# 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 22C 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= Test22C #Stress_units= mpa #Strain_units= strain #Sy= 1127 #From Fig3 #Su= 1418 #From Fig3 #eu= 0.204 engr. Strain #From Fig3 #E= 205000 mpa taken from literature #FractureStrain= 0 not reported #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 414 converted from Su #%RA= 0 Not reported #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #Heat1 #Heat2 #Heat3 # IN718 NickelBase BHN= 414 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29733. KSI, 205. GPA K' = 215.1 KSI, 1483.MPA #YIELD,0.2%= 163. KSI, 1127. MPA N' = 0.0765 #ULT. STRG.= 206. KSI, 1418. MPA F. STRG COEF= 223.2 KSI, 1539.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0587 #N = 0.0000 FAT DUCT COEF= 1.6159 #RED. IN AREA = 0.0 F.DUCT EXP, c=-0.7673 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 134. Ksi, 922.MPA #T. FRAC. STR.= 0.000 Fit Cyc Yld = 148. Ksi,1021.MPA #No. fatigue data points= 12 # # 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. 1.62340 1 1936.2 0. 1.61396 205000. #Fitted_point 0.95658 2 1840.1 0. 0.94760 205000. #Fitted_point 0.47683 5 1720.2 0. 0.46844 205000. #Fitted_point 0.28269 10 1634.6 0. 0.27472 205000. #Fitted_point 0.16853 20 1553.2 0. 0.16096 205000. #Fitted_point 0.08628 50 1451.4 0. 0.07920 205000. #Fitted_point 0.05292 100 1378.5 0. 0.04619 205000. #Fitted_point 0.03322 200 1308.7 0. 0.02684 205000. #Fitted_point 0.01894 500 1220.9 0. 0.01298 205000. #Fitted_point 0.01307 1000 1157.4 0. 0.00742 205000. #Fitted_point 0.00954 2000 1096.0 0. 0.00420 205000. #Fitted_point 0.00690 5000 1017.7 0. 0.00193 205000. #Fitted_point 0.00575 10000 961.0 0. 0.00106 205000. #Fitted_point 0.00501 20000 907.2 0. 0.00058 205000. #Fitted_point 0.00438 50000 842.5 0. 0.00027 205000. #Fitted_point 0.00405 100000 799.3 0. 0.00015 205000. #Fitted_point 0.00380 200000 760.9 0. 0.00009 205000. #Fitted_point 0.00354 500000 716.1 0. 0.00005 205000. #Fitted_point 0.00338 1000000 685.6 0. 0.00003 205000. #Fitted_point 0.00323 2000000 657.2 0. 0.00002 205000. #Fitted_point 0.00305 5000000 622.1 0. 0.00001 205000. #Fitted_point 0.00292 10000000 597.2 0. 0.00001 205000. #Fitted_point 0.00280 20000000 573.3 0. 0.00000 205000. #Fitted_point 0.00265 50000000 543.2 0. 0.00000 205000. #Fitted_point 0.00255 100000000 521.6 0. 0.00000 205000. #Fitted_point 0.00244 200000000 500.8 0. 0.00000 205000. #Fitted_point 0.00232 500000000 474.6 0. 0.00000 205000. #Fitted_point 0.00222 1000000000 455.7 0. 0.00000 205000. #Fitted_point #