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

    If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass

    Fracture Toughness in the Transition Regime for A533B-1 Steel: The Effect of Specimen Sidegrooving

    Published: 01 January 1990

      Format Pages Price  
    PDF (364K) 23 $25   ADD TO CART
    Complete Source PDF (13M) 611 $132   ADD TO CART

    Cite this document

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


    This report describes the results of an experimental test program to investigate the influence of specimen sidegrooving on the cleavage fracture toughness of A533B-1 steel. The work represents a companion study to a previous investigation into the effects of specimen size on the cleavage fracture toughness of the same A533B-1 plate material.

    Compact specimens were prepared in two sizes (12.5 and 25 mm thick) in the 0, 20 or 50% sidegrooved conditions. A total of 160 tests were performed in the transition regime with a minimum of 29 specimens being tested for each specimen size and depth of sidegrooving. Variations in cleavage fracture toughness were characterized using exponential curve fits to data across a temperature range and arithmetic mean values calculated at discrete test temperatures.

    The results show that sidegrooving has the effect of decreasing the mean level of cleavage toughness in the upper transition regime (high mean K levels) and increasing it in the lower transition regime (low mean K levels). These results are explained in terms of the competing effects of increased specimen constraint and reduced net thickness in sidegrooved specimens. Reduced resistance to ductile tearing in sidegrooved specimens is also shown to be a contributing factor to decreased toughness levels in the upper transition regime.


    brittle fracture, cleavage, sidegrooving, K, Ic, A533B, brittle-ductile transition, fracture toughness

    Author Information:

    Morland, E
    Senior Research Officer, Structural Performance Group, Northern Research Laboratories-AEA Technology, Risley, Warrington

    Committee/Subcommittee: E08.04

    DOI: 10.1520/STP18997S