Numerical sensitivity analysis of welding-induced residual stress depending on variations in continuous cooling transformation behavior

Abstract

The usage of continuous cooling transformation (CCT) diagrams in numerical welding simulations is state of the art. Nevertheless, specifications provide limits in chemical composition of materials which result in different CCT behavior and CCT diagrams, respectively. Therefore, it is necessary to analyze the influence of variations in CCT diagrams on the developing residual stresses. In the present paper, four CCT diagrams and their effect on numerical calculation of residual stresses are investigated for the widely used structural steel S355J2+N welded by the gas metal arc welding (GMAW) process. Rather than performing an arbitrary adjustment of CCT behavior, four justifiable data sets were used as input to the numerical calculation: data available in the Sysweld database, experimental data acquired through Gleeble dilatometry tests, and TTT/CCT predictions calculated from the JMatPro and Edison Welding Institute (EWI) Virtual Joining Portal software. The performed numerical analyses resulted in noticeable deviations in residual stresses considering the different CCT diagrams. Furthermore, possibilities to improve the prediction of distortions and residual stress based on CCT behavior are discussed.

Keywords

welding simulation / GMAW / CCT sensitivity / welding residual stress

References

[1] Kannengiesser T, Boellinghaus T, Neuhaus M. Effects of the load history on the residual stress distribution in welded components. Welding in the World , 2006, 50(7-8): 11–17
[2] Dong P. Residual stresses and distortions in welded structures: A perspective for engineering applications. Science and Technology of Welding and Joining , 2005, 10(4): 389–398 10.1179/174329305X29465
[3] Ueda Y, Fukuda K, Nakacho K. Basic procedures in analysis and measurement of welding residual stresses by the finite element method. In: Nichols R W, ed. Residual Stresses in Welded Construction and their Effects, an international conference [held in] London , 15-17, November, 1977. Cambridge: Welding Institute, 1978, 27–37
[4] Karlsson L, Lindgren L E, Jonson M, . Modelling of residual stresses and distortion development. In: Bhadeshia H K D H, Cerjak H, eds. Mathematical Modelling of Weld Phenomena 3 , 1997, 571–589
[5] Taljat B, Radhakrishnan B, Zacharia T. Numerical analysis of GTA welding process with emphasis on post-solidification phase transformation effects on residual stresses. Materials Science and Engineering A , 1998, 246(1-2): 45–54 10.1016/S0921-5093(97)00729-6
[6] Ferro P, Porzner H, Tiziani A, . The influence of phase transformations on residual stresses induced by the welding process - 3D and 2D numerical models. Modelling and Simulation in Materials Science and Engineering , 2006, 14(2): 117–136 10.1088/0965-0393/14/2/001
[7] Mochizuki M, Toyoda M. Strategy of considering microstructure effect on weld residual stress analysis. Journal of Pressure Vessel Technology , 2007, 129(4): 619–629 10.1115/1.2767344
[8] Deng D, Murakawa H. Prediction of welding residual stress in multi-pass butt-welded modified 9Cr-1Mo steel pipe considering phase transformation effects. Computational Materials Science , 2006, 37(3): 209–219 10.1016/j.commatsci.2005.06.010
[9] Schwenk C, Rethmeier M, Dilger K, . Sensitivity analysis of welding simulation depending on material properties value variation. In: Bhadeshia H K D H, Cerjak H, Kozeschnik E, eds. Mathematical Modelling of Weld Phenomena 8 , 2007, 1107–1128
[10] Krauss G. Steels: Processing, Structure, and Performance. Materials Park , Ohio: ASM International, 2005
[11] Harrison P L, Farrar R A. Application of continuous cooling transformation diagrams for welding of steels. International Materials Review , 1989, 34(1): 35–51
[12] DIN EN 10025-2:2005. Hot Rolled Structural Steel Products - Part 2: Technical Specifications for Unalloyed Structural Steels. Berlin: Deutsches Institut für Normung e.V., 2005
