1994 Fiscal Year Annual Research Report

金属間化合物の変形と破壊のメカニズム

Research Project

Project/Area Number	04239105
Research Institution	Kyoto University
Principal Investigator	山口正治京都大学, 工学部, 教授 (90029108)
Co-Investigator(Kenkyū-buntansha)	森博太郎大阪大学, 超高圧電顕センター, 助教授 (10024366) 馬越佑吉大阪大学, 工学部, 教授 (00029216) 菊池実東京工大, 工学部, 教授 (30089817) 及川洪東北大学, 工学部, 教授 (30005243) 竹内伸東京大学, 物性研究所・所長, 教授 (60013512)
Keywords	金属間化合物 / アルミナイド / シリサイド / 格子欠陥 / 変形 / すべり系 / 破壊
Research Abstract	本研究は,平成4年度に発足した重点領域研究「金属間化合物」の「変形とと破壊のメカニズム(A02)計画研究班」の第3年度の研究として実施した。新しい高温構造材料の開発を目標に、軽量のTi-Al系、高融点のTi-Si系、Mo-Si系、Nb-Si系、Nb-Al系金属間化合物に関する研究を進めたが、特に、Ti-Al系化合物、なかでもTi_3Al相と平衡するTiAl相について、注目すべき実験的成果が得られた。特に、単一のラメラ方位を持つTiAl/Ti_3Al 2相組織の結晶(PST結晶)が育成された結果、TiAl相、Ti_3Al相それぞれの力学特性が明らかになったことは注目に値する。しかも、Ti合金の重要な合金元素であるいくつかの遷移金属元素を含むTi-Al-X三元素状態図が明らかにされ、TiAl相、Ti_3Al相に関する結晶組成上の新知見と併せて、TiAl/Ti_3Al 2相組織を持つ新しい金属間化合物ベースの合金を開発するための基礎がほぼ固まった。このPST結晶を用いたTiAl/Ti_3Al 2相合金の研究を中心としてTiAlに関する本計画研究班の研究成果は国際的にも注目されており、TiAl基合金あるいはTiAl基合金に関わるプロセス(たとえば一方向性凝固プロセス)の開発への応用が検討されている。さらに,Nb,Mo等高融点金属のシリサイド、アルミナイドの脆性の本質と脆性→延性遷移に対する研究を押し進め、その結果、モリブデンシリサイドの変形機構、変形モードと変形挙動の異方性ならびにそれらと破壊挙動との関わりについて多くの新知見が得られた。

Research Products

(30 results)

All Other

All Publications (30 results)

