Summary of Research Project Results Under the JSPS FY2000
"Research for the future Program"



1.Research Institution@Kyoto University
@
2.University-Industry Cooperative Research Committee@123rd Committee on Heat-Resisting Metals and Alloys
@
3.Term of Project@FY1996`FY2000
@
4.Project Number@96R12301
@
5.Title of Project@High-Temperature Materials - Development of Practical High Temperature Intermetallics

6.Projetct Leader
Name Institution,Department Title of Position
Masaharu Yamaguchi Kyoto University, Materials Science and Engineering Professor

7.Core Members

Names Institution,Department Title of Position
Takashi Matsuo Tokyo Institute of Technology, Metallurgical Engineering Professor

8.Cooperating Researchers

Names Institution,Department Title of Position
Koichii Maruyama Tohoku University, Physics and Chemistry of Materials Professor
Masao Takeyama Tokyo Institute of Technology, Metallurgical Engineering Associate Professor
Haruyuki Inui Kyoto University, Materials Science and Engineering Associate Professor

9.Summary of Research Results

The transformation processes and developed microstructures in the Ti-Al binary system in the composition range between 35 and 50 at.% Al were systematically investigated. In TiAl-base alloys, the ƒΏ, ƒΐ and ƒΑ three phases are involved in microstructure formation, and thus a variety of microstructures can be obtained. The results of the experiments provided us with a systematic knowledge on the relationship between each of the possible solidification pathways and the corresponding microstructures.
Mechanical properties of the lamellar microstructure of TiAl-base alloys are extremely anisotropic with respect to the lamellar orientation. However, if the lamellar microstructure can be aligned parallel to the growth direction, the resulting material should possess a good combination of mechanical properties. The seeding and directional solidification (DS) techniques were developed for the lamellar boundaries to be aligned parallel to the growth direction. The lamellar structure of a wide variety of TiAl-base alloys can be controlled using the techniques. DS ingots of these alloys exhibit an excellent combination of room temperature tensile properties and high temperature strength, in particular, creep strength. Not only secondary creep rate but also primary creep strain are reduced by aligning the lamellar boundaries along the loading axis. The addition of a small amount of Si and transition metals such as Mo, W and Re even dramatically increases creep resistance of DS ingots of TiAl-base alloys.
Tensile and creep properties of MoSi2 and related silicides were systematically investigated. Also various properties of a Mo5Si3-base borosilicide were investigated. [001]-oriented MoSi2 and the borosilicide exhibit much better high-temperature creep resistance than advanced ceramics-base materials.

10.Key Words

(1)TiAlA(2)TiAl-base alloysA(3)lamellar structure
(4)directional solidificationA(5)mechanical propertiesA(6)creep
(7)MoSi2A(8)transition metal silicides

11.References

[Reference Articles]
Author Title of Article
M. Yamaguchi et al. Directonal Solidification of TiAl-Base Alloys
Journal Volume Year Pages Concerned
Intermetallics 8(5-6) 2000 511-517

Author Title of Article
M. Yamaguchi et al. Recent Research and Development of TiAl-based Alloys
Journal Volume Year Pages Concerned
Proceedings of Materials Week 2000 (EuroMat 2000) @ @ in press

Author Title of Article
M. Yamaguchi et al. Directional Solidification of TiAl-based Alloys and Properties of Directionally Solidified Ingots
Journal Volume Year Pages Concerned
Adv. Eng. Mater. @ @ in press

Author Title of Article
M. Yamaguchi et al. Compatibility Stresses in bicrystals of polysynthetically twinned TiAl
Journal Volume Year Pages Concerned
Proc. ICSMA-12 @ @ in press

Author Title of Article
M. Yamaguchi et al. Plastic Deformation of Bicrystals Composed of Polysynthetically Twinned TiAl Crystals
Journal Volume Year Pages Concerned
Acta Mater @ @ in press

Author Title of Article
M. Yamaguchi et al. Directional solidification of TiAl-Re-Si alloys with aligned ƒΑ/ƒΏ2 lamellar microstructures
Journal Volume Year Pages Concerned
Intermetallics 7 1999 779-784

Author Title of Article
M. Yamaguchi et al. Deformation of PST Crystals of a TiAl/Ti3Al two-Phase Alloy at 1000Ž
Journal Volume Year Pages Concerned
Intermetallics 7,10 1999 1131-1139

Author Title of Article
M. Yamaguchi et al. C-Axis tensile deformation of Ti3Al with the D019 structure at room temperature
Journal Volume Year Pages Concerned
Acta Mater 47(12) 1999 3405-3410

