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

Kenji Muto*, Masahide Furukawa, Ju N.Ichi Sakai, Makoto Yoshida

*この研究の対応する著者

研究成果: Article査読

抄録

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.

本文言語English
ページ(範囲)340-345
ページ数6
ジャーナルNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
73
5
DOI
出版ステータスPublished - 2009 5

ASJC Scopus subject areas

  • 凝縮系物理学
  • 材料力学
  • 金属および合金
  • 材料化学

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