Influence of laser surface melting condition on intergranular corrosion resistance in type 316 stainless steel

Kenji Muto, Masahide Furukawa, JuN'Ichi Sakai, Makoto Yoshida

    Research output: Contribution to journalArticle

    Abstract

    When stainless steels are sensitized, intergranular corrosion resistance decreases and sensitization is assumed to be one of the causes of stress corrosion cracking under severe environment in nuclear reactors. For various stainless steels, Laser surface melting (LSM) with CO 2 laser have been reported. In this study YAG laser that is able to transmit energy with the optical fiber is used. Influence of LSM condition on intergranular corrosion resistance was examined. Experimental results indicated that by LSM sensitized Type 316 stainless steel restored intergranular corrosion resistance as the material after solution treatment. Moreover, The material that sensitized in low temperature (LTS) 500°C for 24 hours after LSM exhibited the same degree of intergranular corrosion resistance as the material after solution treatment. This would be caused by lower δ ferrite volume fraction in the solidified microstructure after LSM than that in arc welding metal.

    Original languageEnglish
    Pages (from-to)340-345
    Number of pages6
    JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    Volume73
    Issue number5
    DOIs
    Publication statusPublished - 2009 May

    Fingerprint

    intergranular corrosion
    Stainless Steel
    corrosion resistance
    Corrosion resistance
    stainless steels
    Melting
    Stainless steel
    melting
    Lasers
    lasers
    arc welding
    stress corrosion cracking
    nuclear reactors
    Electric arc welding
    Carbon Monoxide
    Stress corrosion cracking
    Nuclear reactors
    YAG lasers
    ferrites
    optical fibers

    Keywords

    • Laser surface melting
    • Low temperature sensitization (lts)
    • Re-sensitization
    • Sensitization
    • Type 316 stainless steel
    • Yttrium aluminum garnet (yag) laser

    ASJC Scopus subject areas

    • Mechanics of Materials
    • Materials Chemistry
    • Metals and Alloys
    • Condensed Matter Physics

    Cite this

    Influence of laser surface melting condition on intergranular corrosion resistance in type 316 stainless steel. / Muto, Kenji; Furukawa, Masahide; Sakai, JuN'Ichi; Yoshida, Makoto.

    In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 73, No. 5, 05.2009, p. 340-345.

    Research output: Contribution to journalArticle

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