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Solution Temperature Sensitivity for Primary α-Phase Volume Fraction of Ti750 Alloys |
CHEN Chaoyang1,2,CHEN Zhiyong1,ZHU Shaoxiang1,LIU Jianrong1( ),WANG Qingjiang1 |
1. Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China |
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Cite this article:
CHEN Chaoyang,CHEN Zhiyong,ZHU Shaoxiang,LIU Jianrong,WANG Qingjiang. Solution Temperature Sensitivity for Primary α-Phase Volume Fraction of Ti750 Alloys. Chinese Journal of Materials Research, 2019, 33(10): 794-800.
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Abstract Solution temperature (T) sensitivity for the volume fraction (V) of primary α-phase in the α+β-phase field of two Ti750 alloys with 0.25 Mo and 1.0 Mo (mass fraction%) were comparatively investigated. The results show that the variation of volume fraction of primary α-phase with temperature seems to follow a negative power function curve, with a slow initial reduction and then rapid reduction with the increase of temperature for both alloys. The V-T curve for the alloy with 0.25% Mo showed a steeper slope compared with the alloy with 1.0% Mo, indicating that with the increase of Mo addition, the decrease of solution temperature sensitivity may emerge for the volume fraction of the primary α-phase in the α+β-phase field of Ti750 alloys. In the two alloys with the same volume fraction of primary α-phase, the Al concentration in the primary α-phase of the alloy with 1.0% Mo is higher than that of alloy with 0.25 % Mo. In other word, Mo indirectly increases the thermodynamic stability of the primary α-phase and thus reduces the temperature sensitivity of the volume fraction of α-phase in Ti750 alloy.
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Received: 21 March 2019
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