AN OVERVIEW OF SOME CURRENT RESEARCH ON WELDING RESIDUAL STRESSES AND DISTORTION IN THE U.S. NAVY

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Authors
  1. Blackburn, J.M.
  2. Kirk, M.
  3. Conrardy, P.C.
  4. DeBiccari, M.A.
  5. Brand, P.
  6. and others
Corporate Authors
Naval Surface Warfare Center Carderock Div, Bethesda MD (US);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
The paper describes some of the current U.S. Navy efforts geared toward managing residual stresses and distortion during weld fabrication. These efforts include model development, model verification, thermo-mechanical and thermo-physical property development, the generation of residual stress measurement data using x-ray and neutron diffraction techniques, the analysis of the effects of residual stresses on fatigue and stress corrosion cracking, and the use of weld residual stresses to achieve desired shapes in part manufacturing. Due to the complexities involved in weld residual stress development, significant emphasis has been placed on modeling. The importance of experimental data for model development and validation has been emphasized. It was shown that there were some differences between FE models and experimental results, but in general both were in good agreement. However, it was also shown that residual stress development is highly dependent upon the details of the fabrication process and the material properties and characteristics. Little difference between thermo-mechanically coupled and uncoupled FE results were demonstrated, but additional work is necessary since the work presented here did not include phase transformation effects or varying material properties representative of remelted or reheated material. TRUNCATED
Report Number
DREA-SR-97-002-PAP-39 — CONTAINED IN 98-00986
Date of publication
01 Oct 1997
Number of Pages
23
DSTKIM No
98-01025
CANDIS No
507242
Format(s):
Hardcopy;Document Image stored on Optical Disk

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