Author Title of Article
M. Yamaguchi et al. Deformation of a 45‹<321> oriented polysynthetically twinned (PST) TiAl crystal at high strain rates and high temperatures
Journal Volume Year Pages Concerned
Phil. Mag. A 80(1) 2000 49-68

Author Title of Article
M. Yamaguchi et al. Directional solidification of TiAl-Si alloys using a polycrystalline seed
Journal Volume Year Pages Concerned
Intermetallics 8(4) 2000 399-405

Author Title of Article
M. Yamaguchi et al. Microstructural Control through Seeding and Directional Solidification of TiAl alloys containing Mo and C
Journal Volume Year Pages Concerned
Acta Mater. 48 2000 3221-3233

Author Title of Article
M. Yamaguchi et al. Nitrogen -doped TiAl Alloys
Journal Volume Year Pages Concerned
J. Materials Science 35 2000 4527-4532

Author Title of Article
M. Yamaguchi et al. Editorial Overview - Metals and alloy
Journal Volume Year Pages Concerned
Current Opinion in Solid State and Materials Science 4 1999 237-238

Author Title of Article
M. Yamaguchi et al. Creep Deformation of TiAl-Si Alloys with Aligned ƒΑ/ƒΏ2 Lamellar Microstructures
Journal Volume Year Pages Concerned
Metall. Mater. Trans. 31A 2000 2463-2473

Author Title of Article
M. Yamaguchi et al. High-Temperature Structural Intermetallics
Journal Volume Year Pages Concerned
Acta Mater. 48(1) 2000 307-322

Author Title of Article
M. Yamaguchi et al. Creep Deformation of Directional Solidified TiAl-Mo-C Alloys
Journal Volume Year Pages Concerned
Acta Mater. @ @ in press

Author Title of Article
M, Yamaguchi Recrystallization on High-Temperature Aluminides
Journal Volume Year Pages Concerned
4th Int. Conf. On Recrystallization and Related Phenomena, JIM, @ 1999 59-68

Author Title of Article
M. Yamaguchi et al. Directional Solidification and Creep Deformation of TiAl-Si Alloys
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999 TMS, 1999 @ 1999 295-300

Author Title of Article
M. Yamaguchi et al. Creep of TiAl-Si Alloys with Aligned Lamellar Microstructures
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999, TMS 1999 @ 1999 627-631

Author Title of Article
M. Yamaguchi et al. Effect of the Lamellar Orientation on the Creep Resistance in Polysynthetically Twinned (PST) Ti-48mol%Al
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999, TMS 1999 @ 1999 717-724

Author Title of Article
M. Yamaguchi et al. Deformation of Bi-PST Crystals of TiAl Produced by Diffusion Bonding
Journal Volume Year Pages Concerned
High-Temperature Ordered Intermetallic Alloys VIII, MRS Symp. Proc. Vol.552 1999 KK3.9.1-3.9.6

Author Title of Article
M. Yamaguchi et al. Microstructure Control and Lamellar Stability in a Cast TiAl as a Function of Mo and C
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999, TMS 1999 @ 1999 309-314

Author Title of Article
M. Yamaguchi et al. Atom Probe Field Ion Microscopy of ZR-Doped Polysynthetically Twinned Titanium Aluminide
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999, TMS 1999 @ 1999 133-139

Author Title of Article
M. Yamaguchi et al. Role of Interfaces on the Activation of Slip Systems in the PST TiAl Alloy
Journal Volume Year Pages Concerned
High-Temperature Ordered Intermetallic Alloys VIII, MRS Symp. Proc. Vol.552 1999 KK3.3.1-3.3.6

Author Title of Article
M. Yamaguchi et al. Temperature Dependence of Yield Stress, Deformation Mode and Deformation Structure in TiAl Single Crystals (Ti-56 at. %Al)
Journal Volume Year Pages Concerned
Phil. Mag. A 75,No.2 1996 395-423

Author Title of Article
M. Yamaguchi et al. Alignment of the TiAl/Ti3Al lamellar microstructure in TiAl alloys by growth from a seed materials,
Journal Volume Year Pages Concerned
Acta Mater. 45(6) 1997 2523-2533

Author Title of Article
M. Yamaguchi et al. Directional Bonding and Asymmetry of Interfacial Structure in Intermetallic TiAl: Combined Theoretical and Electron Microscope Study
Journal Volume Year Pages Concerned
Phil. Mag. A ,78(5) 1997 1447-1459

