Effect of nitrogen on σ transformation in duplex stainless steel weld metal

Y. S. Sato, H. Kokawa, T. Kuwana

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Duplex stainless steels were gas tungsten arc welded without filler material in various Ar-N2 mixed gas atmospheres. Weld metals having different nitrogen contents were annealed at 900-1300 K to examine the single effect of nitrogen on the σ transformation. Nitrogen content of the weld metal did not influence the nose temperature and the time for σ initiation in time-temperature-precipitation diagrams for σ, but did decrease the a content after annealing for long times. These results were correlated with the nitrogen content and microstructure of the weld metals. The effect of a on the fracture toughness of the weld metal was evaluated by the small punch (SP) test. A small amount of σ in the weld metal led to a marked decrease in the SP energy.

本文言語English
ページ(範囲)41-49
ページ数9
ジャーナルScience and Technology of Welding and Joining
4
1
DOI
出版ステータスPublished - 1999 1 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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