Journal of Materials Science

, Volume 51, Issue 23, pp 10620–10631 | Cite as

Two-dimensional mapping of residual stresses in a thick dissimilar weld using contour method, deep hole drilling, and neutron diffraction

  • Wanchuck Woo
  • Gyu Baek An
  • Christopher E. Truman
  • Wenchun Jiang
  • Michael R. Hill
Original Paper
First Online:
Received:
Accepted:

Abstract

Residual stress variations were determined through the thickness of a 70-mm-thick ferritic–austenitic dissimilar steel weld using contour method, deep hole drilling, and neutron diffraction. The result shows that significant tensile stresses were distributed distinctly along the interface between ferritic and austenitic phases. The band of the large tensile stresses was about 8 mm wide and the magnitude reached 400 MPa, which is approaching 100 % of the yield strength of the base metal, near the top surface (about 15 % of the depth). It is attributed to the large difference (5.8 × 10−6 1/°C) of the thermal expansion coefficient between ferritic and austenitic steels of the interface. The microstructure analysis elucidates that the martensitic phase prevailed near the interface and results in microhardness increases.

Keywords

Residual Stress Ferritic Steel Residual Stress Measurement Contour Method Weld Centerline 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Notes

Acknowledgements

This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korean government (MSIP: Ministry of Science, ICT and Future Planning) (No. NRF-2012M2A2A6004262). It was also supported by POSCO Project No. 20156342. The authors would like to thank D. J. Smith, V. T. Em, A. T. DeWald, and E. J. Kingston for their help.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • Wanchuck Woo
    • 1
  • Gyu Baek An
    • 2
  • Christopher E. Truman
    • 3
  • Wenchun Jiang
    • 4
  • Michael R. Hill
    • 5
  1. 1.Neutron Science DivisionKorea Atomic Energy Research InstituteDaejeonSouth Korea
  2. 2.Department of Naval Architecture & Ocean EngineeringChosun UniversityGwangjuSouth Korea
  3. 3.Department of Mechanical EngineeringUniversity of BristolBristolUK
  4. 4.College of Chemical EngineeringUniversity of PetroleumQingdaoPeople’s Republic of China
  5. 5.Department of Mechanical and Aerospace EngineeringUniversity of CaliforniaDavisUSA

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