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.
|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|
|出版ステータス||Published - 2012 11月 19|
|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 7 → 2012 10月 11
|Other||2012 AIST Steel Properties and Applications Conference, Held in Conjunction with the Materials Science and Technology 2012 Conference and Exhibition, MS and T 2012|
|Period||12/10/7 → 12/10/11|
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