A large data bank of information related to welded offshore structural steels has been used to assess the influence of weld metal strength mis-matching on the fracture resistance of these weldments, based on charpy impact test results, crack tip opening displacement CTOD values and wide plate results, along with supporting welding details, metallography and mechnical properties. The advantage of this approach is that there are sufficient tests for the values to be assessed against a normal statistical distribution, enabling trends to be identified despite appreciable scatter inherent in a smaller number of tests. The practical results are contrasted with the guidelines given in the British Standards Institution publication PD6493:1991 for initially assessing flaws in fusion welded joints in the as welded and post weld heat treated conditions. The important difference between specifying a required toughness Kmat and a required CTOD value deltamat has been demonstrated by considering the Level 1 assessment procedure. The improvement in toughness on post weld heat treating these joints has been quantified and distinguished from the practical benefits from weld metal strength overmatching.


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    Title :

    An assessment of weld mis-matching


    Additional title:

    Eine Abschätzung der Folge von nicht angepaßten Schweißverbindungen


    Contributors:
    Spurrier, J. (author) / Hancock, P. (author) / Chubb, J.P. (author)

    Published in:

    Publication date :

    1996


    Size :

    12 Seiten, 8 Bilder, 18 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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