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Open Access Effect of Solution Treatment Temperature on Microstructural Evolution of Ti2AlNb-based Alloy

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¬†¬†Intermetallic alloys based on an ordered orthorhombic Ti2AlNb phase are considered as promising materials for aerospace applications. The mechanical properties of the Ti2AlNb-based intermetallic alloy with three phases of O, B2 and a2, are sensitive with the phases and microstructure. In the present work, phase transformation of Ti2AlNb-based alloy during solution treatment at elevated temperatures was investigated by using optical microstructure (OM), scanning electron microscope (SEM), and transmission electron microscope (TEM). The results indicated that the transformation from O to B2 phase occurred and the α2 phase gradually vanishes with increasing the solution treatment temperature. The solution treatment temperature determine the amounts of O, B2 and α2 phase and their final microstructural morphologies, and also determine the properties of the material.
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Keywords: O phase; Ti2AlNb alloy; phase transformation; solution treatment

Document Type: Research Article

Affiliations: 1: National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology, Harbin 150001, China 2: College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China 3: School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning China

Publication date: June 15, 2015

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  • Journal of Aeronautical Materials, founded in 1981, is sponsored by Chinese Society of Aeronautics and Astronautics, and edited and published by editiorial board of Journal of Aeronautical Materials,AVIC Beijing Institute of Aeronautical Material(BIAM).It has been indexed in Scopus (Holland), INSPEC (U.K.), AJ (Russia), CA (US) and UPD (US). Journal of Aeronutical Materials is devoted to reporting new and original experimental and theoretical basic research of aeronautical materials, such as composite design,technology,testing and charaacterizing, and so on.
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