Author Title of Article
M. Yamaguchi et al. An Auger investigation of the fracture behavior of PST TiAl alloys
Journal Volume Year Pages Concerned
Intermetallics 5 1997 281-288

Author Title of Article
M. Yamaguchi et al. Effects of Al-concentration and lamellar spacing on the room-temperature strength and ductility of PST crystals of TiAl
Journal Volume Year Pages Concerned
Materials Science Engineering A 239-240 1997 336-343

Author Title of Article
M. Yamaguchi et al. Alignment of the TiAl/Ti3Al lamellar microstructure in TiAl alloys by directional solidification
Journal Volume Year Pages Concerned
Materials Science Engineering A 239-240 1997 577-583

Author Title of Article
M. Yamaguchi et al. Dislocation dissociation in TiAl alloys
Journal Volume Year Pages Concerned
Materials Science Engineering A 233 1997 111-115

Author Title of Article
M. Yamaguchi et al. Composition and growth rate effects in directionally solidified TiAl alloys
Journal Volume Year Pages Concerned
Materials Science A 239-240 1997 570-576

Author Title of Article
M. Yamaguchi et al. A study of the cleavage fracture behavior of PST TiAl alloys
Journal Volume Year Pages Concerned
Materials Science A 239-240 1997 404-409

Author Title of Article
M. Yamaguchi et al. Microalloying effects in TiAl+Mo Alloys
Journal Volume Year Pages Concerned
Materials Science A 239-240 1997 702-708

Author Title of Article
M. Yamaguchi et al. Mechanical twinning in a 45‹<321> oriented polysynthetically twinned (PST) TiAl crystal at high strain rate and high temperature
Journal Volume Year Pages Concerned
Phil. Mag. A 78(1) 1998 239-253

Author Title of Article
M. Yamaguchi et al. Deformation of lamellar structure in TiAl-Ti3Al tow-phase alloys
Journal Volume Year Pages Concerned
Philosophical Magazine A 78-1 1998 1-28

Author Title of Article
M. Yamaguchi et al. Deformation and fracture of PST crystals and directionally solidified ingots of TiAl based alloys
Journal Volume Year Pages Concerned
Intermetallics 6,7-8 1998 679-683

Author Title of Article
M. Yamaguchi et al. Crystal Growth of TiAl Alloys
Journal Volume Year Pages Concerned
Intermetallics 6,7-8 1998 647-652

Author Title of Article
M. Yamaguchi et al. Microstructural Control of TiAl-Mo-B alloys by directional solidification
Journal Volume Year Pages Concerned
Acta Materialia 46,18 1998 375-394

Author Title of Article
M. Yamaguchi et al. Editorial Overview - Metals and alloy
Journal Volume Year Pages Concerned
Current Opinion in Solid State and Materials Science 2 1997 277-278

Author Title of Article
M. Yamaguchi et al. Plastic deformation of single crystals of NbSi2 with the C40 structure
Journal Volume Year Pages Concerned
Materials Science Engineering A 23-240 1997 69-74

Author Title of Article
M. Yamaguchi et al. Plastic deformation of single crystals of CrSi2 with the C40 structure
Journal Volume Year Pages Concerned
Materials Science Engineering A 23-240 1997 63-68

Author Title of Article
M. Yamaguchi et al. Single-srystal elastic constants of MoSi2 with the C11b structure
Journal Volume Year Pages Concerned
Materials Science Engineering A 23-240 1997 188-194

Author Title of Article
M. Yamaguchi et al. Plastic deformation of Mo(Si, Al)2 single crystals with C40 structure
Journal Volume Year Pages Concerned
Philosophical Magazine A 77-2 1997 375-394

Author Title of Article
M. Yamaguchi et al. Microstructure and mechanical properties of MoSi2 single crystals and directionally solidified MoSi2-based alloys
Journal Volume Year Pages Concerned
Progress in Materials Science 42 1997 193-207

Author Title of Article
M. Yamaguchi et al. Microstructure of Nb-Al powders consolidated by spark plasma sintering process
Journal Volume Year Pages Concerned
Mater. Sci. Eng. A239-240 1997 672-679

Author Title of Article
M. Yamaguchi et al. Plastic Deformation of Single Crystals of VSi2 and TaSi2 with the C40 Structures
Journal Volume Year Pages Concerned
Intermetallics 6,7-8 1998 723-728

