Analysis of 3D planar laminations in a welded section of API 5L X52 applying the finite element method

Martin J. Fernández-Cueto, Selene Capula-Colindres, Daniel Angeles-Herrera, Julio C. Velázquez, Gerardo Terán Méndez

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    Abstract

    The mechanical behavior of API 5L X52 steel with planar type laminations was studied in the present work. Planar laminations were proposed in the base metal (BM), heat affected zone (HAZ) and welding bead (WB). Three-dimensional finite element (FE) models, kinematic hardening and mechanical properties for BM, HAZ, and WB were activated in the finite element program. The results showed that crack propagation corresponds to the direction of the main stress. For a crack length (2a) of 10.01 mm, crack propagation may occur at the right crack tip towards the outer wall of the BM. For 2a of 15.12 mm, crack propagation was located on the right crack tip and propagates to the inner wall. For 2a of 17.12 mm, crack propagation was observed at the left crack tip and propagates to the outer wall in the BM. The results achieved by FEM agree when compared with real laminations in API 5L pipelines.

    Original languageEnglish
    Pages (from-to)17-31
    Number of pages15
    JournalSoldagem e Inspecao
    Volume23
    Issue number1
    DOIs
    StatePublished - 1 Jan 2018

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    Keywords

    • API 5L X52 pipeline
    • Failure pressure
    • Finite element
    • Planar laminations
    • Welded section

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