Effects of hydrogen and weld defect on tensile properties of SUH660 and SUS316L welded joints

Masanobu Kubota, Ryosuke Komoda, Xuesong Cui, Hiroshi Wakabayashi, Yasuhisa Tanaka

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The effect of hydrogen on the tensile properties of the SUH660 and SUS316L different materials welded joints was characterized in conjunction with the joint shape and weld defects. The butt welded joint specimen without weld defect fractured at the SUS316L base material, and did not cause hydrogen embrittlement (HE). However, the failure position of the spigot-lap welded joint specimen moved from the SUS316L base material to the weld part when hydrogen charging was applied. This resulted in a significant reduction of the elongation. It was presumed that the HE was induced by the stress concentration due to the weld shape. The weld defect induced HE in both joints. The weld defect was produced by incomplete penetration. It also caused incomplete mixing of the weld metal. Consequently, filler nickel segregated around the weld defect, then HE occurred.

    Original languageEnglish
    Pages (from-to)713-718
    Number of pages6
    JournalInternational Journal of Mechanical Engineering and Robotics Research
    Volume8
    Issue number5
    DOIs
    Publication statusPublished - Sep 1 2019

    All Science Journal Classification (ASJC) codes

    • Control and Systems Engineering
    • Mechanical Engineering
    • Artificial Intelligence

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