Papers by Keyword: Groove Angle

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Authors: Young Doo Kwon, W.K. Choi, Hyun Wook Kwon, H.S. Choo
Abstract: The time-dependent distributions of temperature and stresses in a box-column welded from ultra thick plates with a center segregation were analyzed using the commercial finite element package SYSWELD+ for several types and angles of groove. The welding method used in the current study was SAW(submerged arc welding), which was initially simulated using the commercial finite element package MSC/MARC, combined with a user-defined subroutine, to identify the weld thermal cycle. The major points of investigation were the optimum type and angle of groove that would minimize the weld stress, especially at the center segregation. A nonlinear transient heat transfer analysis was accomplished. The thermal properties, i.e. conductivity and specific heat, were found to be temperature dependent, plus the effects arising from a phase change, convection, and radiation were also taken into account.
387
Authors: Rouhollah Mohsen Pezeshkian, Peyman Shayanfar, Saiedeh Shafaiepour
Abstract: This study investigates mechanical and microstructural properties of P460N steel after Shielded Metal Arc Welding (SMAW). Three specimens with groove angles of 45 °, 60 ° and 75° were prepared and welded for this purpose. Tensile strength test, impact test, grain size test, macro and micro hardness test and metallographic test were performed on weld metal (WM), Heat Affected Zone (HAZ) and Base Metal (BM) and the results were compared. In the specimen with groove angle of 60°, yield strength was more than the base metal. Impact energy results in HAZ were different, so that HAZ areas in the specimens with 45° and 60° groove angles have less impact energy compared to the base metal but in the specimen with 75° groove angle, impact energy was more than the base metal. This increase can be due to formation of intermetallic compounds. After checking mechanical and microstructural properties of all the specimens, the groove angle of 60° was confirmed to be used at designing and construction of a reservoir with thickness of 14mm and working pressure of 40 bars.
1551
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