In a new paper, EWI’s Yu-Ping Yang and colleagues discuss the significant problem of stress corrosion cracking of welded joints of 6005A-T6 aluminum alloy in high-speed trains, and demonstrate how ultrasonic impact treatment can control the residual stress of the welded joints.
Read MoreLaser powder bed fusion (L-PBF) is an additive manufacturing process in which a three-dimensional component is built using a layer-by-layer approach. Highly localized heating and repeated thermal cycles induce temperature gradients in the part, resulting in residual stresses and deformation. Cracking, porosity, and lack of fusion may also occur. While the L-PBF process can be […]
Read MoreEWI has recently completed an internal research project on modeling of tensile residual stresses extending more than 5 weld widths from the weld joint. The finite element modeling showed that welding residual stresses could be high rather far away from a weld between two stiff steel components, compared to expectations embodied in API 579/ASME FFS-1. […]
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