Mechanical characterization of local deformation behavior in the vicinity of grain boundary

• Project/Area Number: 20560663
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: National Institute for Materials Science
• Principal Investigator: OHMURA Takahito National Institute for Materials Science, 新構造材料センター, 主幹研究員 (40343884)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2009: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 鉄鋼材料 / 結晶粒界 / 転位 / 力学挙動 / ナノインデンテーション / 透過電子顕微鏡 / その場観察 / 粒界 / 格子欠陥 / 塑性変形 / 局所変形挙動 / 相変態 / 異相界面

Research Abstract

Nano-scale mechanical characterization was applied to grain boundary of steels and fundamental deformation behavior was analyzed to consider the mechanism of grain boundary strengthening. The critical stress for the plasticity initiation is lower for the grain boundary than that for the grain interior. Through the in-situ nanoindentation in a TEM, it was found that the flow stress dropped with drastic dislocation multiplication. There was no remarkable dislocation pile-up at the grain boundary even though the grain boundary has a large angle.

Research Products

• [Journal Article] Direct observation of plastic deformation in iron-3% silicon single crystal by in-situ nanoindentation in transmission electron microscopy (2011)
  • Author(s): L.Zhang, T.Ohmura, K.Sekido, K.Nakajima, T.Hara, K.Tsuzaki
  • Journal Title: Scripta Mater. 64 Pages: 919-922
  • Peer Reviewed
• [Journal Article] Direct observation of plastic deformation in iron-3% silicon single crystal by in situ nanoindentation in transmission electron microscopy (2011)
  • Author(s): L.Zhang, T.Ohmura, K.Sekido, K.Nakajima, T.Hara, K.Tsuzaki
  • Journal Title: Scripta Mater. Volume: 64 Pages: 919-922
  • Peer Reviewed
• [Journal Article] Characterization of local deformation behaviors of Fe-Ni lenticular martensite by nanoindentation (2010)
  • Author(s): L.Zhang, T.Ohmura, A.Shibata, K.Tsuzaki
  • Journal Title: Mater.Sci.Eng.A 527 Pages: 1869-1874
  • Peer Reviewed
• [Journal Article] Effects of lattice defects on indentation-induced plasticity initiation behavior in metals
  • Author(s): T.Ohmura, L.Zhang, K.Sekido, K.Tsuzakia
  • Journal Title: (submitted)
• [Presentation] ナノインデンテーションを用いた塑性変形の開始挙動の解析 (2010)
  • Author(s): 大村孝仁
  • Organizer: 日本材料学会関東支部セミナー
  • Place of Presentation: 東京
  • Year and Date: 2010-12-06
• [Presentation] ナノインデンテーションを用いた塑性変形の開始挙動の解析 (2010)
  • Author(s): 大村孝仁
  • Organizer: 日本材料学会関東支部セミナー
  • Place of Presentation: 東京理科大学(東京都)
  • Year and Date: 2010-12-06
• [Presentation] 鋼の塑性変形開始挙動に対する初期転位密度と固溶Cの影響 (2010)
  • Author(s): 関戸薫子,大村孝仁,原徹,ZHANG Ling,津崎兼彰
  • Organizer: 日本鉄鋼協会第160回秋季講演大会
  • Place of Presentation: 札幌
  • Year and Date: 2010-09-26
• [Presentation] TEM内その場ナノインデンテーション法による変形の観察 (2010)
  • Author(s): ZHANG Ling,大村孝仁,関戸薫子,中島清美,原徹,津崎兼彰
  • Organizer: 日本鉄鋼協会第160回秋季講演大会
  • Place of Presentation: 札幌
  • Year and Date: 2010-09-26
• [Presentation] 鋼の塑性変形開始挙動に対する初期転位密度と固溶Cの影響 (2010)
  • Author(s): 関戸薫子, 大村孝仁, 原徹, ZHANG Ling, 津崎兼彰
  • Organizer: 日本鉄鋼協会第160回秋季講演大会
  • Place of Presentation: 北海道大学(北海道)
  • Year and Date: 2010-09-25
• [Presentation] TEM内その場ナノインデンテーション法による変形の観察 (2010)
  • Author(s): ZHANG Ling, 大村孝仁, 関戸薫子, 中島清美, 原徹, 津崎兼彰
  • Organizer: 日本鉄鋼協会第160回秋季講演大会
  • Place of Presentation: 北海道大学(北海道)
  • Year and Date: 2010-09-25
• [Presentation] Characterization of local deformation behavior of metals through nanoindentation technique (2010)
  • Author(s): T.Ohmura, L.Zhang, K.Sekido, K.Tsuzaki
  • Organizer: Fourth International Conference on the Science and Technology for Advanced Ceramics
  • Place of Presentation: Yokohama
  • Year and Date: 2010-06-22
