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Microstructural Control of TiAl Alloys Containing Mo with Different Aluminum Content

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TiAl alloys have received a lot of attention due to their high specific strength, wide applicability and their potential to replace Ni based superalloys. However, the TiAl alloys exhibits low creep properties at ∼800 °C and brittleness at room temperature. In the present study, phase equilibria of the Ti–Al–Mo system were calculated via PandatTM software. A few alloy compositions were selected for experimental study and the corresponding microstructures were investigated. The two-phase or three-phase microstructures were composed of α, β and γ which can be obtained through proper adjustment of the alloy composition in the Ti–Al–Mo system. The phase selection and control are discussed in terms of isothermal phase diagram.

Keywords: HEAT TREATMENT; MICROSTRUCTURE; PHASE TRANSFORMATION; TIAL ALLOY

Document Type: Research Article

Publication date: November 1, 2017

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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