# 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 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= Test22C #Stress_units= mpa #Strain_units= strain #Sy= 1120 avg of 1105 1125 1131 #Su= 1385 avg 1386 1389 1380 #eu= 0.202 engr. Strain #From Fig3 #E= 205000 mpa taken from literature #FractureStrain= 0.511 from %RA #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 401 converted from Su #%RA= 40 % #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #heat-1 #heat-2 #heat-3 # IN718 NickelBase BHN= 401 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 29733. KSI, 205. GPA K' = 427.6 KSI, 2948.MPA #YIELD,0.2%= 162. KSI, 1120. MPA N' = 0.1660 #ULT. STRG.= 201. KSI, 1385. MPA F. STRG COEF= 459.3 KSI, 3167.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.1265 #N = 0.0000 FAT DUCT COEF= 1.5384 #RED. IN AREA = 40.0 F.DUCT EXP, c=-0.7621 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 152. Ksi,1051.MPA #T. FRAC. STR.= 0.511 Fit Cyc Yld = 149. Ksi,1025.MPA #No. fatigue data points= 28 # # 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. 1.55385 1 2625.4 0. 1.54104 205000. #Fitted_point 0.92123 2 2436.6 0. 0.90935 205000. #Fitted_point 0.46380 5 2207.9 0. 0.45303 205000. #Fitted_point 0.27758 10 2049.4 0. 0.26758 205000. #Fitted_point 0.16744 20 1902.5 0. 0.15816 205000. #Fitted_point 0.08744 50 1724.7 0. 0.07903 205000. #Fitted_point 0.05463 100 1601.6 0. 0.04682 205000. #Fitted_point 0.03503 200 1487.5 0. 0.02777 205000. #Fitted_point 0.02053 500 1349.4 0. 0.01395 205000. #Fitted_point 0.01440 1000 1253.6 0. 0.00829 205000. #Fitted_point 0.01060 2000 1164.3 0. 0.00492 205000. #Fitted_point 0.00759 5000 1054.8 0. 0.00245 205000. #Fitted_point 0.00619 10000 977.2 0. 0.00143 205000. #Fitted_point 0.00522 20000 903.3 0. 0.00082 205000. #Fitted_point 0.00433 50000 810.4 0. 0.00038 205000. #Fitted_point 0.00384 100000 744.1 0. 0.00021 205000. #Fitted_point 0.00344 200000 681.7 0. 0.00011 205000. #Fitted_point 0.00301 500000 606.2 0. 0.00005 205000. #Fitted_point 0.00273 1000000 554.4 0. 0.00003 205000. #Fitted_point 0.00249 2000000 507.2 0. 0.00001 205000. #Fitted_point 0.00221 5000000 451.0 0. 0.00001 205000. #Fitted_point 0.00202 10000000 412.8 0. 0.00000 205000. #Fitted_point 0.00185 20000000 377.9 0. 0.00000 205000. #Fitted_point 0.00164 50000000 336.4 0. 0.00000 205000. #Fitted_point 0.00150 100000000 308.0 0. 0.00000 205000. #Fitted_point 0.00138 200000000 282.1 0. 0.00000 205000. #Fitted_point 0.00123 500000000 251.2 0. 0.00000 205000. #Fitted_point 0.00112 1000000000 230.1 0. 0.00000 205000. #Fitted_point # #