Assessment of residual stress of welded structural steel plates with or without post weld rolling using the contour method and neutron diffraction

Integration of Deformation Processing with Additive Manufacture of Ti-6Al-4V Components for Improved β Grain Structure and Texture

“…Similar stresses are accrued with a single track deposition in traditional welds, and have previously been relieved by imparting a compensating plastic strain by treatments such as peening [14] and rolling [15]. However, when a rolling step was introduced into a wire-plasma AM process, in addition to a decrease in residual stresses, a large reduction in the prior β grain size was observed accompanied by a weakening of the β <100> fibre texture [16].…”

Assessment of residual stress of 7050-T7452 aluminum alloy forging using the contour method

“…Data smoothing must deal with surface roughness and EDM cutting artifacts as these effects are amplified during the process of calculating stress from displacements [21]. As a result, this step effectively becomes critical for accurate evaluation of stresses using the contour method [22]. In the present study, MATLAB R2012b was used for curve fitting using linear extrapolation with 20 mm knot spacing.…”

“…Difference in stresses may also result from displacements measurement errors. During data processing in the contour method, smoothing knots are not tuned a priori, some level of uncertainty is induced in both the smoothed surface and consequently in residual stress [22].…”

Experimental Techniques to Investigate Residual Stress in Joints

“…CM has found a number of applications; some of them are of particular relevance such as butt joints of S355 structural steel [28], 80-mm thick ferritic steel welds [24], 70-mm thick dissimilar metal (ferritic to austenitic) welds [15] and ferritic steel plates welded using low and very high heat input processes [25], friction stir welds between 25.4-mm thick plates of aluminum alloys 7050-T7451 and 2024-T351 [29], 2024-T351 aluminum alloy VPPA welds [19], welded Tee-joints [22], welds of 13% Cr-4% Ni steel [30,31], 316L stainless steel bead-on-plate specimens [32] and AA6061-T6 aluminum alloy friction stir butt welds [33].…”