H. A. Lipsitt, Aviation Week, p.81, 1976.

R. C. Westwood, Materials for advanced studies and devices, Metallurgical Transactions B, vol.28, issue.2, p.155, 1988.
DOI : 10.1007/BF02654199

J. L. Murray, Phase Diagrams of Binary Titanium Alloys, ASM Int. Metal Park, 1987.

K. Hashimoto, H. Doi, and T. Tsujimoto, Reexamination of the Ti–Al–V Ternary Phase Diagram, Transactions of the Japan Institute of Metals, vol.27, issue.10, p.741, 1986.
DOI : 10.2320/matertrans1960.27.741

H. Nagai, T. Tabahashi, and H. Oikawa, Effect of grain size on creep of Ti-53.4mol%Al intermetallics at 1100 K, Journal of Materials Science, vol.101, issue.1, p.629, 1990.
DOI : 10.1007/BF00714087

M. Yamaguchi and Y. Umakoshi, The deformation behaviour of intermetallic superlattice compounds, Progress in Materials Science, vol.34, issue.1, p.1, 1990.
DOI : 10.1016/0079-6425(90)90002-Q

T. Hanamura, R. Uemori, and M. Tanino, Mechanism of plastic deformation of Mn-added TiAl L 10 -type intermetallic compound, Journal of Materials Research, vol.3, issue.04, p.656, 1988.
DOI : 10.1557/JMR.1988.0656

T. Kawabata, T. Tamura, and O. Izumi, Effect of Ti/Al ratio and Cr, Nb, and Hf additions on material factors and mechanical properties in TiAl, Metallurgical Transactions A, vol.38, issue.1, p.141, 1993.
DOI : 10.1016/0956-7151(90)90106-Q

S. ?. Huang and E. L. Hall, The effects of Cr additions to binary TiAl-base alloys, Metallurgical Transactions A, vol.133, issue.11, p.2619, 1991.
DOI : 10.1007/BF02851355

B. D. Worth, J. W. Jones, and J. E. Allison, Creep deformation in near-?? TiAl: Part 1. the influence of microstructure on creep deformation in Ti-49Al-1V, Metallurgical and Materials Transactions A, vol.41, issue.11, p.2947, 1995.
DOI : 10.1007/BF02669651

F. H. Froes, Synthesis, properties and applications of titanium aluminides, Journal of Materials Science, vol.41, issue.9, p.5113, 1992.
DOI : 10.1007/BF02403806

M. Wagner and . Yamaguchi, Structural Intermellics, The Minerals & Materials Society, p.668, 1997.

Y. Umakoshi, T. Nakano, and T. Yamane, The effect of orientation and lamellar structure on the plastic behavior of TiAl crystals, Materials Science and Engineering: A, vol.152, issue.1-2, p.81, 1992.
DOI : 10.1016/0921-5093(92)90050-B

M. A. Morris, Dislocation configurations in two phase TiAl alloys. II. Structures after compression, Philosophical Magazine A, vol.34, issue.2, p.259, 1993.
DOI : 10.1557/JMR.1992.1735

. Yamaguchi, Gamma Titanium Aluminium, p.737, 1995.

S. ?. Huang, Microstructures and property tradeoffs in wrought TiAl-base alloys, Metallurgical Transactions A, vol.128, issue.1, p.375, 1992.
DOI : 10.1007/BF02660879

K. S. Chan and S. S. Donald, Fatigue and fracture behavior of a fine-grained lamellar TiAl alloy, Metallurgical and Materials Transactions A, vol.24, issue.5, p.79, 1997.
DOI : 10.1007/s11661-997-0084-8

R. Gnanamoorthy and Y. Mutor, Fracture toughness of gamma-base titanium aluminides, Metallurgical and Materials Transactions A, vol.5, issue.2, p.305, 1995.
DOI : 10.1007/BF02664668

H. E. Deve, A high-toughness ??-titanium aluminide, Acta Metallurgica et Materialia, vol.40, issue.6, p.1259, 1992.
DOI : 10.1016/0956-7151(92)90425-E

K. S. Chan, Y. ?. Kim, and . Metall, Relationships of slip morphology, microcracking, and fracture resistance in a lamellar TiAl-alloy, Metallurgical and Materials Transactions A, vol.24, issue.5, p.1217, 1994.
DOI : 10.1007/BF02652296

K. S. Chan, Toughening mechanisms in titanium aluminides, Metallurgical Transactions A, vol.148, issue.8, p.569, 1993.
DOI : 10.1016/0956-716X(90)90536-P

