Near-surface residual stresses for parent rail and flash-butt weld sections of Algoma Intermediate Alloy rail and NSC DHH-370S premium rail were determined using the blind-hole-drilling method (ASTM E837-85). Plane strain fracture toughness values, corresponding to different web and flange toe cracking conditions, were determined for the test rails using ASTM E399-83. Fracture mechanics was then employed to compare critical web and toe crack sizes for the various parent rails and welds, for expected maximum load situations. Flash-butt welds are most susceptible to horizontal web failures, due largely to high tensile residual stresses following welding.


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    Title :

    Near-surface residual stresses for rail steels and flash-butt welds


    Additional title:

    Oberflächennahe Eigenspannungen in Schienenstählen und Stumpfschweißungen


    Contributors:
    Griffin, K. (author)


    Publication date :

    1993


    Size :

    10 Seiten, 9 Bilder, 15 Tabellen, 13 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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