# 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 427C 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= Test427C #Stress_units= mpa #Strain_units= strain #heat 1 2 3 #Sy= 1020 avg of 999 1044 1018 #Su= 1212 avg of 1183 1247 1206 #eu= 0 not reported #E= 178000 mpa taken from literature #FractureStrain= 0.329 not reported #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 286 converted from Su at 427C #%RA= 28 % ## #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #heat-2 # IN718 NickelBase BHN= 286 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 25817. KSI, 178. GPA K' = 236.6 KSI, 1631.MPA #YIELD,0.2%= 148. KSI, 1020. MPA N' = 0.0787 #ULT. STRG.= 176. KSI, 1212. MPA F. STRG COEF= 274.0 KSI, 1889.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0799 #N = 0.0000 FAT DUCT COEF= 6.4667 #RED. IN AREA = 28.0 F.DUCT EXP, c=-1.0154 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 145. Ksi,1001.MPA #T. FRAC. STR.= 0.329 Fit Cyc Yld = 145. Ksi,1001.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. 6.47728 1 1850.1 0. 6.46689 178000. #Fitted_point 3.20911 2 1753.7 0. 3.19926 178000. #Fitted_point 1.27106 5 1633.9 0. 1.26188 178000. #Fitted_point 0.63301 10 1548.8 0. 0.62431 178000. #Fitted_point 0.31714 20 1468.1 0. 0.30889 178000. #Fitted_point 0.12955 50 1367.9 0. 0.12187 178000. #Fitted_point 0.06759 100 1296.7 0. 0.06031 178000. #Fitted_point 0.03676 200 1229.2 0. 0.02985 178000. #Fitted_point 0.01822 500 1145.3 0. 0.01178 178000. #Fitted_point 0.01193 1000 1085.7 0. 0.00583 178000. #Fitted_point 0.00866 2000 1029.0 0. 0.00288 178000. #Fitted_point 0.00651 5000 958.2 0. 0.00113 178000. #Fitted_point 0.00565 10000 907.3 0. 0.00055 178000. #Fitted_point 0.00509 20000 858.6 0. 0.00027 178000. #Fitted_point 0.00458 50000 797.6 0. 0.00010 178000. #Fitted_point 0.00429 100000 754.3 0. 0.00005 178000. #Fitted_point 0.00403 200000 713.3 0. 0.00002 178000. #Fitted_point 0.00373 500000 662.7 0. 0.00001 178000. #Fitted_point 0.00353 1000000 626.9 0. 0.00000 178000. #Fitted_point 0.00333 2000000 593.1 0. 0.00000 178000. #Fitted_point 0.00310 5000000 551.2 0. 0.00000 178000. #Fitted_point 0.00293 10000000 521.5 0. 0.00000 178000. #Fitted_point 0.00277 20000000 493.4 0. 0.00000 178000. #Fitted_point 0.00258 50000000 458.6 0. 0.00000 178000. #Fitted_point 0.00244 100000000 433.9 0. 0.00000 178000. #Fitted_point 0.00231 200000000 410.5 0. 0.00000 178000. #Fitted_point 0.00214 500000000 381.5 0. 0.00000 178000. #Fitted_point 0.00203 1000000000 361.0 0. 0.00000 178000. #Fitted_point #