Validation of three-dimensional finite element model for electron beam welding of Inconel 718

Abstract

A three-dimensional finite element model for the prediction of the distortion and residual stresses induced during electron beam welding is described. The model is validated by butt welding experiments on two Inconel 718 plates. A particular effort is made to determine a good model for the heat input. A combined conical and double ellipsoid heat source is used to model the deep penetration characteristic of the electron beam and this source is calibrated using the results from a separate thermodynamic simulation, using the ELSIM finite difference code. Parallel computation is used to reduce the overall simulation time in the coupled thermomechanical simulation of welding. The agreement between calculations and experiments is good with respect to the residual stresses. Measured and computed deformations agree qualitatively although they differ in magnitude.

Keywords

SIMULATION ELECTRON BEAM WELDING HEAT SOURCE VALIDATION INCONEL 718 PARALLEL COMPUTATION

Get full access to this article

View all access options for this article.

References

Berglund

and Alberg

: Sci. Technol. Weld. Joining, 2005, 10, (6), 653–665.

Sudnik

, Radaj

and Erofeew

: J. Phys. D, Appl. Phys., 1996, 29, 2811–2817.

Goldak

J. A.

, Chakravarti

and Bibby

: Metall. Trans. B, 1984, 15B, 299–305.

Lundback

: Proc. 6th Seminar on ‘Numerical analysis of weldability’, Graz, Austria, 0ctober2001, Institute of Materials, 1113–1121.

Lindgren

L.-E.

, Alberg

and Domkin

: Proc. 7th Int. Conf. on ‘Computational plasticity’; 2003, Barcelona, Spain, CIMNE (CD ROM).

Alberg

and Berglund

: Comput. Meth. Appl. Mech. Eng., 2003, 192, 5189–5208.

‘ABAQUS/Standard user's manual’, Vol . 2; 2000, Pawtucket, RI, USA, Hibbit, Karlsson & Sorensen Inc.

‘Marc – theory and user information’ ; 2003, Palo Alto, CA, USA, MSC. Software.

Goldak

J. A.

, Patel

, Bibby

and Moore

: Proc 61st Panel Meeting ‘AGARD workshop – structures and materials’, Oberammergau, Germany, September 1985, AGARD.

10.

Mills

K. C.

: ‘Recommended values of thermophysical properties for selected commercial alloys’; 2002, Abington, UK, Woodhead Publishing/ASM International.

11.

Zhang

W.J.

, Reddy

B. V.

and Deevi

S. C.

: Scr. Mater., 2001, 45, 645–651.

12.

Busch

W. B.

, Draugelates

and Kunze

H. D.

: Proc. Conf. on ‘High temperature materials for power engineering’, 1471–1480; 1990, Berlin, Kluwer Academic/Springer.

13.

Babu

V. S.

, Pavlovic

A. S.

and Seehra

S. S.

: Proc. Int. Symp. on ‘Superalloys 718, 625, 706 and various derivatives’, 689–693; 1997, Warrendale, PA, USA, The Minerals, Metals and Materials Society.

14.

Tekriwal

and Mazumder

: ASME J. Eng. Mater. Technol., 1991, 113, 336–343.

15.

Stone

H. J.

, Roberts

S. M.

and ReeD

R. C.

: Metall. Mater. Trans. A, 2000, 31A, 2261–2273.

16.

Lindgren

L.-E.

: Proc. 6th Seminar on ‘Numerical analysis of weldability’, Graz, Austria, October 2001, Institute of Materials, 491–518.

17.

Bergheau

J.-M.

, Vincent

, Leblond

J.-B.

and Jullien

J.-F.

: Sci. Technol. Weld. Joining, 2004, 9, 323–330.