[Publications] M. Yamahuchi: "Environmental Embrittlement of PST TiAl" Trans. Mater. Res. Soc. Japan. 13B. 61-73 (1994)
[Publications] H. Inui: "Deformation of Ti-36.5 at.% Al" Philosophical Magazine A 1994. 69. 1161-1177 (1994)
[Publications] M. Yamaguchi: "Mechanical Properties of TiAl" J. Mater. Sci. Technol.10. (1994)
[Publications] K. Ito: "Plastic Deformation of CoSi_2" Acta metall. mater.42. 1261-1271 (1994)
[Publications] J. Kawai: "Chemical Effects on Ti X-ray Fluorescene Spectra" Analyst. 119. 601-603 (1994)
[Publications] Y. Shirai: "Vancacies in Al_<67>Mn_8Ti_<25>" Intermetallics. 2. 221-224 (1994)
[Publications] M. Yamaguchi: "Twinning in Intermetallic Compounds" Twinning in Advanced materials,TMS,1994. 177-190 (1994)
[Publications] K. Suzuki: "HRTEM of Extended Defects in Wurtzite" Jpn.J.Appl.Phys.33. 1114-1120 (1994)
[Publications] S Takeuchi: "Plastic Deformation of Single Crystals of TiSi_2" Intermetallics. 2. 289-296 (1994)
[Publications] Y. Ishikawa: "Dynamic Recrystallization Regions in the Creep of Ti-53Al" Strength of Materials,ed. by H.Oikawa et al.733-736 (1994)
[Publications] Y. Yamabe: "Determination of Transition Temperatures in Ti-(40-45)at% Al" Scr. Metall. Mater.30. 553-557 (1994)
[Publications] N. Tada: "Inverse Analysis of Distribution of Internal Smaal Defects" JSME International Journal. Ser.A 37. 450-455 (1994)
[Publications] T. Kitamura: "Stochastic Simulation of Small Cracks in Creep-Fatigue" IUTAM Symposium on Probabilistic Structural Mechanics. 301-318 (1994)
[Publications] T. Nakano: "Effects of B Addition on the Plastic Behaviour of TiAl PST Crystals" Intermetallics. 2. 185-194 (1994)
[Publications] Y. Umakoshi: "The Fatigue Behaviour of TiAl PST Crystals" Porc.10th Inter.Conf. on Strength of Materials. 1. 345-348 (1994)
[Publications] Y. Umakoshi: "Effect of Lamellar Structure on Oxidation Behaviour of TiAl" Ceramics, Powders, Corrosion and Advanced Processing. 1. 229-232 (1994)
[Publications] Y. Umakoshi: "High Temperature Deformation of Ti_5Si_3 Single Crystals" Scripta metall mater.30. 1431-1436 (1994)
[Publications] Y. Umakoshi: "Plastic Behavior and Deformation Structure Silicide Single Crystals" Mat. Res. Soc. Sympo.322. 9-20 (1994)
[Publications] H.Y. Yasuda: "Cyclic Deformation Behaviour of TiAl Alloys" Phil. Mag. A. 71. 127-138 (1995)
[Publications] H. Mori: "Effect of MeV Electron Irradiation on Gold Atom Implantation into Silicon" J. Vacuum Science and Technology B. 12. 2376-2379 (1994)
[Publications] M. Komatsu: "Design of a Hot Tensile Stage for an Ultra-High Voltage Electron Microscope" J. American CEram. Soc.76. 839-842 (1994)
[Publications] H. Yasuda: "Structure of Nm-Sized InSb Clusters Formed by Spontaneous Alloying" Zeotscjroft fir Physik, D. 31. 209-212 (1994)
[Publications] H. Mori: "HREM Study on Crystallization of Gold-Implanted Amorphous SiC" Nucl. Instr. Methods in Phys. Res.,B. 94. 73-80 (1994)
[Publications] K. Masuda-Jindo: "Simulation Study on the Structure and Strength of GB" Trans. Mat. Res. Soc. Jpn.16B. 1345-1348 (1994)
[Publications] K. Masuda-Jindo: "Dislocation Nucleation Process at Crack Tip" Trans. Mat. Res. Soc. Jpn.16B. 397-400 (1994)
[Publications] T. Shinoda: "Design of Ni-Al Base High Temperature Alloys" Trans. Mat. Res. Soc. Jpn. 16B. 213-216 (1994)
[Publications] K. Masuda-Jindo: "Dislocations and Grain Boundaries in Semiconductors" Trans. Mat. Res. Soc. Jpn.16B. 349-354 (1994)
[Publications] K. Masuda-Jindo: "Interaction of Grain Boundaries,Dislocations and Impurity Atoms in Semiconductors" Solid State Phenomena. 37-38. 125-130 (1994)
[Publications] M.Yamaguchi: "Intermatallic Compounds" J.H.Westbrook and R.L.Fleischer ed.Wiley, 147-174 (1995)
[Publications] M.Yamaguchi: "Physical Metallurgy and Processing of Intermetallic Coumpounds" N.S.Stoloff and V.K.Sikka ed. Chapman & Hall (in press),

1994 Fiscal Year Annual Research Report

金属間化合物の変形と破壊のメカニズム

Principal Investigator

山口 正治 京都大学, 工学部, 教授 (90029108)

Research Products

[Publications] M. Yamahuchi: "Environmental Embrittlement of PST TiAl" Trans. Mater. Res. Soc. Japan. 13B. 61-73 (1994)

[Publications] H. Inui: "Deformation of Ti-36.5 at.% Al" Philosophical Magazine A 1994. 69. 1161-1177 (1994)

[Publications] M. Yamaguchi: "Mechanical Properties of TiAl" J. Mater. Sci. Technol.10. (1994)

[Publications] K. Ito: "Plastic Deformation of CoSi_2" Acta metall. mater.42. 1261-1271 (1994)

[Publications] J. Kawai: "Chemical Effects on Ti X-ray Fluorescene Spectra" Analyst. 119. 601-603 (1994)

[Publications] Y. Shirai: "Vancacies in Al_<67>Mn_8Ti_<25>" Intermetallics. 2. 221-224 (1994)

