Weld residual stress plays an important role in the production and operating performance of ship structures. Various factors such as background noise, vibration, movement during ship construction, a layer of primer on the plate surface, and a layer of paint after ship construction bring challenges to measure weld residual stress in a shipyard. Three large test panels made of DH36, HSLA-65, and HSLA-80 steels were fabricated to examine the feasibility of using commercially-available portable x-ray diffraction (XRD) equipment to measure residual stress in a shipyard environment. Measured results show that portable XRD equipment provided reliable measurements, with the shipyard environment effects, on the panels made of DH-36 and HSLA-65. On the other hand, the primer affected the accuracy of measured residual stress on the panel made of HSLA-80, but electro-polishing could have been used to remove the primer to achieve a good measurement.
Weld Residual Stress Measurement in a Shipyard Environment
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Dull, Randy, Fisher, Charles R., Harbison, Michael, Huang, T.D., Rucker, Harry J., Scholler, Steven, Semple, Jennifer K., Yang, Yu-Ping, and Wei Zhang. "Weld Residual Stress Measurement in a Shipyard Environment" Paper presented at the SNAME Maritime Convention, Houston, Texas, October 2017.
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