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Title: A residual stress study in similar and dissimilar welds

Residual strain distributions in similar and dissimilar welds were measured using neutron diffraction (ND) method. Then, using three strain components, three-dimensional stress states were calculated. The results were used to determine the effect of the martensitic phase transformation and material properties on residual stress (RS) distribution. It was observed that smaller longitudinal RS was induced in the low carbon steel side of dissimilar weld when compared to its similar weld. Also, it was found that the transverse RS near and within the weld zone (WZ) in dissimilar weld exhibited a distinctive trend, with tensile mode reaching the yield strength of the base metal (BM). In order to characterize the WZ in dissimilar weld, we deployed optical microscopy, hardness, and energy dispersive X-ray spectroscopy (EDAX). This study not only provides further insight into the RS state in similar and dissimilar welds; it also delivers important consequences of phase transformation in the latter case.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1]
  1. Clarkson Univ., Potsdam, NY (United States). Department of Mechanical and Aeronautical Engineering
  2. Carleton Univ., Ottawa, ON (Canada)
  3. Univ. of Bristol, Bristol (United Kingdom)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
OSTI Identifier:
1245352
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Welding Journal
Additional Journal Information:
Journal Volume: 95; Journal Issue: 4; Journal ID: ISSN 0043-2296
Publisher:
American Welding Society
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE Neutron Diffraction; Dissimilar Weld; Residual Strain and Stress