K. S. Chan, Micromechanics of shear ligament toughening, Metallurgical Transactions A, vol.5, issue.9, p.2021, 1991.
DOI : 10.1007/BF02669869

K. S. Chan, Evidence of shear ligament toughening in TiAl-base alloys, Metallurgical and Materials Transactions A, vol.39, issue.7, p.1407, 1995.
DOI : 10.1007/BF02647591

K. S. Chan, Tensile ductility of extrinsically toughened intermetallics, Metallurgical and Materials Transactions A, vol.37, issue.(5), p.299, 1994.
DOI : 10.1007/BF02647975

J. Beddoes, W. Wallace, and L. Zhao, Current understanding of creep behaviour of near ??-titanium aluminides, International Materials Reviews, vol.2, issue.5, p.197, 1995.
DOI : 10.1016/1044-5803(94)90142-2

G. Hug, Nature and dissociation of the dislocations in TiAl deformed at room temperature, Philosophical Magazine A, vol.20, issue.1, p.47, 1986.
DOI : 10.1080/01418618208239909

H. Inui and K. Kishide, Temperature dependence of yield stress, tensile elongation and deformation structures in polysynthetically twinned crystals of Ti-Al, Philosophical Magazine A, vol.12, issue.6, p.1609, 1995.
DOI : 10.1080/01418619508243933

V. K. Vasudevan, M. A. Stucke, S. A. Court, and H. L. Fraser, Al on the deformation mechanisms in TiAl, Philosophical Magazine Letters, vol.59, issue.6, p.299, 1989.
DOI : 10.1080/14786436908217764

K. S. Chan and K. Y. Metall, Rate and environmental effects on fracture of a two-phase TiAl-alloy, Metallurgical Transactions A, vol.24, issue.6, p.113, 1993.
DOI : 10.1016/0956-716X(90)90536-P

W. O. Soboyejo, D. S. Schwaatz, and S. M. Sastry, An Investigation of the fracture behavior of gamma-based titanium aluminides: Effects of annealing in the ?? + ?? and ??2 + ?? phase fields, Metallurgical Transactions A, vol.85, issue.7, p.2039, 1992.
DOI : 10.1007/BF00900443

F. Appel, P. A. Beaven, and R. Wagner, Deformation processes related to interfacial boundaries in two-phase ??-titanium aluminides, Acta Metallurgica et Materialia, vol.41, issue.6, pp.1721-1732, 1993.
DOI : 10.1016/0956-7151(93)90191-T

Y. Kim, Microstructural evolution and mechanical properties of a forged gamma titanium aluminide alloy, Acta Metallurgica et Materialia, vol.40, issue.6, pp.1121-1134, 1992.
DOI : 10.1016/0956-7151(92)90411-7

C. T. Liu and P. J. Maziasz, Microstructural control and mechanical properties of dual-phase TiAl alloys, Intermetallics, vol.6, issue.7-8, pp.653-661, 1998.
DOI : 10.1016/S0966-9795(98)00062-4

M. Wagner and . Yamaguchi, Gamma Titanium Aluminides, pp.665-678, 1995.

W. Wunderlich, . Th, G. Kremser, and . Frommeyer, Mobile dislocations at the ??2/?? phase boundaries in intermetallic TiAl/Ti3Al-alloys, Acta Metallurgica et Materialia, vol.41, issue.6, pp.1791-1799, 1993.
DOI : 10.1016/0956-7151(93)90199-3

. Yamaguchi, Structural Intermellics, The Minerals & Materials Society, p.545, 1997.

M. A. Morris and M. Leboeuf, Grain-size refinement of ??-Ti-Al alloys: effect on mechanical properties, Materials Science and Engineering: A, vol.224, issue.1-2, pp.1-11, 1997.
DOI : 10.1016/S0921-5093(96)10532-3

M. A. Morris, Deformation mechanisms in fine-grained Ti-Al alloys, Materials Science and Engineering: A, vol.224, issue.1-2, pp.12-20, 1997.
DOI : 10.1016/S0921-5093(96)10533-5

J. L. Lebrun and J. M. Sprauel, Ecole d'Eté d'Oleron, press du CNRS-IRSID, p.135, 1990.

D. Kaplan, Les methods de mesure des contraintes par trépanage et par enlèvement de couches, IRSID P. E, vol.3587, pp.2-33, 1983.

A. Lari and J. F. Flavenot, Mesure des contraintes résiduelles : méthode de la flèche, méthode de la source des contraintes, VDI-BERICHTE, pp.313-493, 1978.