[Publications] M. Yamaguchi: "Twinning in Intermetallic Compounds" Twinning in Advanced materials,TMS,1994. 177-190 (1994)

[Publications] K. Suzuki: "HRTEM of Extended Defects in Wurtzite" Jpn.J.Appl.Phys.33. 1114-1120 (1994)

[Publications] S Takeuchi: "Plastic Deformation of Single Crystals of TiSi_2" Intermetallics. 2. 289-296 (1994)

[Publications] Y. Ishikawa: "Dynamic Recrystallization Regions in the Creep of Ti-53Al" Strength of Materials,ed. by H.Oikawa et al.733-736 (1994)

[Publications] Y. Yamabe: "Determination of Transition Temperatures in Ti-(40-45)at% Al" Scr. Metall. Mater.30. 553-557 (1994)

[Publications] N. Tada: "Inverse Analysis of Distribution of Internal Smaal Defects" JSME International Journal. Ser.A 37. 450-455 (1994)

[Publications] T. Kitamura: "Stochastic Simulation of Small Cracks in Creep-Fatigue" IUTAM Symposium on Probabilistic Structural Mechanics. 301-318 (1994)

[Publications] T. Nakano: "Effects of B Addition on the Plastic Behaviour of TiAl PST Crystals" Intermetallics. 2. 185-194 (1994)

[Publications] Y. Umakoshi: "The Fatigue Behaviour of TiAl PST Crystals" Porc.10th Inter.Conf. on Strength of Materials. 1. 345-348 (1994)

[Publications] Y. Umakoshi: "Effect of Lamellar Structure on Oxidation Behaviour of TiAl" Ceramics, Powders, Corrosion and Advanced Processing. 1. 229-232 (1994)

[Publications] Y. Umakoshi: "High Temperature Deformation of Ti_5Si_3 Single Crystals" Scripta metall mater.30. 1431-1436 (1994)

[Publications] Y. Umakoshi: "Plastic Behavior and Deformation Structure Silicide Single Crystals" Mat. Res. Soc. Sympo.322. 9-20 (1994)

[Publications] H.Y. Yasuda: "Cyclic Deformation Behaviour of TiAl Alloys" Phil. Mag. A. 71. 127-138 (1995)

[Publications] H. Mori: "Effect of MeV Electron Irradiation on Gold Atom Implantation into Silicon" J. Vacuum Science and Technology B. 12. 2376-2379 (1994)

[Publications] M. Komatsu: "Design of a Hot Tensile Stage for an Ultra-High Voltage Electron Microscope" J. American CEram. Soc.76. 839-842 (1994)

[Publications] H. Yasuda: "Structure of Nm-Sized InSb Clusters Formed by Spontaneous Alloying" Zeotscjroft fir Physik, D. 31. 209-212 (1994)

[Publications] H. Mori: "HREM Study on Crystallization of Gold-Implanted Amorphous SiC" Nucl. Instr. Methods in Phys. Res.,B. 94. 73-80 (1994)

[Publications] K. Masuda-Jindo: "Simulation Study on the Structure and Strength of GB" Trans. Mat. Res. Soc. Jpn.16B. 1345-1348 (1994)

[Publications] K. Masuda-Jindo: "Dislocation Nucleation Process at Crack Tip" Trans. Mat. Res. Soc. Jpn.16B. 397-400 (1994)

[Publications] T. Shinoda: "Design of Ni-Al Base High Temperature Alloys" Trans. Mat. Res. Soc. Jpn. 16B. 213-216 (1994)

[Publications] K. Masuda-Jindo: "Dislocations and Grain Boundaries in Semiconductors" Trans. Mat. Res. Soc. Jpn.16B. 349-354 (1994)

[Publications] K. Masuda-Jindo: "Interaction of Grain Boundaries,Dislocations and Impurity Atoms in Semiconductors" Solid State Phenomena. 37-38. 125-130 (1994)

[Publications] M.Yamaguchi: "Intermatallic Compounds" J.H.Westbrook and R.L.Fleischer ed.Wiley, 147-174 (1995)

[Publications] M.Yamaguchi: "Physical Metallurgy and Processing of Intermetallic Coumpounds" N.S.Stoloff and V.K.Sikka ed. Chapman & Hall (in press),

山口正治京都大学, 工学部, 教授 (90029108)