Effect of load variation on the transition of crack path in delayed failure of 12Cr steel

Yoshiyuki Kondo, Masanobu Kubota, Tomohiro Nagasue

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The crack path of 12Cr martennltlc stainless steel tempered at low temperature is intergranular in the case of delayed failure and transgranular in the case of corrosion fatigue. The effect of varying load on the transition of crack path In delayed failure was examined. Delayed failure tent was done in pure water under triangularly varying load. The crack path was dependent on load frequency. Higher frequency resulted in transgranular crack and lower frequency resulted in intergranular crack. There was a threshold frequency below which intergranular crack could appear. An insertion of a few cycles of rapid loading into the low frequency loading which usually resulted in intergranular crack caused the transition into a transgranular crack.

    Original languageEnglish
    Pages (from-to)1249-1255
    Number of pages7
    JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
    Volume74
    Issue number9
    DOIs
    Publication statusPublished - Sep 2008

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

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