[13] DIN EN 14341:2008. Welding Consumables - GMAW Electrodes for Unalloyed and Fine Grain Steels. Berlin: Deutsches Institut für Normung e.V., 2008
[14] DIN EN ISO 14175:2008. Welding Consumables - Gases and Gas Mixtures for Arc Welding and Related Processes. Berlin: Deutsches Institut für Normung e.V., 2008
[15] Hauk V. Structural and Residual Stress Analysis by Nondestructive Methods. Amsterdam: Elsevier, 1997
[16] Caron J, Heinze C, Schwenk C, . Effect of continuous cooling transformation variations on numerical calculation of welding-induced residual stresses. Welding Journal , 2010, 89(7): 151s–160s
[17] Goldak J, Chakravarti A, Bibby M. A new finite element model for welding heat sources. Metallurgical and Materials Transactions B , 1984, 15(2): 299–305
[18] Voss O. Investigation of factors’ significance on numerical simulation of welds. Dissertation for the Doctoral Degree . Shaker: Braunschweig University of Technology, 2001
[19] Leblond J B, Devaux J. A new kinetic model for anisothermal metallurgical transformations in steels including effect of austenite grain size. Acta Metallurgica , 1984, 32(1): 137–146 10.1016/0001-6160(84)90211-6
[20] Johnson W A, Mehl R F. Reaction kinetics in process of nucleation and growth. The AIME Transactions , 1939, 135: 416–458
[21] Avrami M. Kinetics of phase change. I: General theory. The Journal of Chemical Physics , 1939, 7(12): 103–112 10.1063/1.1750380
[22] Avrami M. Kinetics of phase change. II: Transformation-time relations for random distribution of nuclei. The Journal of Chemical Physics , 1940, 8(2): 212–224 10.1063/1.1750631
[23] Avrami M. Kinetics of phase change. III: Granulation, phase change, and microstructure. The Journal of Chemical Physics , 1941, 9(2): 177–184 10.1063/1.1750872
[24] Koistinen D P, Marburger R E. A general equation prescribing the extent of the austenite-martensite transformation in pure iron-carbon alloys and plain carbon steels. Acta Metallurgica , 1959, 7: 59–60 10.1016/0001-6160(59)90170-1
[25] Saunders N, Guo Z, Li X, . Using JMatPro to model materials properties and behavior. JOM Journal of the Minerals, Metals and Materials Society , 2003, 55(12): 60–65
[26] Saunders N, Guo Z, Li X, . The calculation of TTT and CCT diagrams for general steels. JMatPro Software Literature
[27] Guo Z, Saunders N, Miodownik A P, . Modelling material properties leading to the prediction of distortion during heat treatment of steels. MS&T Partner Societies: Materials Science & Technology 2006 Conference and Exhibition , 2006, 2076–2085
[28] Kirkaldy J S, Thomson B A, Baganis E A. In: Kirkaldy J S, Doane D V, eds. Hardenability Concepts with Applications to Steel. Metallurgical Society of AIME , 1978
[29] Bhadeshia H K D H. Thermodynamic analysis of isothermal transformation diagrams. Metal Science , 1982, 16(3): 159–166 10.1179/030634582790427217
[30] Babu S S. Acicular ferrite and bainite in steels. Dissertation for the Doctoral Degree. Cambridge , UK: University of Cambridge, 1992
[31] Ion J C, Easterling K E, Ashby M F. A second report on diagrams of microstructure and hardness for heat-affected zones in welds. Acta Metallurgica , 1984, 32(11): 1949–1955 10.1016/0001-6160(84)90176-7
[32] Seyffarth P, Meyer B, Scharff A. Gro?er Atlas Schwei?-ZTU-Schaubilder. Düsseldorf: DVS-Verlag, Fachbuchreihe Schwei?technik Band 110 , 1992
[33] Dong P, Hong J K, Bouchard P J. Analysis of residual stresses at weld repairs. International Journal of Pressure Vessels and Piping , 2005, 82(4): 258–269 10.1016/j.ijpvp.2004.08.004
[34] Deng D. FEM prediction of welding residual stress and distortion in carbon steel considering phase transformation effects. Materials & Design , 2009, 30(2): 359–366 10.1016/j.matdes.2008.04.052
[35] Wohlfahrt H. Report on the Round Robin Tests on Residual Stresses 2009. IIW-X-1668-09, IIW-XIII-2291-09, IIW-XV-1326-09. International Institute of Welding, Joint Working Group of Commission X/XIII/XV
[36] Heinze C, Kromm A, Schwenk C, . Welding residual stresses depending on solid-state transformation behaviour studied by numerical and experimental methods. Materials Science Forum , 2011, 681: 85–90 10.4028/www.scientific.net/MSF.681.85