Novel anisotropic behavior of solid-liquid interfacial property and the related microstructure control

• Project/Area Number: 16H04541
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Metal making/Resorce production engineering
• Research Institution: Hokkaido University
• Principal Investigator: Ohno Munekazu 北海道大学, 工学研究院, 准教授 (30431331)
• Co-Investigator(Kenkyū-buntansha): 澁田 靖 東京大学, 大学院工学系研究科(工学部), 准教授 (90401124)
• Research Collaborator: Okuda Yohei ; Minami Hirono ; Kim Geunwoo
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000); Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2017: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000); Fiscal Year 2016: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
• Keywords: 凝固組織 / 界面物性 / デンドライト / フェーズフィールド法 / 分子動力学法 / 優先成長方位 / 金属生産工学

Outline of Final Research Achievements

In this study it was elucidated by means of solidification experiments that solidification in several alloy systems involves orientation transition phenomena where preferential growth direction of crystal depends on the alloy concentration. The thermodynamic analysis and atomistic simulations were carried out to understand the mechanism. The phase-field model for describing this phenomenon was developed and utilized for constructing orientation selection map by which one can understand a versatility of dendrite morphology associated with the transition phenomenon.

Academic Significance and Societal Importance of the Research Achievements

現在までの凝固工学では、結晶の優先方位は結晶構造のみで決まることが想定されてきた。本研究の学術的意義は、優先成長方位遷移現象が多くの合金系でも発現することを解明したことにより、界面物性の濃度依存性という今までの学理に考慮されてこなかった因子の重要性を示したことである。結晶の優先成長方位は、デンドライトの幾何学的特徴や競合成長における配列の対称性等を決定するため、凝固組織のサイズ・形態、そして偏析にまで影響を及ぼすことから、金属材料製造プロセスにおける凝固組織制御の高精度化につながる知見が得られた。

