# 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 650C 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= Test650C #Stress_units= mpa #Strain_units= strain #Sy= 958 mpa from fig.3 #Su= 1052 139 ksi from Fig.3 #eu= 0.141 #E= 169000 mpa taken from literature #FractureStrain= 0 not reported #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 286 converted from Su at 650C #%RA= 0 % not reported ## #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #heat-2 # IN718 NickelBase BHN= 286 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 24511. KSI, 169. GPA K' = 252.5 KSI, 1741.MPA #YIELD,0.2%= 139. KSI, 958. MPA N' = 0.1232 #ULT. STRG.= 153. KSI, 1052. MPA F. STRG COEF= 266.2 KSI, 1835.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.1062 #N = 0.0000 FAT DUCT COEF= 1.5368 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.8622 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 117. Ksi, 809.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 107. Ksi, 735.MPA #No. fatigue data points= 4 # # 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. 1.54765 1 1486.7 0. 1.53885 169000. #Fitted_point 0.85551 2 1395.6 0. 0.84725 169000. #Fitted_point 0.39284 5 1283.8 0. 0.38525 169000. #Fitted_point 0.21958 10 1205.3 0. 0.21245 169000. #Fitted_point 0.12402 20 1131.8 0. 0.11732 169000. #Fitted_point 0.05987 50 1041.9 0. 0.05370 169000. #Fitted_point 0.03565 100 979.0 0. 0.02986 169000. #Fitted_point 0.02213 200 920.5 0. 0.01669 169000. #Fitted_point 0.01285 500 849.5 0. 0.00782 169000. #Fitted_point 0.00919 1000 800.4 0. 0.00446 169000. #Fitted_point 0.00703 2000 754.9 0. 0.00257 169000. #Fitted_point 0.00539 5000 699.4 0. 0.00125 169000. #Fitted_point 0.00463 10000 660.0 0. 0.00072 169000. #Fitted_point 0.00409 20000 622.0 0. 0.00041 169000. #Fitted_point 0.00358 50000 572.6 0. 0.00019 169000. #Fitted_point 0.00327 100000 535.8 0. 0.00010 169000. #Fitted_point 0.00301 200000 499.9 0. 0.00005 169000. #Fitted_point 0.00271 500000 454.8 0. 0.00002 169000. #Fitted_point 0.00251 1000000 422.8 0. 0.00001 169000. #Fitted_point 0.00233 2000000 392.9 0. 0.00001 169000. #Fitted_point 0.00211 5000000 356.5 0. 0.00000 169000. #Fitted_point 0.00196 10000000 331.2 0. 0.00000 169000. #Fitted_point 0.00182 20000000 307.7 0. 0.00000 169000. #Fitted_point 0.00165 50000000 279.1 0. 0.00000 169000. #Fitted_point 0.00153 100000000 259.3 0. 0.00000 169000. #Fitted_point 0.00143 200000000 240.9 0. 0.00000 169000. #Fitted_point 0.00129 500000000 218.5 0. 0.00000 169000. #Fitted_point 0.00120 1000000000 203.0 0. 0.00000 169000. #Fitted_point # #