Author Title of Article
M. Yamaguchi et al. Temperature dependence of single-crystals elastic constants of Mo(Si, Al)2 with the C40 structure
Journal Volume Year Pages Concerned
Intermetallics 6,7-8 1998 607-611

Author Title of Article
M. Yamaguchi et al. Dislocation processes during the deformation of MoSi2 single crystals in soft orientations
Journal Volume Year Pages Concerned
Mater. Sci. Eng A,261 1999 139-146

Author Title of Article
M. Yamaguchi et al. Brittle-ductile behavior of single crystals of MoSi2
Journal Volume Year Pages Concerned
Mater. Sci. Eng. A,261 1999 99-105

Author Title of Article
M. Yamaguchi et al. Plastic deformation of single crystals of MoSi2,
Journal Volume Year Pages Concerned
Acta Mater. 47,3 1999 937-949

Author Title of Article
M. Yamaguchi et al. Directional atomic bonds in MoSi2 and other transition-metal disilicides with the C11b, C40 and C54 structure
Journal Volume Year Pages Concerned
Sci. Eng. A,261 1999 158-164

Author Title of Article
M. Yamaguchi et al. Plastic deformation of single crystals of (Mo1-xWx)Si2 with the C11b structure
Journal Volume Year Pages Concerned
Mater. Sci. Eng. A,261 1999 131-138

Author Title of Article
M. Yamaguchi et al. Microstructure, mechanical properties and oxidation behavior of powder compacts of the Nb-Si-B system prepared by spark
Journal Volume Year Pages Concerned
Intermetallics 7 1999 1043-1048

Author Title of Article
M. Yamaguchi et al. Structure and chemistry of planar defects in bulk and thin film MoSi2
Journal Volume Year Pages Concerned
J. Electron Microscopy 48(6) 1999 689-700

Author Title of Article
M. Yamaguchi et al. Effects of Alloying Elements on Plastic Deformation of Single Crystals of MoSi2
Journal Volume Year Pages Concerned
Intermetallics 8 2000 1131-1145

Author Title of Article
M. Yamaguchi et al. Creep Deformation of Single Crystals of Binary and Some Ternary MoSi2 with the C11b Structure
Journal Volume Year Pages Concerned
Intermetallics 8 2000 1159-1168

Author Title of Article
M. Yamaguchi et al. Defect and Electronic Structures in TiSi2 Thin Films Produced by Co-sputtering I. Defect Analysis by Transmission Electron Microscopy
Journal Volume Year Pages Concerned
Acta Mater. 49 2001 83-92

Author Title of Article
M. Yamaguchi et al. Plastic deformation of single crystals of transition metal disilicides
Journal Volume Year Pages Concerned
Mater. Sci. Eng. A,233 1997 33-43

Author Title of Article
M. Yamaguchi et al. Plastic deformation of Mo(Si, Al)2 single crystals with C40 structure
Journal Volume Year Pages Concerned
MRS Symp. Proc. 460 1997 605-610

Author Title of Article
M. Yamaguchi et al. Stacking faults on (001) transition-metal disilicides with the C11b structure
Journal Volume Year Pages Concerned
MRS Symp. Proc. 460 1997 599-604

Author Title of Article
M. Yamaguchi et al. Effects of ternary alloying elements on plastic deformation of MoSi2 single crystals
Journal Volume Year Pages Concerned
Proc. PRICM-3, TMS @ 1998 2455-2460

Author Title of Article
M. Yamaguchi et al. High-temperature on situ straining experiments in the high-voltage electron microscope
Journal Volume Year Pages Concerned
Microscopy Microanalysis 4 1998 226-234

Author Title of Article
M. Yamaguchi et al. Vacancies and their clusters in MoSi2 studied by positron lifetime spectrometry
Journal Volume Year Pages Concerned
Intermetallics 6 1998 395-401

Author Title of Article
S. Kobayashi, M. Takeyama, T. Matsuo and M. Kikuchi Effect of Vanadium on Phase Equilibria among ƒΐ(B2), ƒΏ2, ƒΏ and ƒΑ Phases in Ti-Al Alloys
Journal Volume Year Pages Concerned
Report of the 123rd Committee on Heat-Resisting Materials and Alloys, Japan Society for the Promotion of Science 41 2000 201-212

Author Title of Article
Y. Yamamoto, H. Morishima, K. Koike, S. Y. Chang, M. Takeyama and T. Matsuo Lamellar Orientation Control of ƒΑ-TiAl Based Fully Lamellar Single Crystal
Journal Volume Year Pages Concerned
Report of the 123rd Committee on Heat-Resisting Materials and Alloys, Japan Society for the Promotion of Science 41 2000 213-222

