SAE Standard Fatigue Data File format

#SAE Standard Fatigue Data File format #
Pick one: #FDE_plot #FDE_fit # #
#
# SAE8620 Thru Carburized 75%Bainite Rc=58
# Material cyclically hardens to elastic conditions. MacSteel ht. m10367
# ElecFurnace, LadleRefined, ConCast(152x152mm) HotRolled to 29.7mm bar
# Original Chem.= 0.21wt%C .93Mn .009P .032S .25Si .15Cu .46Ni .50Cr
# .20Mo 0V 0Nb .024Al 0Pb .002Ti 0Ca .01Co 0Zr .0003B .01Sn
# 9ppm_O 63ppm_N
# Specimens machined from the cylindrical bars and case carburized then
# reaustenitized and isothermally transformed at 450F for 150min. to 
# achieve 25% Martensite and 75%Bainite microstructure. Surface hardness 
# Rc=60 decreases to Rc=54 at core. 
# Inclusions: TypeA=1.2T, TypeB=0.5T 0.3H, TypeC=0.2T, TypeD=1.5T 0.5H
# Test: UoWaterloo, A.Rteil and T.Topper

#FileType= strain_life
#DataType= raw
#Name= SAE8620
#Name= AisiIt_90
#Name= ThruCarburized
#Stress_units= MPa
#Strain_units= strain
#Sy= 1314.0
#Su= 1883.0
#Emod= 179350.  Average of all initial modulii
#was reported as #E= 202500 possibly from a tensile test?
#monotonic_K= 4891.0
#monotonic_n= 0.212
#FractureStrain= 0.022
#FractureStress= 1883
#%RA= 0 (not measurable)
#MaterialForm= bar
#FailureDef= 50% load drop
#Hardness, Rockwell C= 58
#BHN= 615

#StrAmp     2Nf     StsAmp So PlasStrInitMod
0.00798       2354   1410   0   0   176692   #4 retest of #3 Surface initiation
0.00798       3646   1399   0   0   175313   #8 retest of #7 Surface initiation
0.0078        4406   1360   0   0   174359   #1  Surface init.
0.00646      13146   1133   0   0   175387   #19 Surface init.
0.00628      16192   1104   0   0   175796   #12 retest of #11 Surface init.
0.00625      17066   1104   0   0   176640   #10 retest of #9  Surface init.
0.00453      28142    810   0   0   178808   #16 Possible #fisheye near surf.
0.0045       38730    803   0   0   178444   #15 Large #fisheye at center.
0.00497      38828    900   0   0   181087   #2  Surface init.
0.00449      85544    836   0   0   186192   #5  Possible number of internal #fisheye
0.00399     114526    730   0   0   182957   #6  Large #fisheye, perhaps multiple
0.00497     178964    887   0   0   178471   #17 Surface init.
0.00399     699662    729   0   0   182707   #13 Large #fisheye in center
0.00499     718456    892   0   0   178758   #18 Large #fisheye at 1/3 diam.
0.00399    6488912    730   0   0   182957   #14 Huge #fisheye at 1/4 diam.
0.00375   10000000    675   0   0   180000   #Runout  #11
0.00375   10000000    687   0   0   183200   #Runout  #7
0.00374   10000000    675   0   0   180481   #Runout  #9
#Average Emod turns out to be 179350
#
#Electric Furnace= True
#Vacuum Degas= False
#Ladle Refined= True
#Ingot Cast= False
#Continuous Cast= True
#Bainite, %= 75
#Martensite, %= 25
#Carbon, %= 0.21
#Manganese, %= 0.83
#Phosphorus, %= 0.009
#Sulfur, %= 0.032
#Silicon, %= 0.25
#Copper, %= 0.15
#Nickel, %= 0.46
#Chromium, %= 0.5
#Molybdenum, %= 0.2
#Vanadium, %= 0.00
#Columbium/Niobium, %= 0.00
#Aluminum, %= 0.024
#Lead, %= 0.001
#Titanium, %= 0.002
#Calcium, %= 0.00
#Cobalt, %= 0.006
#Zirconium, %= 0.001
#Boron, %= 0.0003
#Tin, %= 0.006
#Oxygen, ppm= 9
#Nitrogen, ppm= 63
#
#