Ferrite to austenite reverse transformation process in B containing 9%Cr heat resistant steel HAZ

T. Shirane, S. Tsukamoto, K. Tsuzaki, Y. Adachi, T. Hanamura, M. Shimizu, F. Abe

研究成果: Contribution to journalArticle査読

33 被引用数 (Scopus)

抄録

Creep properties, HAZ microstructure Creep properties of the high Cr heat resistant steel welded joint can be improved by adding B due to prevention of the grain refinement in heat affected zone (HAZ). In the present study, phase transformation behaviour of the B steel HAZ has been investigated to understand suppression mechanism of the grain refinement. During reverse transformation, fine austenite was formed through diffusional transformation at the prior austenite grain boundary in the first stage, and then coarse austenite was formed at the same location of the original austenite. The volume fraction of the fine austenite increased with increasing perk temperature of the weld thermal cycle. This phenomenon can be explained if the coarse austenite contains high density of dislocations. Clear surface relief was observed during the reverse transformation by a confocal laser microscope. These results indicate that martensitic or displacive reverse transformation takes place during welding and it prevents the grain refinement in HAZ.

本文言語英語
ページ(範囲)698-707
ページ数10
ジャーナルScience and Technology of Welding and Joining
14
8
DOI
出版ステータス出版済み - 11 1 2009
外部発表はい

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics

フィンガープリント 「Ferrite to austenite reverse transformation process in B containing 9%Cr heat resistant steel HAZ」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル