6 0. 0.00000 205000. #Fitted_point 0.00351 2000000 718.8 0. 0.00000 205000. #Fitted_point 0.00310 5000000 635.0 0. 0.00000 205000. #Fitted_point 0.00310 10000000 635.0 0. 0.00000 205000. #Fitted_point manually #