# 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 IN718 Tested at 650C 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= Test650C #Stress_units= mpa #Strain_units= strain #heat 1 2 3 #Sy= 925 avg of 910 827 1038 #Su= 1105 avg 1135 1091 1088 #eu= 0.145 engr.Strain #E= 163000 mpa taken from literature #FractureStrain= 0.261 #from %RA #FractureStress= 0 not reported #monotonic_K= 0 not reported #monotonic_n= 0 not reported #BHN= 331 converted from Su #%RA= 23. % average #StrAmpl 2Nf StsAmpl So PlasStrAmpl EMod #Heat1 #Heat2 #Heat3 # IN718 NickelBase BHN= 331 Fn= 0 # Monotonic Props. Cyclic Props. #ELAS. MOD.= 23641. KSI, 163. GPA K' = 153.7 KSI, 1059.MPA #YIELD,0.2%= 134. KSI, 925. MPA N' = 0.0693 #ULT. STRG.= 160. KSI, 1105. MPA F. STRG COEF= 142.2 KSI, 980.MPA #K = 0.0 KSI, 0. MPA F.STRG EXP, b=-0.0417 #N = 0.0000 FAT DUCT COEF= 0.3267 #RED. IN AREA = 23.0 F.DUCT EXP, c=-0.6026 #T. FRAC. STG.= 0.0 KSI, 0. MPA Exp Cyc Yld = 100. Ksi, 689.MPA #T. FRAC. STR.= 0.261 Fit Cyc Yld = 98. Ksi, 674.MPA #No. fatigue data points= 29 # # 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. 0.33267 1 1248.8 0. 0.32501 163000. #Fitted_point 0.22097 2 1187.0 0. 0.21369 163000. #Fitted_point 0.12947 5 1109.9 0. 0.12266 163000. #Fitted_point 0.08703 10 1054.8 0. 0.08055 163000. #Fitted_point 0.05902 20 1002.4 0. 0.05287 163000. #Fitted_point 0.03603 50 937.0 0. 0.03028 163000. #Fitted_point 0.02533 100 890.4 0. 0.01987 163000. #Fitted_point 0.01823 200 846.2 0. 0.01304 163000. #Fitted_point 0.01236 500 791.5 0. 0.00751 163000. #Fitted_point 0.00959 1000 753.0 0. 0.00497 163000. #Fitted_point 0.00773 2000 717.3 0. 0.00333 163000. #Fitted_point 0.00614 5000 674.6 0. 0.00200 163000. #Fitted_point 0.00537 10000 646.0 0. 0.00140 163000. #Fitted_point 0.00481 20000 620.7 0. 0.00101 163000. #Fitted_point 0.00431 50000 591.8 0. 0.00068 163000. #Fitted_point 0.00404 100000 573.1 0. 0.00052 163000. #Fitted_point 0.00382 200000 556.5 0. 0.00041 163000. #Fitted_point 0.00360 500000 537.0 0. 0.00030 163000. #Fitted_point 0.00346 1000000 523.5 0. 0.00025 163000. #Fitted_point 0.00334 2000000 510.8 0. 0.00020 163000. #Fitted_point 0.00319 5000000 494.7 0. 0.00015 163000. #Fitted_point 0.00309 10000000 482.9 0. 0.00013 163000. #Fitted_point 0.00300 20000000 471.3 0. 0.00010 163000. #Fitted_point 0.00288 50000000 456.2 0. 0.00008 163000. #Fitted_point 0.00279 100000000 444.8 0. 0.00006 163000. #Fitted_point 0.00271 200000000 433.6 0. 0.00005 163000. #Fitted_point 0.00261 500000000 418.9 0. 0.00004 163000. #Fitted_point 0.00253 1000000000 407.9 0. 0.00003 163000. #Fitted_point # #