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This content will become publicly available on April 6, 2017

Title: Fabrication of thick multilayered steel structure using A516 Grade 70 by multipass friction stir welding

Here, we fabricated a thick-sectioned multilayered steel structure by multipass friction stir welding on A516 Grade 70 steel. Tensile strength of the multilayered samples was comparable to that of the base metal. Failure was located in the base metal when a defect-free sample was tested. Charpy impact toughness was higher in the stir zone and heat affected zone than in the base metal. For higher microhardness values were found in the stir zone and heat affected zone than the base metal due to grain refinement and modification of the microstructures. As a result, improved mechanical properties compared to the base metal were found in the weld zones of friction stir welded A516 Grade 70 steel.
 [1] ;  [2] ;  [3] ;  [1] ;  [1] ;  [1] ;  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. MegaStir Technologies LLC, Provo, UT (United States)
  3. Consultant, Midway, UT (United States)
Publication Date:
OSTI Identifier:
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Science and Technology of Welding and Joining
Additional Journal Information:
Journal Volume: 21; Journal Issue: 7; Journal ID: ISSN 1362-1718
Taylor & Francis
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
36 MATERIALS SCIENCE friction stir weld; multilayer; high strength low alloy steel; mechanical properties