# Note! Periodic Overload Tests ! # SAE8822 ThruCarburized(Atmosphere) Simulated Case, Axial, HRc=58 # Low side Composition, Orig.Chem= 0.21C .81Mn .02P .026S .26Si # .18Cu .46Ni .50Cr .25Mo .005V .002Co .031Al .01Sn 15ppm_O # Gerdau MacSteel Heat 23524, ElecFurn, LadleRef, ConCast,HotRolled 20.6mm # Final Microstructure is Martensite with 9.1% Retained Austenite. # Inclusion TypeA (sulfide)=1.5T 0.0H TypeB(alumina)=0.5T 0.0H # TypeC(silicate)=0.0T 0.0H TypeD(globular)=1.0T 0.5H # IGO on surface. # Tested at U.Toledo 2009 #FileType= strain_life #DataType= raw #Name= SAE8822ThruCarb #Name= aisiIten.101 #Stress_units= MPa #Strain_units= strain #Sy= 1082 Note! did not reach 0.2% offset strain #Su= 1082 mpa Max stress reached #TrueFractureStress= 1082 #TrueFractureStrain= 0.0057 #E= 206100 mpa Avrg. of 4 initial loadings #%RA= 0 #monotonic_K= 1864.5 #monotonic_n= 0.072 #FailureDef= 50% load drop #BHN= 615 from HRc=58 #StrAmp 2Nf StsAmpl So PlsStrAmpl Emod 0.005000 1008 1022 13.0 0.000230 205900 #IGL 0.005000 1774 1024 -73.2 0.000210 203800 #IGL 0.005010 3640 1033 -75.2 0.000220 208100 #IGL #Tests above are Const.Ampl. #Tests below are Periodic Overload 0.00300 20814 618.4 206 0 206100 0.00250 27780 515.4 309 0 206100 0.00200 14910 412.3 412 0 206100 0.00150 22654 309.1 515 0 206100 0.00100 29654 206 618 0 206100 0.00100 67122 206.1 618 0 206100 0.00100 95996 206.1 618 0 206100 0.00075 58884 154.6 618 0 206100 0.00075 439620 154.2 670 0 206100 0.00060 4867596 123.5 700 0 206100 0.00050 1228932 102.9 721 0 206100 0.00050 3253548 103 721 0 206100 # #