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Philosophical Magazine A Volume 71, 1995 - Issue 6
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Original Articles

Modelling the flow stress anomaly in γ-TiAl I. Experimental observations of dislocation mechanisms

Bernard Viguier IGA, Département de Physique, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
,
Kevin J. Hemker Department of Mechanical Engineering, Johns Hopkins University, Baltimore, Maryland, 21218-2686, USA
,
Joël Bonneville IGA, Département de Physique, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
,
Francois Louchet Groupe Physique du Métal, Laboratoire de Thermodynamique et Physico-chimie Métallurgiques, Ecole nationale Supérieure d'Electrochimie et d'Electrométallurgie de Grenoble, Institut National Polytechnique de Grenoble, BP 75, 38402, St Martin d'Héres Cedex, France
&
Jean-Luc Martin IGA, Département de Physique, Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
Pages 1295-1312 | Received 24 Oct 1994, Accepted 25 Nov 1994, Published online: 04 Oct 2006

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Lin Song, Junpin Lin & Jinshan Li. (2017) Ordinary dislocation configurations in high Nb-containing TiAl alloy deformed at high temperatures. Philosophical Magazine 97:7, pages 515-526.
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I. H. Katzarov, M. J. Cawkwell, A. T. Paxton & M. W. Finnis. (2007) Atomistic study of ordinary screw dislocations in single-phase and lamellar γ-TiAl. Philosophical Magazine 87:12, pages 1795-1809.
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J. B. Singh, G. Molénat, M. Sundararaman, S. Banerjee, G. Saada, P. Veyssière & A. Couret. (2006) The activation and the spreading of deformation in a fully lamellar Ti–47 at.% Al–1 at.% Cr–0.2 at.% Si Alloy. Philosophical Magazine 86:16, pages 2429-2450.
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T. Nakano , K. Hayashi, Y. Umakoshi, Y.-L. Chiu & P. Veyssière. (2005) Effects of Al concentration and resulting long-period superstructures on the plastic properties at room temperature of Al-rich TiAl single crystals. Philosophical Magazine 85:22, pages 2527-2548.
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Patrick Veyssière & Fabienne Grégori. (2002) Properties of {110](111} slip in Al-rich γ-TiAl deformed at room temperature II. The formation of strings of prismatic loops. Philosophical Magazine A 82:3, pages 567-577.
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Fabienne Grégori & Patrick Veyssière. (2002) Properties of <110]{111} slip in Al-rich γ-TiAl deformed at room temperature I. Transmission electron microscopy analysis of deformation debris. Philosophical Magazine A 82:3, pages 553-566.
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Fabienne Grégori, Philippe Penhoud & Patrick Veyssière. (2001) Extrinsic factors influencing the yield stress anomaly of Al-rich γ-TiAl. Philosophical Magazine A 81:3, pages 529-542.
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A. Couret. (1999) An in-situ study of ordinary dislocation glide in γ-TiAl alloys. Philosophical Magazine A 79:8, pages 1977-1994.
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D. Häussler, M. Bartsch, M. Aindow, I.P. Jones & U. Messerschmidt. (1999) Dislocation processes during the plastic deformation of γ-TiAl. Philosophical Magazine A 79:5, pages 1045-1071.
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S. Jiao, N. Bird, P.B. Hirsch & G. Taylor. (1998) Yield stress anomalies in single crystals of Ti-54.5 at.% Al: I. Overview and (011) superdislocation slip. Philosophical Magazine A 78:3, pages 777-802.
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Julia Panova & Diana Farkas. (1998) Atomistic simulation of dislocation core configurations in TiAl. Philosophical Magazine A 78:2, pages 389-404.
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Min Lu & K.J. Hemker. (1998) The influence of pre-strain on the flow strength and microstructural evolution of polycrystalline γ-TiAl. Philosophical Magazine A 77:2, pages 325-339.
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Seshagiri Sriram, DennisM. Dimiduk, PeterM. Hazzledine & VijayK. Vasudevan. (1997) The geometry and nature of pinning points of ½ ⟨110] unit dislocations in binary TiAl alloys. Philosophical Magazine A 76:5, pages 965-993.
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J.P. Simmons, S.I. Rao & D.M. Dimiduk. (1997) Atomistics simulations of structures and properties of ½⟨110⟩ dislocations using three different embedded-atom method potentials fit to γ-TiAl. Philosophical Magazine A 75:5, pages 1299-1328.
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H. Inui, M. Matsumuro, D.-H. Wu & M. Yamaguchi. (1997) Temperature dependence of yield stress, deformation mode and deformation structure in single crystals of TiAl (Ti−56 at.% Al). Philosophical Magazine A 75:2, pages 395-423.
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C. Woodward & J.M. Maclaren. (1996) Planar fault energies and sessile dislocation configurations in substitutionally disordered Ti-Al with Nb and Cr ternary additions. Philosophical Magazine A 74:2, pages 337-357.
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B. Viguier & K.J. Hemker. (1996) Characterizing faulted dipoles in deformed gamma TiAl. Philosophical Magazine A 73:3, pages 575-599.
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François Louchet. (1995) Flow stress anomalies, mobile dislocation exhaustion and strain rate sensitivity. Philosophical Magazine A 72:4, pages 905-912.
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Francois Louchet & Bernard Viguier. (1995) Modelling the flow stress anomaly in γ-TiAl II. The local pinning-unzipping model: Statistical analysis and consequences. Philosophical Magazine A 71:6, pages 1313-1333.
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