• [Presentation] Characterization of local deformation behavior of metals through nanoindentation technique (2010)
  • Author(s): T.Ohmura, Ling Zhang, Kaoru Sekido, Kaneaki Tsuzaki
  • Organizer: Fourth International Conference on the Science and Technology for Advanced Ceramics
  • Place of Presentation: メルパルク横浜(神奈川県)
  • Year and Date: 2010-06-21
• [Presentation] Fe-Niレンズマルテンサイトにおける局部変形挙動/Local deformation behavior of Fe-Ni lenticular martensite (2009)
  • Author(s): L.Zhang,大村孝仁,津崎兼彰
  • Organizer: 日本金属学会2009年秋期大会
  • Place of Presentation: 京都
  • Year and Date: 2009-09-24
• [Presentation] Fe-Niレンズマルテンサイトにおける局部変形挙動/Local deformation behavior of Fe-Ni lenticular martensite (2009)
  • Author(s): L.Zhang, 大村孝仁, 津崎兼彰
  • Organizer: 日本金属学会2009年秋期大会
  • Place of Presentation: 京都大学、京都市
  • Year and Date: 2009-09-15
• [Presentation] INDENTATION-INDUCED LOCAL DEFORMATION BEHAVIOR OF ULTRA-FINE GRAINED ALMINUM PRODUCED BY SEVERE PLASTIC DEFORMATION (2009)
  • Author(s): T.Ohmura, L.Zhang, K.Tsuzaki
  • Organizer: THERMEC 2009
  • Place of Presentation: Berlin
  • Year and Date: 2009-08-26
• [Presentation] INDENTATION-INDUCED LOCAL DEFORMATION BEHAVIOR OF ULTRA-FINE GRAINED ALMINUM PRODUCED BY SEVERE PLASTIC DEFORMATION (2009)
  • Author(s): T.Ohmura, L.Tsuzaki, K.Tsuzaki
  • Organizer: THERMEC 2009
  • Place of Presentation: MARITIM Hotel, Berlin
  • Year and Date: 2009-08-24
• [Presentation] Indentation-induced plasticity initiation at a stress level of an ideal strength (2009)
  • Author(s): T.Ohmura, L.Zhang, K.Tsuzaki
  • Organizer: International Workshop on Probing the Limits of Strength
  • Place of Presentation: Berkeley USA
  • Year and Date: 2009-08-11
• [Presentation] Indentation-induced plasticity initiation at a stress level of an ideal strength (2009)
  • Author(s): T.Ohmura, L.Zhang, K.Tsuzaki
  • Organizer: International Workshop on Probing the Limits of Strength
  • Place of Presentation: Lawrence Berkeley Lab., Berkeley CA, USA
  • Year and Date: 2009-08-10
• [Presentation] TEMナノインデンテーション法による転位と粒界相互作用のその場観察/TEMナノインデンテーション法による転位と粒界相互作用のその場観察 (2009)
  • Author(s): 大村孝仁
  • Organizer: 日本材料学会第58期第1回分子動力学部門委員会講演会
  • Place of Presentation: 金沢
  • Year and Date: 2009-07-03
• [Presentation] TEMナノインデンテーション法による転位と粒界相互作用のその場観察/TEMナノインデンテーション法による転位と粒界相互作用のその場観察 (2009)
  • Author(s): 大村孝仁
  • Organizer: 日本材料学会第58期第1回分子動力学部門委員会講演会
  • Place of Presentation: 金沢大学、金沢市
  • Year and Date: 2009-07-03
• [Presentation] ナノインデンテーションの原理と微細組織材料への応用/ナノインデンテーションの原理と微細組織材料への応用 (2009)
  • Author(s): 大村孝仁
  • Organizer: 第5回プローブ顕微鏡による表面分析研究会
  • Place of Presentation: 名古屋
  • Year and Date: 2009-06-26
• [Presentation] ナノインデンテーションの原理と微細組織材料への応用/ナノインデンテーションの原理と微細組織材料への応用 (2009)
  • Author(s): 大村孝仁
  • Organizer: 第5回プローブ顕微鏡による表面分析研究会
  • Place of Presentation: 名古屋銀行協会、名古屋市
  • Year and Date: 2009-06-26
• [Presentation] Evaluation of strengthening factors for bulk metals through nanoindentaiton technique (2009)
  • Author(s): T.Ohmura, L.Zhang, K.Tsuzaki
  • Organizer: Evaluation of strengthening factors for bulk metals through nanoindentaiton technique,ISOPE-2009
  • Place of Presentation: Osaka
  • Year and Date: 2009-06-23
• [Presentation] Evaluation of strengthening factors for bulk metals through nanoindentaiton technique (2009)
  • Author(s): T. Ohmura. L. Zhang, K. Tsuzaki
  • Organizer: ISOPE 2009
  • Place of Presentation: 大阪国際コンベンションセンター,大阪市(発表確定)
  • Year and Date: 2009-06-22
• [Presentation] Evaluation of strengthening factors for bulk metals through nanoindentaiton technique / Evaluation of strengthening factors for bulk metals through nanoindentaiton technique (2009)
  • Author(s): T.Ohmura, L.Tsuzaki, K.Tsuzaki
  • Organizer: ISOPE-2009
  • Place of Presentation: 大阪国際コンベンションセンター、大阪市
  • Year and Date: 2009-06-21