Effects of aluminum on delayed fracture properties of ultra high-strength low alloy TRIP-aided steels

Tomohiko Hojo, Koh Ichi Sugimoto, Youichi Mukai, Shushi Ikeda

研究成果: Article査読

8 被引用数 (Scopus)

抄録

To improve the delayed fracture strength of ultra high-strength low alloy TRIP-aided steels with bainitic ferrite matrix (TBF steels), the effects of aluminum content on hydrogen absorption behavior and delayed fracture properties of 0.2%C-0.5∼ 1.5%Si-1.5%Mn TBF steel were investigated. When aluminum was added to the TBF steel, the diffusible hydrogen increased. It was expected that the hydrogen was charged not only in retained austenite films but also on lath boundary. Delayed fracture strength of aluminum bearing TBF steels was significantly increased, compared with conventional TBF steel. This was mainly caused by (1) suppression of the stress-assisted martensite transformation resulting from the stabilized or carbon-enriched retained austenite, (2) hydrogen trapping to refined interlath retained austenite films and lath boundary, and (3) relaxation of localized stress concentration by TRIP effect of the retained austenite.

本文言語English
ページ(範囲)234-239
ページ数6
ジャーナルTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
93
3
DOI
出版ステータスPublished - 2007 3
外部発表はい

ASJC Scopus subject areas

  • 凝縮系物理学
  • 物理化学および理論化学
  • 金属および合金
  • 材料化学

フィンガープリント

「Effects of aluminum on delayed fracture properties of ultra high-strength low alloy TRIP-aided steels」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