Repair welding is a popular method to repair the leakage zone in tube-to-tubesheet joint of shell-tube heat exchangers. But the repaired residual stresses are generated inevitably and have a great effect on stress corrosion cracking (SCC). In this paper, the effects of repair welding on residual stress were studied by finite element method (FEM) and neutron diffraction measurement. The original weld residual stresses calculated by FEM showed good agreement with neutron diffraction measurement results. After repair welding, the transverse residual stresses change very little while the longitudinal residual stresses are increased in the repair zone. In the nonrepair zone, both the transverse and longitudinal stresses are decreased. The repair welding times have little effect on residual stress distribution. With the increase of welding length and heat input, the residual stresses increase. Repair opposite to the original welding direction is recommended because the opposite welding direction minimizes the residual stresses.
Issue Section:
Materials and Fabrication
References
1.
Xu
, S.
, and Zhao
, Y.
, 2013
, “Using FEM to Determine the Thermo-Mechanical Stress in Tube to Tube-Sheet Joint for the SCC Failure Analysis
,” Eng. Fail. Anal.
, 34
, pp. 24
–34
.2.
Liu
, L.
, Ding
, N.
, Shi
, J.
, Xu
, N.
, Guo
, W.
, and Wu
, C. M. L.
, 2016
, “Failure Analysis of Tube-to-Tubesheet Welded Joints in a Shell-Tube Heat Exchanger
,” Case Stud. Eng. Fail. Anal.
, 7
, pp. 32
–40
.3.
Bruno
, G.
, Dutta
, M.
, and Edwards
, L.
, 2005
, “Measurement of the Residual Stresses in a Stainless Steel Pipe Girth Weld Containing Long and Short Repairs
,” Int. J. Pressure Vessel Piping
,
82
(4
), pp. 299
–310
.4.
Dong
, P.
, Hong
, J. K.
, and Bouchard
, P. J.
, 2005
, “Analysis of Residual Stresses at Weld Repairs
,” Int. J. Pressure Vessel Piping
, 82
(4
), pp. 258
–269
.5.
Edwards
, L.
, Bouchard
, P. J.
, Dutta
, M.
, Wang
, D. Q.
, Santisteban
, J. R.
, Hiller
, S.
, and Fitzpatrick
, M. E.
, 2005
, “Direct Measurement of the Residual Stresses Near a ‘Boatshaped’ Repair in a 20 Mm Thick Stainless Steel Tube Butt Weld
,” Int. J. Pressure Vessel Piping
, 82
(4
), pp. 288
–298
.6.
Vega
, O. E.
, Hallen
, J. M.
, Villagomez
, A.
, and Contreras
, A.
, 2008
, “Effect of Multiple Repairs in Girth Welds of Pipelines on the Mechanical Properties
,” Mater. Charact.
, 59
(10
), pp. 1498
–1507
.7.
Kang
, S. K.
, Ho
, J. L.
, Bong
, S. L.
, In
, C. J.
, and Kwang
, S. P.
, 2009
, “Residual Stress Analysis of an Overlay Weld and a Repair Weld on the Dissimilar Butt Weld
,” Nucl. Eng. Des.
, 239
(12
), pp. 2771
–2777
.8.
Jiang
, W.
, Liu
, Z.
, Gong
, J. M.
, and Tu
, S. T.
, 2010
, “Numerical Simulation to Study the Effect of Repair Width on Residual Stresses of a Stainless Steel Clad Plate
,” Int. J. Pressure Vessel Piping
, 87
(8
), pp. 457
–463
.9.
Jiang
, W.
, Yang
, B.
, Gong
, J. M.
, and Tu
, S. T.
, 2011
, “Effects of Clad and Base Metal Thickness on Residual Stress in the Repair Weld of a Stainless Steel Clad Plate
,” ASME J. Pressure Vessel Technol.
, 133
(6
), p. 061401
.10.
Jiang
, W. C.
, Wang
, B. Y.
, Gong
, J. M.
, and Tu
, S. T.
