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

Tomohiko Hojo, Junya Kobayashi, Koh Ichi Sugimoto

研究成果: Conference contribution

4 被引用数 (Scopus)

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Materials Science and Technology Conference and Exhibition 2012, MS and T 2012
ページ1186-1193
ページ数8
出版ステータスPublished - 2012 12 1
外部発表はい
イベントMaterials Science and Technology Conference and Exhibition 2012, MS and T 2012 - Pittsburgh, PA, United States
継続期間: 2012 10 72012 10 11

出版物シリーズ

名前Materials Science and Technology Conference and Exhibition 2012, MS and T 2012
2

Other

OtherMaterials Science and Technology Conference and Exhibition 2012, MS and T 2012
CountryUnited States
CityPittsburgh, PA
Period12/10/712/10/11

ASJC Scopus subject areas

  • Materials Science (miscellaneous)

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