A comparison of residual stress measurements on a linear friction weld using the contour method and neutron diffraction

Abstract

Linear Friction Welding (LFW) is a solid phase bonding process, which is being used commercially for fabrication of complex titanium parts. Like other welding processes, LFW joints contain tensile residual stresses that could negatively impact performance. This paper presents results from recent residual stress measurements on a test specimen containing a linear friction weld. Residual stress measurements were performed on the test specimen using the contour method and neutron diffraction. A comparison of the data from the two techniques is provided, which is favorable. In general, the residual stresses from the LFW process are shown to be high in magnitude and localized near the weld. © The Society for Experimental Mechanics, Inc. 2013.