Research Products

• [Journal Article] Importance of microstructural evolution on prediction accuracy of microsegregation in Al-Cu and Fe-Mn alloys (2019)
  • Author(s): Munekazu Ohno, Masayoshi Yamashita, Kiyotaka Matsuura
  • Journal Title: International Journal of Heat and Mass Transfer Volume: 132 Pages: 1004-1017
  • DOI: 10.1016/j.ijheatmasstransfer.2018.12.055
  • Peer Reviewed
• [Journal Article] A parametric study of morphology selection in equiaxed dendritic solidification (2019)
  • Author(s): Geunwoo Kim, Tomohiro Takaki, Yasushi Shibuta, Shinji Sakane, Kiyotaka Matsuura, Munekazu Ohno
  • Journal Title: Computational Materials Science Volume: 162 Pages: 76-81
  • DOI: 10.1016/j.commatsci.2019.02.027
  • Peer Reviewed
• [Journal Article] Advent of cross-scale modeling: high-performance computing of solidification and grain growth (2018)
  • Author(s): Y. Shibuta, M. Ohno, T. Takaki
  • Journal Title: Advanced Theory and Simulations Volume: 1 Issue: 9 Pages: 1800065-1800065
  • DOI: 10.1002/adts.201800065
  • Peer Reviewed / Open Access
• [Journal Article] Variational formulation of a quantitative phase-field model for nonisothermal solidification in a multicomponent alloy (2017)
  • Author(s): M. Ohno, T. Takaki, Y. Shibuta
  • Journal Title: Physical Review E Volume: 96 Issue: 3 Pages: 033311-033311
  • DOI: 10.1103/physreve.96.033311
  • NAID: 120006360133
  • Peer Reviewed
• [Journal Article] Numerical testing of quantitative phase-field models with different polynomials for isothermal solidification in binary alloys (2017)
  • Author(s): M. Ohno, T. Takaki, Y. Shibuta
  • Journal Title: Journal of Computational Physics Volume: 335 Pages: 621-636
  • DOI: 10.1016/j.jcp.2017.01.053
  • NAID: 120006606586
  • Peer Reviewed
• [Presentation] 優先成長方位の遷移に伴う一向凝固組織の形態変化のフェーズフィールド・シミュレーション (2019)
  • Author(s): 金根佑, 高木知弘、坂根慎治、澁田靖、松浦清隆、大野宗一
  • Organizer: 日本金属学会 2019年春期（第164回）講演大会
• [Presentation] Quantitative phase-field modelling and simulations of alloy solidification with two-sided asymmetric diffusion (2018)
  • Author(s): M. Ohno, T. Takaki and Y. Shibuta
  • Organizer: 55th Annual Technical Meeting of the Society of Engineering Science (SES 2018)
  • Int'l Joint Research / Invited
• [Presentation] Phase-field simulation for morphological change of solidification structure with transition in preferred growth orientation (2018)
  • Author(s): G. Kim, M. Ohno, T. Takaki, Y. Shibuta and K. Matsuura
  • Organizer: 55th Annual Technical Meeting of the Society of Engineering Science (SES 2018)
  • Int'l Joint Research
• [Presentation] Quantitative phase-field simulations for solidification microstructure with different preferred growth direction (2018)
  • Author(s): G. Kim, T. Takaki, K. Matsuura and M. Ohno
  • Organizer: The 13th World Congressin Computational Mechanics (WCCM 2018)
  • Int'l Joint Research
• [Presentation] Variational Forumulation of a Quantitative Phase-field Model for Non-isothermal Solidification in Multi-component Alloys and its Applications (2018)
  • Author(s): M. Ohno, T. Takaki, Y. Shibuta
  • Organizer: TMS 147th Annual Meeting & Exhibition, TMS2018
• [Presentation] 優先成長方位遷移現象に伴う等軸デンドライト形態変化のシミュレーション (2017)
  • Author(s): 金根佑、大野宗一、松浦清隆
  • Organizer: 日本金属学会 2017年秋期講演大会
• [Presentation] 分子動力学法を用いたfccモデル合金における固液界面エネルギーの算出 (2017)
  • Author(s): 南洋乃、大野宗一、松浦清隆
  • Organizer: 日本鉄鋼協会 第174回秋季講演大会
• [Presentation] 分子動力学法を用いたfcc金属の固液界面エネルギー異方性の算出 (2017)
  • Author(s): 南洋乃、大野宗一、松浦清隆
  • Organizer: 日本鉄鋼協会・日本金属学会・両支部合同サマーセッション
• [Presentation] 結晶の優先成長方位とデンドライト成長形態との関係 (2017)
  • Author(s): 金根佑、大野宗一、松浦清隆
  • Organizer: 日本鉄鋼協会・日本金属学会・両支部合同サマーセッション
• [Presentation] 定量的フェーズフィールド・モデリングの進展と高温物性値の推定 (2017)
  • Author(s): 大野宗一、澁田靖、高木知弘
  • Organizer: ポスト「京」重点課題(7)サブ課題E「高信頼性構造材料」 H29年度第一回研究会
• [Presentation] 「Quantitative phase-field modelling for alloy solidification and its applications (2017)
  • Author(s): M. Ohno, T. Takaki and Y. Shibuta
  • Organizer: The 10th Pacific Rim International Conference on Modeling of Casting and Solidification Processes (MCSP 2017)
  • Int'l Joint Research / Invited
• [Presentation] Phase-field simulation of morphology of equiaxed dendrite for different preferred growth directions (2017)
  • Author(s): G. Kim, M. Ohno and K. Matsuura
  • Organizer: The 10th Pacific Rim International Conference on Modeling of Casting and Solidification Processes (MCSP 2017)
  • Int'l Joint Research
• [Presentation] Quantitative phase-field modeling and simulations of competitive growth of dendrites in alloy systems (2016)
  • Author(s): M. Ohno, T. Takaki and Y. Shibuta
  • Organizer: 17th International Conference in Asia, IUMRS-ICA 2016
  • Place of Presentation: Qingdao International Convention Center, Qingdao, China
  • Year and Date: 2016-10-20
  • Int'l Joint Research / Invited
• [Presentation] 溶質添加によるFCC固溶体の固液界面エネルギー異方性の変化 (2016)
  • Author(s): 奥田洋平、大野宗一、松浦清隆
  • Organizer: 日本金属学会 2016年秋期講演大会
  • Place of Presentation: 大阪大学, 豊中市
  • Year and Date: 2016-09-23
• [Presentation] Quantitative Phase-Field Simulations of Solidification Microstructures in Alloy Systems (2016)
  • Author(s): M. Ohno, T. Takaki, Y. Shibuta
  • Organizer: The 9th Pacific Rim International Congress on advanced Materials and processing (PRICM 9)
  • Place of Presentation: Kyoto International Conference Center, Kyoto, Japan
  • Year and Date: 2016-08-03
  • Int'l Joint Research / Invited