Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1579211 | Materials Science and Engineering: A | 2011 | 5 Pages |
Residual stresses were determined through the thickness of a 50 mm thick ferrite steel weld plate using neutron diffraction. Whereas the limiting penetration depth for iron-based alloys is about 25 mm in the most typical neutron diffractometers, we significantly enhanced the penetration depth up to 50 mm with 2 mm spatial resolution by using the neutron wavelength of 2.39 Å. The selected wavelength minimizes the total neutron cross-section and beam attenuation, thereby, maximizes the neutron fluxes at depth. Two-dimensional mapping of the residual stresses shows that significant amounts of the tensile longitudinal stresses (over 90% of yield strength) were developed along the heat-affected zone of the weld.
Research highlights► Determined residual stresses through the thickness of the 50 mm thick weld. ► Two-dimensional mapping of the longitudinal stress. Observed significant stresses along the heat-affected zone. ► Measured the maximum stress of 460 MPa at 40 mm below from the top surface.