Through-thickness distributions of residual stresses in an 80 mm thick weld using neutron diffraction and contour method
Source abstract
Abstract
Through-thickness distributions of residual stresses were determined in an 80-mm thick ferritic steel weld using neutron diffraction and contour method. A two- wavelength (1.55 and 2.39 A ˚ ) combined method, which is based on minimized cross-section and attenuation, enables us to measure residual stresses in such a thick specimen using neutron diffraction. Moreover, the results were complemented by contour method destructively. Signifi- cant tensile longitudinal stresses (up to 660 MPa approaching the yield strength) occur along the weld cen- terline within 10 mm from the top surface, while compressive transverse stresses (about −100 MPa) were found near the weld mid-thickness. Grain size, hardness, and charpy impact energy were further examined to sug- gest a critical location of fracture associated with residual stresses.
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Research context
OpenAlex topics: Welding Techniques and Residual Stresses · Non-Destructive Testing Techniques · Hydrogen embrittlement and corrosion behaviors in metals
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