# saedigcurve_v2.2.f starts. #Copyright (C) 2025 F.D.E. Committee #This data file is free software - you can redistribute it and/or #modify it under the terms of the GNU General Public License as #published by the Free Software Foundation; either version 2 of the #license, or (at your option) any later version. #This data file is distributed in the hope that it will be useful, #but WITHOUT ANY WARRANTY - without even the implied warranty of #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #GNU General PUblic License for more details. #You should have received a copy of the GNU General PUblic License #along with this program - if not, write to the Free Software #Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA #Try also their web site: http://www.gnu.org/copyleft/gpl.html # # Inconel IN718 Tested at 538C heats 1,2,3 # Specimens cut from annealed plates. Solution Anneal 940C 2h, air cool, # duplex age 718C 8h furnace cool, to 621C hold 8h, air cool. # Hourglass shape specimens. Diametral tests(?). # Emods not reported, taken from literature. Hardness converted from Su. # StsAmp vs PlasStrAmpl graph missing points. Check the original Ref. !! # Ref.: C.R.Brinkman and G.E.Korth, "Strain Fatigue and Tensile Behavior # Ref.: of Inconel 718 from Room Temperature to 650C," J.of Test. Eval., V2N4 # Ref.: July 1974, pp.249-259. Difficult to correlate Strain-Life-Stress. # Chem.: 3 heats similar but heat3 has only 0.06 Co, See Ref for details. # # #FileType= strain_life #DataType= fitted #TIMEcol= 0 #NAME= IN718 #NAME= NickelBased #Name= Test538C #Stress_units= mpa #Strain_units= strain #heat 1 2 3 #Sy= 950 avg of 932 1048 869 #Su= 1195 avg 1244 1216 1125 #eu= 0.203 engr.Strain #E= 171000 mpa taken from literature #FractureStrain= 0.315 #from %RA #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 355 converted from Su #%RA= 27. % average #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #Heat1 #Heat2 #Heat3 # IN718 NickelBase BHN= 355 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 24801. KSI, 171. GPA K' = 154.9 KSI, 1068.MPA #YIELD,0.2%= 138. KSI, 950. MPA N' = 0.0445 #ULT. STRG.= 173. KSI, 1195. MPA F. STRG COEF= 151.5 KSI, 1045.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0285 #N = 0.0000 FAT DUCT COEF= 0.6095 #RED. IN AREA = 27.0 F.DUCT EXP, c=-0.6417 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 117. Ksi, 810.MPA #T. FRAC. STR.= 0.315 Fit Cyc Yld = 117. Ksi, 808.MPA #No. fatigue data points= 21 # # 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. 0.61563 1 1172.6 0. 0.60877 171000. #Fitted_point 0.39667 2 1139.1 0. 0.39001 171000. #Fitted_point 0.22284 5 1096.3 0. 0.21643 171000. #Fitted_point 0.14481 10 1064.9 0. 0.13858 171000. #Fitted_point 0.09476 20 1034.5 0. 0.08871 171000. #Fitted_point 0.05498 50 995.5 0. 0.04916 171000. #Fitted_point 0.03710 100 966.9 0. 0.03144 171000. #Fitted_point 0.02560 200 939.2 0. 0.02010 171000. #Fitted_point 0.01642 500 903.7 0. 0.01113 171000. #Fitted_point 0.01226 1000 877.9 0. 0.00713 171000. #Fitted_point 0.00956 2000 852.9 0. 0.00457 171000. #Fitted_point 0.00737 5000 821.4 0. 0.00257 171000. #Fitted_point 0.00635 10000 799.0 0. 0.00168 171000. #Fitted_point 0.00566 20000 778.0 0. 0.00111 171000. #Fitted_point 0.00507 50000 752.8 0. 0.00067 171000. #Fitted_point 0.00478 100000 735.8 0. 0.00047 171000. #Fitted_point 0.00455 200000 720.3 0. 0.00034 171000. #Fitted_point 0.00434 500000 702.0 0. 0.00023 171000. #Fitted_point 0.00420 1000000 689.3 0. 0.00017 171000. #Fitted_point 0.00409 2000000 677.3 0. 0.00013 171000. #Fitted_point 0.00396 5000000 662.0 0. 0.00009 171000. #Fitted_point 0.00388 10000000 650.6 0. 0.00007 171000. #Fitted_point 0.00379 20000000 639.4 0. 0.00005 171000. #Fitted_point 0.00369 50000000 624.6 0. 0.00004 171000. #Fitted_point 0.00362 100000000 613.4 0. 0.00003 171000. #Fitted_point 0.00354 200000000 602.2 0. 0.00002 171000. #Fitted_point 0.00345 500000000 587.5 0. 0.00001 171000. #Fitted_point 0.00338 1000000000 576.5 0. 0.00001 171000. #Fitted_point # #