# # Fitted Curve! Original data has much scatter! # SAE8695 with IGO 100%Martensite HRc=55 # Unusual tension/compression monotonic curves. # Cyclic stress-strain curve matches Compression test. Tensile curve much lower. # ElecFurnace, IngotCast, HotRolled to 25mm bar # Spec. machined then heat treated to "carburized" process without carbon. # Austenitized 1700F, Quenched in 180F Oil, Tempered 325F # Inclusions: TypeABC=none obsv., TypeD=4Heavy # Test: UoWaterloo M.Khalil and T.Topper Oct 2000 # saedigcurve_v2.2.f starts. #FileType= strain_life #DataType= fitted #Name= SAE8695 #Name= With-IGO #Name= AisiIt_41 #Stress_units= MPa #Strain_units= strain #Sy= 847.0 #Su= 979.0 #E= 195000 #monotonic_K= 2206.0 #monotonic_n= 0.180 #FractureStrain= 0.0097 #FractureStress= 991. #%RA= 0.97 #MaterialForm= bar #FailureDef= 50% load drop #Hardness, Rockwell C= 55 #BHN= 539 #Basic Oxygen= False #Electric Furnace= True #Vacuum Degas= False #Ladle Refined= False #Ingot Cast= True #Continuous Cast= False #Martensite, %= 100 #Carbon, %= 0.96 #Manganese, %= 0.86 #Phosphorus, %= 0.003 #Sulfur, %= 0.028 #Silicon, %= 0.26 #Copper, %= 0.02 #Nickel, %= 0.48 #Chromium, %= 0.52 #Molybdenum, %= 0.17 #Vanadium, %= 0.00 #Columbium/Niobium, %= 0.00 #Aluminum, %= 0.043 #Lead, %= 0.010 #Titanium, %= 0.001 #Calcium, %= 0.00 #Cobalt, %= 0.000 #Zirconium, %= 0.000 #Tin, %= 0.000 # SAE8695 AisiIt_41 BHN= 539 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 28282. KSI, 195. GPA K' =7200.7 KSI, 49647.MPA #YIELD,0.2%= 123. KSI, 847. MPA N' = 0.4710 #ULT. STRG.= 142. KSI, 979. MPA F. STRG COEF= 197.5 KSI, 1361.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0701 #N = 0.0000 FAT DUCT COEF= 0.0005 #RED. IN AREA = 1.0 F.DUCT EXP, c=-0.1488 #T. FRAC. STG.= 143.7 KSI, 991. MPA Exp Cyc Yld = 386. Ksi,2659.MPA #T. FRAC. STR.= 0.010 Fit Cyc Yld = 211. Ksi,1452.MPA #No. fatigue data points= 23 # # NOTE!! The Following Points are <b>FITTED DATA:</b>#NOTE!! Fitted Stress computed using Experm. K' and n' #Stress_Units= MPa # Total Strain 2Nf Stress Mean Plastic Strain Initial # Amp Amp Stress Amp Elastic Mod. 0.00746 1 1282.9 0. 0.00089 195000. #Fitted_point 0.00709 2 1242.1 0. 0.00072 195000. #Fitted_point 0.00662 5 1186.8 0. 0.00053 195000. #Fitted_point 0.00628 10 1144.0 0. 0.00042 195000. #Fitted_point 0.00597 20 1100.7 0. 0.00032 195000. #Fitted_point 0.00558 50 1043.2 0. 0.00023 195000. #Fitted_point 0.00530 100 999.8 0. 0.00017 195000. #Fitted_point 0.00504 200 956.8 0. 0.00013 195000. #Fitted_point 0.00471 500 901.2 0. 0.00009 195000. #Fitted_point 0.00448 1000 860.2 0. 0.00006 195000. #Fitted_point 0.00425 2000 820.5 0. 0.00005 195000. #Fitted_point 0.00398 5000 770.0 0. 0.00003 195000. #Fitted_point 0.00378 10000 733.5 0. 0.00002 195000. #Fitted_point 0.00360 20000 698.5 0. 0.00002 195000. #Fitted_point 0.00337 50000 654.6 0. 0.00001 195000. #Fitted_point 0.00320 100000 623.1 0. 0.00001 195000. #Fitted_point 0.00305 200000 593.0 0. 0.00001 195000. #Fitted_point 0.00285 500000 555.5 0. 0.00000 195000. #Fitted_point 0.00271 1000000 528.6 0. 0.00000 195000. #Fitted_point 0.00258 2000000 503.1 0. 0.00000 195000. #Fitted_point 0.00242 5000000 471.2 0. 0.00000 195000. #Fitted_point 0.00242 10000000 471.2 0. 0.00000 195000. #Fitted_point manually #