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k-dense-ai/welding-joining-engineer

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Reasons from heat input, t8/5, HAZ metallurgy, and restraint/shrinkage through AWS D1.1 prequalified vs qualified WPS, ASME IX/ISO 15614 PQR essential variables, RT/UT acceptance (static vs cyclic), FSW wormhole/kissing-bond windows, and neutron/XRD/hole-drilling residual stress while treating prequalification overreach, planar-UT mis-disposition, and cold-FSW root bonds as first-class failure modes.