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
    STP1417

    Creep Crack Growth in the Base Metal and a Weld Joint of X20CrMoV 12 1 Steel Under Two-Step Loading

    Published: 01 January 2003


      Format Pages Price  
    PDF (392K) 18 $25   ADD TO CART
    Complete Source PDF (15M) 774 $275   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

    The creep crack growth behavior in the base metal and a weld joint of X20CrMo 12 1 steel has been investigated under two-step loading at 545°C using 1/2T CT specimens. The crack growth process has been simulated using finite element analyses to examine the transient crack tip field. The results are compared with those under constant loading. In step-up loading, crack growth accelerated greatly after load change due to the effect of prior creep damage and reduced stress relaxation. In step-down loading, further creep-damage at the crack tip nearly ceased after load change due to a sharp drop in crack tip stress, leading to crack arrest for a substantial period of time. Crack growth eventually resumed as the crack tip stress increased by redistribution of the creep strain. Crack growth rates are found to correlate well with C*(t) for both base metal and weld specimens.

    Keywords:

    X20CrMoV 12 1 steel, creep crack growth, heat affected zone, C*(t)


    Author Information:

    Kim, KS
    Professor, Pohang University of Science and Technology, Pohang,

    Lee, NW
    Engineer, Hyundai Motor Company, Kyunggi-do,

    Chung, YK
    Research engineer, Research and Development Center, Korea Heavy Industries & Construction Co., Ltd., Changwon,


    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP11086S