Author Title of Article
M. Takeyama, Y. Yamamoto, H. Morishima, K. Koike, S. Y. Chang and T. Matsuo Lamellar orientation control of Ti-48Al PST crystal by unidirectional solidification
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
M. Takeyama, A. Yamauchi, T. Ueyama and T. Matsuo Effects of stoichiometry and Fe addition on crystal structure of Ni3Nb
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
Y. Yamamoto, M. Takeyama and T. Matsuo Stability of lamellar microstructure consisting of ƒΑ/ƒΑ interfaces in Ti-48Al-8Nb single crystal at elevated temperatures
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
A. Suzuki, M. Takeyama and T. Matsuo Phase transformation and ordering from ƒΐ-Ti to ƒΏ2-Ti3Al in Ti-Al binary system
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
T. Matsuo, T. Nozaki, T. Asai and M. Takeyama Role of lamellar plates in creep of TiAl alloy with fully lamellar structure
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
T. Asai, S. Hirata, M. Takeyama and T. Matsuo Microstructure in Ti-48at%Al PST crystal subjected to creep deformation
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
O. Takahashi, Y. Terada, M. Takeyama and T. Matsuo Creep characteristics and internal stress in ƒΑ-TiAl
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in print

Author Title of Article
M. Takeyama, S. Kobayashi, A. Sizuki and T. Matsuo A new aspect of microstructure control for gamma TiAl alloys based on the phase diagrams
Journal Volume Year Pages Concerned
High Temperature Ordered Intermetallic Alloys (Mater. Res. Soc. Symp. Proc) IX 2001 in print

Author Title of Article
Y. Yamamoto, H. Morishima, K. Koike, M. Takeyama and T. Matsuo Control of lamellar orientation in ƒΑ-TiAl based PST crystal by using seed crystals
Journal Volume Year Pages Concerned
High Temperature Ordered Intermetallic Alloys (Mater. Res. Soc. Symp. Proc) IX 2001 in print

Author Title of Article
M. Takeyama, H. Yokota, M. M. Ghanem and T. Matsuo Phase equilibria and microstructure control using Ni3Nb-ƒΒ phase in Ni-Nb-M ternary systems at elevated temperatures
Journal Volume Year Pages Concerned
Proc. THERMEC'2000 @ 2001 in print

Author Title of Article
Y. Yamamoto, M. Takeyama and T. Matsuo Thermal Instability of ƒΑ/ƒΑ Interfaces in Fully Lamellar Ti-48Al Single Crystal Alloys at Elevated Temperatures
Journal Volume Year Pages Concerned
Proc. THERMEC'2000 @ 2001 in print

Author Title of Article
Y. Yamamoto, M. Takeyama and T. Matsuo Change to ƒΑ grains structure of fully lamellar Ti-48Al-8Nb single crystal during aging at elevated temperatures
Journal Volume Year Pages Concerned
Proc. ISSI-3 @ 2001 to be published

Author Title of Article
Y. Nagae General Creep Characteristics of ƒΏ2 Single-Phase Polycrystalline Intermetallics
Journal Volume Year Pages Concerned
Materials Science and Engineering A213 1996 32-36

Author Title of Article
J. Koike High Temperature Strength of ƒΏTi-Al Alloys with a Locally Ordered Structure
Journal Volume Year Pages Concerned
Materials Science and Engineering A213 1996 98-102

Author Title of Article
K. Maruyama Creep Deformation and Creep Strength of TiAl
Journal Volume Year Pages Concerned
Materia Japan 35 1996 1070-1076

Author Title of Article
R. Yamamoto Microstructural Design of Fully Lamellar TiAl alloy for High Temperature Use
Journal Volume Year Pages Concerned
123rd Committee Rept. Japan Soc. Promotion Science 37 1996 203-210

Author Title of Article
K. Maruyama TiAl Based Light Intermetallics for High Temperature Applications
Journal Volume Year Pages Concerned
123rd Committee Rept. Japan Soc. Promotion Science 38 1997 287-297

Author Title of Article
K. Maruyama Effects of Lamellar Spacing, Volume Fraction and Grain Size on Creep Strength of Fully Lamellar TiAl alloys
Journal Volume Year Pages Concerned
Materials Science and Engineering A239/240 1997 419-428

