# 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 718 Tested 538C heats 1,2,3 # Specimens cut from annealed plates. Solution Anneal 1038 2h, air cool, # duplex age 760C hold 10h,furnace cool to 649C 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= 993 avg of 1022 985 972 #Su= 1189 avg 1174 1230 1163 #eu= 0. #not reported #E= 178000 mpa taken from literature #FractureStrain= 0.315 from %RA #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 353 converted from Su #%RA= 27 % #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #heat-1 #heat-2 #heat-3 # IN718 NickelBase BHN= 353 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 25817. KSI, 178. GPA K' = 290.2 KSI, 2001.MPA #YIELD,0.2%= 144. KSI, 993. MPA N' = 0.1370 #ULT. STRG.= 172. KSI, 1189. MPA F. STRG COEF= 284.3 KSI, 1960.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0997 #N = 0.0000 FAT DUCT COEF= 0.8620 #RED. IN AREA = 27.0 F.DUCT EXP, c=-0.7279 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 124. Ksi, 854.MPA #T. FRAC. STR.= 0.315 Fit Cyc Yld = 131. Ksi, 904.MPA #No. fatigue data points= 25 # # 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. 0.87302 1 1714.9 0. 0.86338 178000. #Fitted_point 0.53074 2 1626.1 0. 0.52160 178000. #Fitted_point 0.27651 5 1515.9 0. 0.26800 178000. #Fitted_point 0.17004 10 1437.5 0. 0.16197 178000. #Fitted_point 0.10555 20 1363.2 0. 0.09790 178000. #Fitted_point 0.05744 50 1270.7 0. 0.05030 178000. #Fitted_point 0.03714 100 1204.9 0. 0.03037 178000. #Fitted_point 0.02472 200 1142.2 0. 0.01830 178000. #Fitted_point 0.01528 500 1063.6 0. 0.00930 178000. #Fitted_point 0.01118 1000 1006.7 0. 0.00552 178000. #Fitted_point 0.00857 2000 951.2 0. 0.00323 178000. #Fitted_point 0.00646 5000 878.8 0. 0.00152 178000. #Fitted_point 0.00545 10000 823.8 0. 0.00082 178000. #Fitted_point 0.00474 20000 768.2 0. 0.00042 178000. #Fitted_point 0.00407 50000 695.3 0. 0.00017 178000. #Fitted_point 0.00369 100000 643.1 0. 0.00008 178000. #Fitted_point 0.00338 200000 595.0 0. 0.00004 178000. #Fitted_point 0.00304 500000 538.1 0. 0.00001 178000. #Fitted_point 0.00281 1000000 499.7 0. 0.00001 178000. #Fitted_point 0.00261 2000000 464.7 0. 0.00000 178000. #Fitted_point 0.00238 5000000 422.8 0. 0.00000 178000. #Fitted_point 0.00221 10000000 394.0 0. 0.00000 178000. #Fitted_point 0.00206 20000000 367.4 0. 0.00000 178000. #Fitted_point 0.00188 50000000 335.0 0. 0.00000 178000. #Fitted_point 0.00176 100000000 312.5 0. 0.00000 178000. #Fitted_point 0.00164 200000000 291.6 0. 0.00000 178000. #Fitted_point 0.00149 500000000 266.1 0. 0.00000 178000. #Fitted_point 0.00139 1000000000 248.3 0. 0.00000 178000. #Fitted_point # #