Hydrogen embrittlement resistances of alloying elements adding ultrahigh-strength low-alloy TRIP-aided steels

Tomohiko Hojo, Junya Kobayashi, Koh Ichi Sugimoto

研究成果: Conference contribution

抄録

To develop ultra high strength steels for automotive impact safety parts, effects of alloying elements on hydrogen embrittlement resistance of ultra high strength low alloy TRIP-aided steels with martensitic matrix (TM steel) were investigated. Hydrogen embrittlement susceptibilities of TRIP-aided steels were decreased by addition of alloying elements although tensile strength and diffusible hydrogen concentration of alloying elements adding TM steels were increased compared with base steel. Particularly, when 1.0 mass% chromium was added to the TM steels, TM steel indicated low hydrogen embrittlement susceptibility. It is considered that uniform and refined lath matrix and retained austenite/matrix interface absorbed a large amount of diffusible hydrogen in order to suppress hydrogen trapping to the grain boundaries and the lath boundaries and strain induced transformation of stable retained austenite suppressed initiation and growth of voids and initiation and propagation of cracks effectively.

本文言語English
ホスト出版物のタイトルAIST Steel Properties and Applications Conference Proceedings - Combined with MS and T'12, Materials Science and Technology 2012
ページ393-401
ページ数9
出版ステータスPublished - 2012 11月 19
外部発表はい
イベント2012 AIST Steel Properties and Applications Conference, Held in Conjunction with the Materials Science and Technology 2012 Conference and Exhibition, MS and T 2012 - Pittsburgh, PA, United States
継続期間: 2012 10月 72012 10月 11

Other

Other2012 AIST Steel Properties and Applications Conference, Held in Conjunction with the Materials Science and Technology 2012 Conference and Exhibition, MS and T 2012
国/地域United States
CityPittsburgh, PA
Period12/10/712/10/11

ASJC Scopus subject areas

  • 金属および合金

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