Creep crack growth properties of welded joints for 12Cr ferritic steel

M. Tabuchi, J. C. Ha, A. T. Yokobori

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Type IV cracking in heat affected zone (HAZ) of weldment is a problem for advanced high Cr ferritic heat resisting steels. It is important to predict initiation and growth of creep voids and cracks in weldment. Present paper conducted the creep crack growth tests for the welded joint and base metal of tungsten strengthened 12Cr steel. The initiation and growth properties of Type IV crack in fine-grained HAZ of weldments were clarified. On the basis of experimental results, the programs that simulate Type IV fracture have been developed. The effect of multiaxial stress condition on vacancy diffusion and crack initiation for welded joints was discussed.

    Original languageEnglish
    Pages (from-to)47-54
    Number of pages8
    JournalStrength, Fracture and Complexity
    Volume4
    Issue number1
    Publication statusPublished - 2006 Jun 15

    Keywords

    • Creep crack growth
    • FEM
    • P122 steel
    • Type IV fracture
    • Welded joint

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

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