, 2011
, “Finite Element Analysis of the Effect of Welding Heat Input and Layer Number on Residual Stress in Repair Welds for a Stainless Steel Clad Plate
,” Mater. Des.
, 32
(5
), pp. 2851
–2857
.11.
Jiang
, W.
, Xu
, X. P.
, Gong
, J. M.
, and Tu
, S. T.
, 2012
, “Influence of Repair Length on Residual Stress in the Repair Weld of a Clad Plate
,” Nucl. Eng. Des.
, 246
, pp. 211
–219
.12.
Jiang
, W.
, Luo
, Y.
, Zhang
, G.
, Woo
, W.
, and Tu
, S. T.
, 2013
, “Experimental to Study the Effect of Multiple Weld-Repairs on Microstructure, Hardness and Residual Stress for a Stainless Steel Clad Plate
,” Mater. Des.
, 51
, pp. 1052
–1059
.13.
Soanes
, T. P. T.
, Bell
, W.
, and Vibert
, A. J.
, 2005
, “Optimising Residual Stresses at a Repair in a Steam Header to Tubeplate Weld
,” Int. J. Pressure Vessel Piping
, 82
(4
), pp. 311
–318
.14.
Tait
, R. B.
, and Press
, J.
, 2001
, “An Experimental Study of the Residual Stresses, and Their Alleviation, in Tube to Tube-Sheet Welds of Industrial Boilers
,” Eng. Fail. Anal.
, 8
(1
), pp. 15
–27
.15.
Jiang
, W.
, Gong
, J.
, Chen
, H.
, and Tu
, S.
, 2006
, “Numerical Simulation of Welding Residual Stress of Tube-to-Tubesheet Joint in Heat Exchangers
,” Trans. China Weld. Inst.
, 27
(12
), pp. 1
–4.
(in Chinese).16.
Wang
, H. F.
, Sang
, Z. F.
, and Widera
, G. E. O.
, 2011
, “The Effect of the Welding on the Residual Contact Stress in the Expanded Zone of Expanded-Welded Tube-to-Tubesheet Joints
,” ASME J. Pressure Vessel Technol.
, 133
(6
), p. 061209
.17.
Xu
, S.
, and Wang
, W.
, 2013
, “Numerical Investigation on Weld Residual Stresses in Tube to Tube Sheet Joint of a Heat Exchanger
,” Int. J. Pressure Vessel Piping
, 101
, pp. 37
–44
.18.
Goldak
, K.
, Chakaravarti
, A.
, and Bibby
, M.
, 1984
, “A New Finite Element Model for Welding Heat Sources
,” Metall. Trans. B
, 15
(2
), pp. 299
–305
.19.
Withers
, P. J.
, Preuss
, M.
, Steuwer
, A.
, and Pang
, J. W. L.
, 2001
, “Methods for Obtaining the Strain-Free Lattice Parameter When Using Diffraction to Determine Residual Stress
,” J. Appl. Crystallogr.
, 40
(5
), pp. 891
–904
.20.
Cho
, J. R.
, Lee
, B. Y.
, Moon
, Y. H.
, and Tyne
, C. J. V.
, 2004
, “Investigation of Residual Stress and Post Weld Heat Treatment of Multi-Pass Welds by Finite Element Method and Experiments
,” J. Mater. Process. Technol.
, 155–156
, pp. 1690
–1695
.21.
Altenkirch
, J.
, Steuwer
, A.
, Peel
, M.
, Richards
, D. G.
, and Withers
, P. J.
, 2008
, “The Effect of Tensioning and Sectioning on Residual Stresses in Aluminium AA7749 Friction Stir Welds
,” Mater. Sci. Eng. A
, 488
(1–2
), pp. 16
–24
.22.
Karabin
, M. E.
, Barlat
, F.
, and Becker
, R.
, 2003
, “A Simplified Analysis of the Effect of Microstructure Gradient on the Stress Relief of Aluminum Plates and Extrusions
,” Int. J. Mech. Sci.
, 45
(9
), pp. 1483
–1503
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