• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

1994 Fiscal Year Final Research Report Summary

JOINT STUDY ON THE DEVELOPMENT OF Ni-Al-Ti BASE AUPERALLOYS

Research Project

Project/Area Number 04044023
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

ISHIDA Kiyohito  FACULTY OF ENGINEERING,TOHOKU NIVERSITY, 工学部, 教授 (20151368)

Co-Investigator(Kenkyū-buntansha) AGREN J.  DIV.PHYS METALL., ROYAL INSTITUTE OF TECHNOLOGY, 金属系, 教授
INDEN G.  MAX-PLANCK-INSTITUTE FOR STEEL RESEARCH, 鉄鋼研究所, 教授
SAUNDERS N.j.  THERMOTECH LTD, (連合王国), 代表
MIODOWNIK A.p.  DEPT.OF MAT.SCI.& ENG., UNIVERSITY OF SURREY, 材料系, 教授
OHNUMA I.  FACULTY OF ENGINEERING,TOHOKU NIVERSITY, 工学部, 助手 (20250714)
貝沼 亮介  東北大学, 工学部, 助手 (20202004)
大谷 博司  東北大学, 工学部, 助手 (70176923)
OHTANI H.  FACULTY OF ENGINEERING,TOHOKU NIVERSITY
KAINUMA R.  FACULTY OF ENGINEERING,TOHOKU NIVERSITY
Project Period (FY) 1992 – 1994
KeywordsNi-base superalloy / Intermetallic compounds / Phase equilibria / Heusler phase / Ordered phase / Phase diagram / Heat-resistant alloy / Microstructural control
Research Abstract

To develop a new type of beta (NiAl : B2) -base superalloy, phase equilibria in the Ni-Al base systems have been investigated and some microstructural controls based on the information of the phase equilibria have been performed. The results obtained are summarized as follows.
1, Phase Equilibria in the Ni-Al Base Systems
The phase equilibria among the beta, gamma (A1), gamma' (L1_2), beta' (L2_1) and eta (D0_<24>) phases in the Ni-Al-Ti, Ni-Al-Fe, Ni-Al-Co and Ni-Al-Ti-base systems were determined mainly by diffusion couple experiment. Thermodynamic analysis and computer calculation of phase diagrams of the Ni-Al, Ni-Ti, Ni-Al-Ti, and Ni-Al-Fe systems were also carried out.
2, Microstructural Control
gamma+beta, gamma'+beta and gamma+gamma'+beta multi-phase alloys were obtained by a conventional thermomechanical treatment through the microstructural control. In the Ni-Al-Fe and Ni-Al-Co systems where martensitic transformation occurs in the beta phase, three types of beta+gamma' structure … More s i.e.blocky, fine lamellar and widmanstatten structures, can be obtained.
3, Mechanical Properties of Multi-Phase Alloys
(1) gamma+beta two-phase alloys ; the introduction of gamma phase improves the ductility drastically and exhibits a good tensile properties at room temperature. This type of alloys shows an excellent oxidation resistance, while high-temperature strength decreases with increasing temperature over 600゚C.
(2) gamma+beta two-phase alloys ; the alloys with the lamellar structure show an excellent mechanical properties at room temperature. The high-temperature strength is slightly higher than that of the gamma+beta two-phase alloy.
(3) gamma'+beta+beta' three-phase alloys ; Ni- (15-25) Al- (7-15) Ti base three-phase alloys exhibit an excellent strength higher than that of some practical superalloys at the temperatures below 700゚C,while the increase in ductility is necessary for the practical use.
It is concluded from the present study that the Ni-Al base superalloys with the beta matrix have sufficient oxidation resistance and exhibit strength higher than many practical superalloys at the temperatures below 700゚C. Less

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] H.Ohtani: "Thermodynamic Databases for Alloy Phase Diagrams" Trans.Met.Res.Soc.Jpn.9. 199-204 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] R.Kainuma: "Hot-workability and Mechanical Properties of β+γ Co-Ni-Al-Cr Base Alloys" Proc.3rd Japan International SAMPE Symp.1410-1415 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.C.Jia: "Partition of Alloying Elements between γ(A1),γ(L12) and β(B2) Phases in Ni-Al Base Systems" Metall.Mater.Trans.25A. 473-484 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] C.C.Jia: "Partition of Alloying Elements between γ(A1) and η(DO24) Phases in the Ni-Ti Base Systems" Experimental Methods of Phase Diagram Determination,TMS. 31-38 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ishida: "Development of Ductile NiAl(B2)-Base Alloys by Microstructural Control" Proc.Symp.on Mechanical Properties and Phase Transformations of Multi-Phase Intermetallic Alloys,TMS,発表予定. (1995)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 石田清仁: "材料における機能の発現と状態図" 材料開発・設計における状態図の基礎と応用、日本金属学会. 72-82 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Ohtani: "Thermodynamic Databases for Alloy Phase Diagrams" Trans.Met.Res.Soc.Jpn.9. 199-204 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R.Kainuma: "Hot-workability and Mechanical Properties of beta+gamma Co-Ni-Al-Cr Base Alloys" Proc.3rd Japan International SAMPE Symp.1410-1415 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.C.Jia: "Partition of Alloying Elements between gamma (A1), gamma' (L1_2)and beta (B2) Phases in Ni-Al Base Systems" Metall.Mater.Trans. 25A. 473-484 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] C.C.Jia: "Partition of Alloying Elements between gamma (A1)and eta (DO_<24>) Phases in the Ni-Ti Base Systems" Experimental Methods of Phase Diagram Determination, TMS. 31-38 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Ishida: "Development of Ductile NiAl (B2) -Base Alloys by Microstructural Control" Proc.Symp.on Mechanical Properties and Phase Transformations of Multi-Phase Intermetallic Alloys. (Happyo yotei). (1995)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Ishida: "Phase Diagrams in the Functional Materials" Fundamental Aspects and Applications of Phase Diagram in the Development and Design of Materials, The JIM Seminar. 71-82 (1994)

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 1996-04-15  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi