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Roller Burnishing — A Cold Working Tool to Reduce Weld Induced Residual Stress

[+] Author Affiliations
John Martin

Lockheed Martin, Inc.

Paper No. PVP2002-1294, pp. 115-122; 8 pages
doi:10.1115/PVP2002-1294
From:
  • ASME 2002 Pressure Vessels and Piping Conference
  • Computational Mechanics: Developments and Applications
  • Vancouver, BC, Canada, August 5–9, 2002
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4652-0
  • Copyright © 2002 by ASME

abstract

The possibility of stress corrosion cracking (SCC) in regions of tensile residual stress introduced by weld deposited material has been a concern where environmental effects can reduce component life. Roller burnishing, a form of mechanical cold-working, has been considered as a means of providing for residual stress state improvements. This paper provides a computational evaluation of the roller burnishing process to address the permanent deformation needed to introduce a desirable residual stress state. The analysis uses a series of incrementally applied pressure loadings and finite element methodology to simulate the behavior of a roller burnishing tool. Various magnitudes of applied pressure loadings coupled with different size plates and boundary conditions are examined to assess the degree and depth of the residual compressive stress state after cold working. Both kinematic and isotropic hardening laws are evaluated.

Copyright © 2002 by ASME

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