2015 Fiscal Year Final Research Report
Clarificaltion of formation mechanisms of formation mechanisms of LPSO structure based upon strain energy consideration
Project Area | Materials Science of synchronized LPSO structure -Innovative Development of Next-Generation Lightweight Structural Materials- |
Project/Area Number |
23109006
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Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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Allocation Type | Single-year Grants |
Review Section |
Science and Engineering
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Research Institution | Tohoku University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
KIGUCHI Takanori 東北大学, 金属材料研究所, 准教授 (70311660)
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Co-Investigator(Renkei-kenkyūsha) |
NISHITANI Shigeto 関西学院大学, 理工学部, 教授 (50192688)
KOYAMA Toshiyuki 名古屋大学, 工学研究科, 教授 (80225599)
HAYASHI Kouichi 名古屋工業大学, 工学研究科, 教授 (20283632)
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Project Period (FY) |
2011-04-01 – 2016-03-31
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Keywords | 相変態 / 電子顕微鏡 / ナノ解析 / 第一原理計算 / フェーズフィールド法 |
Outline of Final Research Achievements |
This study aims to clarify formation mechanisms of Synchronized Long-Period Stacking Ordered (LPSO) Structure which features synchronization of chemical and structural modulation and show superior mechanical properties including high strength owing to unique atomic arrangement of LPSO structure, focussing on mainly effects of elastic strain caused by strucural transition. In particular, process of stacking sequence change and relating local strain field as well as segregation of solute elements were examined by high resolution electron microscopy and three dimensional atom probe tomography. Furthermore, computational methods, i.e., both the first principle calculation and phase field simulation, were applied for theoretical analyses of energetics and kinetics in LPSO structure formation.
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Free Research Field |
金属組織学,加工熱処理,相変態,界面物性
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