THE α_2/γ INTERFACIAL STRUCTURE CHANGES IN A DUAL-PHASE γ-TiAl ALLOY AFTER HOT DEFORMATION AND SUBSEQUENT SHORT-TIME ANNEALING

Abstract

Abstract: The nonequilibrium α2/γ interfacial structures have been studied using the conventional and high-resolution transmission electron microscope. The nonequilibrium γ/γ and α2/γ interfaces are important microstructure features of hot-forged Ti-45Al-8Nb2.5Mn-0.05B alloys. The characteristics of these nonequilibrium interfacial boundaries include the frequent interfacial ledges and the deviation from the conventional orientation relationship {111}γ.

Key words: α_2/γinterface, interface, deformation twin, HRTEM

L.C. Zhang; G.L. Chen; J. G. Wang and H.Q. Ye(State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing,Beijing 100083, China.)(Laboratory of Atomic Imaging of Solids, Institute of Metal Research, Chinese Academy of Sciences,Shenyang 110015, China). THE α_2/γ INTERFACIAL STRUCTURE CHANGES IN A DUAL-PHASE γ-TiAl ALLOY AFTER HOT DEFORMATION AND SUBSEQUENT SHORT-TIME ANNEALING[J]. Acta Metallurgica Sinica (English Letters), 1997, 10(6): 501-509.

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THE α_2/γ INTERFACIAL STRUCTURE CHANGES IN A DUAL-PHASE γ-TiAl ALLOY AFTER HOT DEFORMATION AND SUBSEQUENT SHORT-TIME ANNEALING

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