Grant-in-Aid for Scientific Research (A)
|Research Institution||TOHOKU UNIVERSITY|
ISHIDA Kiyohito Faculty of Engineering, TOHOKU UNIVERSITY Professor, 工学部, 教授 (20151368)
草加 勝司 大同特殊鋼(株), 研究開発本部, 主管研究員
渡辺 隆二 日立製作所(株), 日立研究所, 薄膜研究参事
山内 清 (株)トーキン, 材料研究所, 新素材研究部長
KAINUMA Ryousuke Faculty of Engineering, TOHOKU UNIVERSITY Associate Professor, 工学部, 助教授 (20202004)
OHTANI Hiroshi Center for Interdisciplinary Research, TOHOKU UNIVERSITY Associate Professor, 学際科学研究センター, 助教授 (70176923)
渡部 隆二 日立製作所(株), 日立研究所, 主任研究員
YAMAUCHU Kiyoshi The Tohkin Co., Laboratory for Materials Research, Chief Researcher
WATANABE Ryuzi The Hitachi Co., The Hitachi Research, Laboratory, Senior Research Scientist
KUSAKA Kathuzi The Daido Steel Co., the Division of R&D,Deputy General Manager
|Project Fiscal Year
1994 – 1996
Completed(Fiscal Year 1996)
|Budget Amount *help
¥17,400,000 (Direct Cost : ¥17,400,000)
Fiscal Year 1996 : ¥3,800,000 (Direct Cost : ¥3,800,000)
Fiscal Year 1995 : ¥5,100,000 (Direct Cost : ¥5,100,000)
Fiscal Year 1994 : ¥8,500,000 (Direct Cost : ¥8,500,000)
|Keywords||NICKEL ALUMINIDES / INTERMETALLIC COMPOUNDS / HIGH-TEMPERATURE MATERIALS / SHAPE MEMORY MATERIALS / THERMOMECHANICAL TREATMENTS / MICROSTRUCTURE CONTROL / B2 PHASE / DIFFUSION / ニッケルアルミナイド / 金属間化合物 / 耐熱耐酸化材料 / 形状記憶材料 / 加工熱処理 / 組織制御 / B2相 / 拡散 / 耐熱、耐酸化材料 / マルテンサイト|
The beta phase of nickel and cobalt aluminides with B2-type (C_sC1) structure have the potential to serve as a new type of materials with multi-functional properties such as high temperature strength, good oxidation resistance, shape memory, high damping capacity, stc. However the lack of ductility limits their application as the functional materials. The aim of this project is to develop a new type of beta base multi-functional materials improved ductility by microstructural control.
The phase equilibria of the Ni-rich portion in the Ni-Al-Mn, Ni-Al-Co and Ni-Al-Fe systems have been experimentally determined, and thermodynamic analysis on basis of the experimental data have been done.
2.High Temperature Materials
By means of microstructural control due to the information of the thermodynamic analysis, ductile gamma'(L1_2)+beta two-phase alloy which has both excellent oxidation resistance and high temperature strength has been developed by the conventional fabrication method combined with a thermomechanical heat treatment.
3.Shape Memory and Damping Materials
Martensitic transformation temperatures in the beta phase B2*L1_0 (Ms) of the Ni-Al-X (X : Ti, V,Cr, Mn, Fe, Co, Cu, etc.) systems were determined by DSC.It was clarified that adding Mn, Fe and Co are useful to increase the Ms temperature. By means of these data of Ms and phase equilibria, ductile gamma(Al)+beta two-phase shape memory alloys which operate at high temperatures between 100 and 600ﾟC have been developed in the Ni-Al-Fe-Mn quaternary system. These two-phase shape memory alloys show not only high damping capacity, but also higher yield strength than the other damping materials.