Grain growth and pinning effect of microstructure dispersed by liquid particles

• Project/Area Number: 24246102
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Physical properties of metals
• Research Institution: Tohoku University
• Principal Investigator: ISHIDA Kiyohito 東北大学, 工学(系)研究科(研究院), 名誉教授 (20151368)
• Co-Investigator(Kenkyū-buntansha): KAINUMA Ryosuke 東北大学, 大学院工学研究科, 教授 (20202004) ; OHNUMA Ikuo 東北大学, 大学院工学研究科, 准教授 (20250714) ; OMORI Toshihiro 東北大学, 大学院工学研究科, 助教 (60451530)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥45,500,000 (Direct Cost: ¥35,000,000、Indirect Cost: ¥10,500,000); Fiscal Year 2014: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000); Fiscal Year 2013: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000); Fiscal Year 2012: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
• Keywords: 粒成長 / 液相ピン止め / Zener効果 / 2相鋼 / 低融点酸化物 / 偏晶合金 / ２相鋼

Outline of Final Research Achievements

Effect of liquid particles on grain growth in multi-phase structure was investigated. The following results were obtained.
(1) The grain growth of monotectic-type Fe-Bi, Zn-Bi and Al-Bi alloys was retarted by the dispersion of liquid particles with the formation of precipitation-free zones (PFZs) and large Bi particles located on the grain boundaries. (2) The grain growth characteristics of the liquid Bi particles dispersion structure of the two-phase (ferrite ((α) + liquid or austenite ((γ) +liquid) and the triple-phase (α+γ+liquid) in Fe-Mn-Al-Bi alloys show that when the matrix in the two- or triple-phase structures was the α phase, the fine Bi particles were dispersed within the α grain together with the formation of PFZs, while the matrix in the two- or triple-phase structures was the γ phase, most of the Bi particles were basically located on the grain boundaries.

Research Products

• [Journal Article] Grain Refinenment of Heat Affected Zone in High Heat Input Welding by Liquid Phase Pinning of Oxy-Sulfide (2015)
  • Author(s): T. Yamashita, J. Shimizu, K. Oki, M. Nagoshi, K. Oikawa and K. Ishida
  • Journal Title: ISIJ International Volume: -
  • Peer Reviewed
• [Journal Article] Grain growth of dual-phase structure dispersed by liquid particles in the Fe-Mn-Al-Bi alloys. (2014)
  • Author(s): T. Hagisawa, T. Saegusa, T. Omori, R. Kainuma and K. Ishida
  • Journal Title: Proceedings of 2nd HMnS, High Manganese Steel 2014 Volume: - Pages: 77-80
  • Peer Reviewed
• [Journal Article] Phase Diagrams and Alloy Design: Progress and Applications (2014)
  • Author(s): 大沼郁雄、石田清仁
  • Journal Title: Tetsu-to-Hagane Volume: 100 Issue: 9 Pages: 1050-1061
  • DOI: 10.2355/tetsutohagane.100.1050
  • NAID: 130004685490
  • ISSN: 0021-1575, 1883-2954
  • Peer Reviewed / Open Access
• [Journal Article] Grain Refinement of Heat Affected Zone in High Heat Input Welding by Liquid Phase Pinning of Oxy-Sulfide (2014)
  • Author(s): 山下孝子、嶋村純二、大井健次、名越正泰、及川勝成、石田清仁
  • Journal Title: Tetsu-to-Hagane Volume: 100 Issue: 3 Pages: 397-405
  • DOI: 10.2355/tetsutohagane.100.397
  • NAID: 130003395126
  • ISSN: 0021-1575, 1883-2954
  • Peer Reviewed / Open Access
• [Presentation] Grain growth of dual-phase structure dispersed by liquid particles in the Fe-Mn-Al-Bi alloys. (2014)
  • Author(s): K. Ishida
  • Organizer: 2nd International Conference on High Manganese Steel
  • Place of Presentation: RWTH Aachen University, Aachen, Germany
  • Year and Date: 2014-09-01
• [Presentation] 酸硫化物による溶接熱影響部組織微細化
  • Author(s): 山下孝子、嶋村純二、大井健次、名越正泰、及川勝成、石田清仁
  • Organizer: 日本鉄鋼協会２０１３年（第１６５回）春季講演大会
  • Place of Presentation: 東京