Author Title of Article
R. Yamamoto Effects of Stress and Temperature on Lamellar Spacing Dependent Creep Strength of Fully Lamellar TiAl Alloys
Journal Volume Year Pages Concerned
Proceedings of the International Conference on Thermomechanical Processing of Steels and Other Materials @ 1997 1559-1565

Author Title of Article
R. Yamamoto High Temperature Mechanical Properties of Hot Pressed TiN with Fine Grain Size
Journal Volume Year Pages Concerned
Journal of Materials Science 33 1998 2047-2052

Author Title of Article
R. Yamamoto Effects of Volume Fraction of Constituent Phases of Fully Lamellar TiAl Alloys on Creep Strength
Journal Volume Year Pages Concerned
Proc. Third Pacific Rim International Conference on Advanced Materials and Processing @ 1998 2243-2348

Author Title of Article
R. Yamamoto Proc. Third Pacific Rim International Conference on Advanced Materials and Processing
Journal Volume Year Pages Concerned
Intermetallics 6 1998 699-702

Author Title of Article
T. Goto Coarse Grain Measures and Limit of Application to Worked Surface on X-ray Stress Measurement for TiAl Intermetallic Compound
Journal Volume Year Pages Concerned
Journal of the Society of Materials Science Japan 47 1998 1170-1177

Author Title of Article
N. Yamada Effect of Lamellar Spacing on Mechanical Properties of Fully Lamellar TiAl Alloys
Journal Volume Year Pages Concerned
Report of the 123rd Committee on Heat-Resisting Metals and Alloys, JSPS 40 1997 273-281

Author Title of Article
R. Yamamoto Importance of Microstructural Stability to Creep Strength of Fully Lamellar TiAl Alloys
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999 @ 1999 641-652

Author Title of Article
G. Wegmann Effect of the Lamellar Orientation on the Creep Resistance in Polysynthetically Twinned (PST) Ti-48mol%Al
Journal Volume Year Pages Concerned
Gamma Titanium Aluminides 1999 @ 1999 717-724

Author Title of Article
G. Wegmann Creep deformation of polysynthetically twinned (PST) Ti-48mol%Al
Journal Volume Year Pages Concerned
Key Engineering Materials 171-174 2000 709-716

Author Title of Article
R. Yamamoto Effect of Lamellar Spacing on Creep Strength of Ti-42mol%Al Alloy with Fully Lamellar Structure
Journal Volume Year Pages Concerned
Key Engineering Materials 171-174 2000 717-724

Author Title of Article
G. Wegmann Deformation Characteristics of Polysynthetically Twinned (PST) Crystals during Creep at 1150 K
Journal Volume Year Pages Concerned
Intermetallics 8 2000 165-177

Author Title of Article
K. Maruyama Microstructural Design Criteria of Fully Lamellar TiAl Alloys for Improved Creep strength
Journal Volume Year Pages Concerned
Journal de Physique IV 10 2000 Pr-6,9-14

Author Title of Article
G. Wegmann On the Microstructural Stability of TiAl/Ti3Al Polysynthetically Twinned (PST) Crystals under Creep Conditions
Journal Volume Year Pages Concerned
Philosophical Magazine A80 2000 2283-2298

Author Title of Article
K. Maruyama Effects of Lamellar Spacing on Mechanical Properties of a Fully Lamellar Ti-39.4mol%Al Alloys
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in press

Author Title of Article
K. Maruyama Saturation of Yield Stress and Embrittlement in Fine Lamellar TiAl Alloy
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in press

Author Title of Article
Hee Y. Kim Effect of Stress Axis Orientation on the Creep Deformation Behavior of Ti-48Al Polysynthetically Twinned (PST) Crystals
Journal Volume Year Pages Concerned
Materials Science and Engineering A @ 2001 in press

Author Title of Article
Hee Y. Kim Deformation Structure during Creep Deformation in Soft Orientation PST Crystals
Journal Volume Year Pages Concerned
Intermetallics 9 2001 accepted for publication

Author Title of Article
K. Maruyama Improvement of Creep Deformation Resistance by Control of Lamellar Microstructure in TiAl Alloys
Journal Volume Year Pages Concerned
Proceedings of the Third International Symposium on Structural @ 2001 accepted for publication

[Reference Books]
Author Title of Book
M. Yamaguchi et al. World Scientific
Publisher Year Pages
Interfacial structures and mechanical properties of Titaniumu Aliminides (Chapter 2) Microstructure and Properties Vol. 2 2000 79-138


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