You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    Volume 45, Issue 2 (March 2017)

    Influence of Non-Metallic Inclusions on the Fracture-Toughness Properties on the Longitudinal Welding of an API 5L Steel Pipeline

    (Received 26 September 2014; accepted 8 October 2015)

    Published Online: 2017

    CODEN: JTEVAB

      Format Pages Price  
    PDF (1.5M) 8 $25   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word



    Abstract

    In previous works, it was demonstrated that the average fracture-toughness values were higher in the circumferential-longitudinal direction (CL) than in the circumferential-radial direction (CR) on the longitudinal submerged arc welding (SAW) in API 5L pipeline steel. Nevertheless, such differences in fracture-toughness values were attributed to the density distribution of microstructural phases and porosity, but the effect of non-metallic inclusions on this fracture property was not considered; therefore, the present work analyzed the effect of non-metallic inclusions on the fracture-toughness values by fractographic and electron diffraction scattered analyses. The results showed the presence of titanium (Ti), calcium (Ca), and aluminum (Al) constituents in the non-metallic inclusions for the CR direction of the pipeline. These elements tended to form compounds that promoted brittle-fracture by cleavage, decreasing the toughness properties of the weld. For the CL direction analysis, the elements presented on the non-metallic inclusions were manganese (Mn), silicon (Si), and sulfur (S), which promoted the nucleation and coalescence of cavities, all of which were typical for ductile fracture. Calculations on the KIC showed that the non-metallic inclusions with elements of Ti, Ca, and Al contributed to lower KIC values on the CR direction under analysis.


    Author Information:

    Angeles-Herrera, D.
    Instituto Mexicano del Petróleo, México, D.F., C.P.

    Albiter-Hernández, A.
    Instituto Mexicano del Petróleo, México, D.F., C.P.

    Cuamatzi-Meléndez, R.
    Instituto Mexicano del Petróleo, México, D.F., C.P.

    Morales-Ramirez, A. de J.
    Instituto Politécnico Nacional, México, D.F., C.P.


    Stock #: JTE20150061

    ISSN:0090-3973

    DOI: 10.1520/JTE20150061

    Author
    Title Influence of Non-Metallic Inclusions on the Fracture-Toughness Properties on the Longitudinal Welding of an API 5L Steel Pipeline
    Symposium ,
    Committee E08