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Research Papers: Materials and Fabrication

Effects of Clad and Base Metal Thickness on Residual Stress in the Repair Weld of a Stainless Steel Clad Plate

[+] Author and Article Information
Wenchun Jiang1

B. Yang

 College of Chemical Engineering, China University of Petroleum, Qingdao 266555, P. R. C

J. M. Gong

 School of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, P. R. C

S. T. Tu

Key Laboratory of Pressure System and Safety (MOE), School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, P. R. C

1

Corresponding author.

J. Pressure Vessel Technol 133(6), 061401 (Oct 19, 2011) (9 pages) doi:10.1115/1.4004565 History: Received May 10, 2010; Accepted April 18, 2011; Published October 19, 2011; Online October 19, 2011

This paper used finite element method (FEM) to predict the residual stresses in repair weld of a stainless steel clad plate. The effects of clad metal thickness and base metal thickness on residual stresses have been investigated. The results show that large residual stresses have been generated in weld metal and heat affected zone (HAZ). The clad metal and base metal thickness have a great effect on residual stresses. With clad metal thickness increase, the deformation and plastic strain are increased to relax some residual stress, which leads to a decrease in residual stress. The repair structure has an angular deformation for the shrinkage of weld metal. The strength of base metal is great larger than that of clad metal, and therefore, the base metal has a constraint on the shrinkage of clad metal. As the base metal thickness increase, this constraint function is enhanced, which leads to an increase in residual stress, which provides a reference for the repair welding of stainless steel clad plate.

Copyright © 2011 by American Society of Mechanical Engineers
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Figures

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Figure 1

The geometrical model of clad plate repair weld

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Figure 3

A butt-weld joint model to verify the FE method

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Figure 4

A comparison of the transverse (a) and longitudinal residual stress (b) by us and Chang [36]

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Figure 5

Residual stress contours of S11 (a), S22 (b), and S33(c)

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Figure 6

Residual stress distribution along the top surface

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Figure 7

Temperature histories of the center point in the 3rd and 4th pass

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Figure 8

Residual stress along path P1

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Figure 9

The residual stress contours of S11 (a), S22 (b), and S33(c) when the first layer was welded

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Figure 10

S11 (a), S22 (b), and S33 (c) distribution on the surface of the first layer

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Figure 11

S11 contours of with a clad metal thickness of 1 mm (a), 2 mm (b), 4 mm (c) and 5 mm (d)

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Figure 12

Effect of clad metal thickness on peak S11

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Figure 13

Effect of clad metal thickness on residual stress along P1

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Figure 14

The contour of deformation (a) and plastic strain (b)

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Figure 15

Effect of clad metal thickness on plastic strain (a) and deformation (b)

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Figure 16

S11 contours with a base metal thickness of 14 mm (a), 23 mm (b), and 29 mm (c)

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Figure 17

Effect of base metal thickness on residual stress along P1

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Figure 18

Effect of base metal thickness on deformation

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