Article ID Journal Published Year Pages File Type
1579211 Materials Science and Engineering: A 2011 5 Pages PDF
Abstract

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.

Related Topics
Physical Sciences and Engineering Materials Science Materials Science (General)
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