L. Castex and J. M. Sprauel, Revue français de mécanique, pp.5-12, 1987.

W. Voigt, Theoretische Studien Uber die Elastizitatsverheltnisse der Kristalle, inpart, p.47, 1887.

A. Reuss, Berechnung der Flie??grenze von Mischkristallen auf Grund der Plastizit??tsbedingung f??r Einkristalle ., ZAMM - Zeitschrift f??r Angewandte Mathematik und Mechanik, vol.8, issue.1, p.49, 1929.
DOI : 10.1002/zamm.19290090104

P. Predecki, A. Abuhasan, and C. S. Barett, Advances in X-ray analysis, pp.31-231, 1988.
DOI : 10.1007/978-1-4615-1797-9

H. P. Klug and L. E. Alexander, X-ray diffraction procedures, 1974.

M. Wilkens, The determination of density and distribution of dislocations in deformed single crystals from broadened X-ray diffraction profiles, Physica Status Solidi (a), vol.12, issue.2, p.359, 1970.
DOI : 10.1002/pssa.19700020224

S. Denale and . Hanada, The Minerals, The Third Pacific Rim International Conference on Advanced Materials and Processing (PRICM 3), p.344, 1998.

Y. Kim, Microstructural evolution and mechanical properties of a forged gamma titanium aluminide alloy, Acta Metallurgica et Materialia, vol.40, issue.6, pp.1121-1134, 1992.
DOI : 10.1016/0956-7151(92)90411-7

M. H. Yoo and C. L. Fu, Physical constants, deformation twinning, and microcracking of titanium aluminides, Metallurgical and Materials Transactions A, vol.41, issue.193, pp.49-63, 1998.
DOI : 10.1007/s11661-998-0158-2

F. Appel, U. Lorenz, U. Sparka, and R. Wagner, Effects of dislocation dynamics and microstructure on crack growth mechanisms in two-phase titanium aluminide alloys, Intermetallics, vol.6, issue.7-8, pp.603-605, 1998.
DOI : 10.1016/S0966-9795(98)80001-0

A. Z. Reuss, Berechnung der Flie??grenze von Mischkristallen auf Grund der Plastizit??tsbedingung f??r Einkristalle ., ZAMM - Zeitschrift f??r Angewandte Mathematik und Mechanik, vol.8, issue.1, p.49, 1929.
DOI : 10.1002/zamm.19290090104

A. Zaoui, Colloque organisé conjointement par la section du Sud-Est, La SFM et Mecamat, 1-2 Décem, 1988.

T. Mura, Micromechanics of defects in solids, 1987.

B. Budiansky, On the elastic moduli of some heterogeneous materials, Journal of the Mechanics and Physics of Solids, vol.13, issue.4, pp.223-227, 1965.
DOI : 10.1016/0022-5096(65)90011-6

R. Hill, A self-consistent mechanics of composite materials, Journal of the Mechanics and Physics of Solids, vol.13, issue.4, pp.213-227, 1965.
DOI : 10.1016/0022-5096(65)90010-4

Z. Hashin and S. Shtrikman, A variational approach to the theory of the elastic behaviour of multiphase materials, Journal of the Mechanics and Physics of Solids, vol.11, issue.2, p.127, 1963.
DOI : 10.1016/0022-5096(63)90060-7

R. Gnanamoorthy, Y. Mutoh, and Y. Mizuhara, Flexural strength of gamma base titanium aluminides at room and elevated temperatures, Materials Science and Engineering: A, vol.197, issue.1, pp.69-77, 1995.
DOI : 10.1016/0921-5093(94)09737-2

G. P. Tandon and G. J. Weng, A Theory of Particle-Reinforced Plasticity, Journal of Applied Mechanics, vol.55, issue.1, p.126, 1988.
DOI : 10.1115/1.3173618

M. H. Yoo and C. L. Fu, Physical constants, deformation twinning, and microcracking of titanium aluminides, Metallurgical and Materials Transactions A, vol.41, issue.193, pp.49-63, 1998.
DOI : 10.1007/s11661-998-0158-2

D. Shechtman, M. J. Blachkburn, and H. A. Lipsitt, The plastic deformation of TiAl, Metallurgical Transactions, vol.221, issue.6, pp.1373-1381, 1974.
DOI : 10.1007/BF02646623

Y. P. Qiu and G. J. Weng, The influence of inclusion shape on the overall elastoplastic behavior of a two-phase isotropic composite, International Journal of Solids and Structures, vol.27, issue.12, pp.1537-1559, 1991.
DOI : 10.1016/0020-7683(91)90076-R