Thermodynamic calculation of the T0 curve and metastable phase diagrams of the Ti–M (M = Mo,V, Nb,Cr, Al) binary systems |
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| Affiliation: | 1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, PR China;2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, PR China;1. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing, 100083, China;2. School of Materials Science and Engineering, Shandong Jianzhu University, Jinan, Shandong Province, 250101, China;3. School of Mechanic and Electrical Engineering, Yangtze Normal University, Chongqing, 408100, China;1. High-performance Ceramics Division, Shenyang National Laborat ory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 110016 Shenyang, China;2. Institute for Applied Materials-Applied Materials Physics (IAM-AWP), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany;1. Materials Genome Institute, Shanghai University, 200444, Shanghai, China;2. School of Materials Science and Engineering, Shanghai University, 200444, Shanghai, China;1. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, PR China;2. Beijing Key Laboratory of Materials Genome Engineering, Beijing 100083, PR China;3. Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, Beijing 100083, PR China;4. Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, PR China;5. Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing 100083, PR China;6. State Key Laboratory of Powder Metallurgy, Central South University, Hunan 410083, PR China;1. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui, 232001, PR China;2. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, PR China;3. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, PR China;4. Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health, Huainan, Anhui, 232001, PR China |
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| Abstract: | Based on the experimental data available in the literature, the β-α′/α′′⬠ martensitic transformation and athermal ω formation of the Ti–M (M = Mo, V, Nb, Cr, Al) binary systems at low temperature are thermodynamically described. According to β-α′/α′′⬠ martensitic transformation and metastable ω phase formation temperatures, thermodynamic parameters of these systems are assessed by means of the CALPHAD (CALculation Phase Diagram) approach supported by first-principles calculations. In addition to the metastable ω phase, only solution phases, i.e. liquid, α(hcp), β(bcc) or γ(fcc) are included and their thermodynamic parameters are adopted in the literature or revised in this work. The metastable phase diagrams of the Ti–M (M = Mo, V, Nb, Cr, Al) systems with T0(β/α) and T0(β/ω) curves are calculated using the obtained parameters. Comparisons between the calculated results and experimental data reported in the literature show that almost all the reliable experimental information can be satisfactorily accounted for by the present modeling. |
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| Keywords: | Ti-based alloys Metastable phase diagram Thermodynamics CALPHAD |
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