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Open Access Effects of Cr Content on Microstructure and Mechanical Properties of Ti5Mo5V3Al-xCr Alloys

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  Different Cr contents of Ti5Mo5V3Al-xCr (x = 1.0, 3.0, 5.0, 7.0, 9.0) alloys were solution treated in β phase region (above the phase transition point 20) and α+β phase region (below the phase transition point 30). And then aging at the same temperature of 520. The mechanical properties results show that the aging strengthening capacity of alloys decreased with increasing Cr content. Scanning electron microscopic and X-ray diffraction were used to analyze the correlation between the micro factors (such as phase composition, phase content, phase size and phase morphology) and the macro mechanical properties in different heat treatment conditions. The results show that the aging strengthening mechanism of Ti5Mo5V3Al-xCr alloys is mainly caused by the precipitation of α s phase in the process of aging. The aging strengthening capacity of alloys is closely related to the number of α s phase and the size of α s phase. The precipitation mechanism of α s phase is mainly dominated by the content of Cr element in Ti5Mo5V3Al-xCr alloys.
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Keywords: Cr content; Ti5Mo5V3Al-xCr alloys; aging strengthening; αs phase

Document Type: Research Article

Affiliations: 1: Powder Metallurgy & Special Material Research Department, General Research Institute For Non-Ferrous Metals, Beijing 100088, China 2: State Key Laboratory for Fabrication &Processing of Non-ferrous Metals, General Research Institute for Non-ferrous Metals, Beijing 100088, 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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