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Phase transformation and equation of state in Ti–45Al alloy under high pressure AITranslate

Xi Li; Ruixiang Zhu; Jinghua Xin; Minsi Luo; ShunLi Shang; ZiKui Liu; Chongshan Yin; KenIchi Funakoshi; Rian Johannes Dippenaar; Yuji Higo; Ayumi Shiro; Mark Reid; Takahisa Shobu; Koichi Akita; WeiBing Zhang; KlausDieter Liss;
Changsha University of Science and Technology; Changsha University of Science and Technology; Tianjin Research Institute for Water Transport Engineering. M.O.T.; Changsha University of Science and Technology; University Park; University Park; Changsha University of Science and Technology;Neutron Science and Technology Center, Comprehensive Research Organization for Science and Society; University of Wollongong; Japan Synchrotron Radiation Research Institute; National Institutes for Quantum Science and Technology; University of Wollongong;Materials Sciences Research Center, Japan Atomic Energy Agency; Tokyo City University; Changsha University of Science and Technology; University of Wollongong
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Publisher: Elsevier
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Abstract AITranslate

The phase transformations and pressure-volume dependencies of the Ti–45Al alloy with respect to pressure have been investigated by means of in-situ observation using multi anvil-type high-pressure devices and synchrotron radiation. Under hydrostatic compression from 0 to 10.1 GPa, about 2.3 vol % of γ transforms continuously to α2. Lattice parameters as well as volume fractions of these two phases have been determined as functions of pressure. Bulk moduli estimated using Birch-Murnaghan`s equation of state are 146.2 GPa for the γ phase, 136.7 GPa for the α2 phase, and 145.6 GPa for their two-phase mixture of Ti–45Al alloy. First-principles have also applied to investigate bulk moduli of two single phases, and the deviation between calculations and measurements is discussed and attributed to mainly phase transformation. The present study provides useful insights into thermodynamics of α2 and γ phases under high pressure.

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DOI：https://doi.org/10.1016/j.calphad.2023.102641

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Citation Information:

The phase transformations and pressure-volume dependencies of the Ti–45Al alloy with respect to pressure have been investigated by means of in-situ observation using multi anvil-type high-pressure devices and synchrotron radiation. Under hydrostatic compression from 0 to 10.1 GPa, about 2.3 vol % of γ transforms continuously to α2. Lattice parameters as well as volume fractions of these two phases have been determined as functions of pressure. Bulk moduli estimated using Birch-Murnaghan`s equation of state are 146.2 GPa for the γ phase, 136.7 GPa for the α2 phase, and 145.6 GPa for their two-phase mixture of Ti–45Al alloy. First-principles have also applied to investigate bulk moduli of two single phases, and the deviation between calculations and measurements is discussed and attributed to mainly phase transformation. The present study provides useful insights into thermodynamics of α2 and γ phases under high pressure.

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GB/T 7714-2015 [1] Xi Li, Ruixiang Zhu, Jinghua Xin, et al. Calphad, 2024(84). DOI:10.1016/j.calphad.2023.102641.
MLA [1] Xi Li, et al., Calphad, no. 84, 2024, https://doi.org/10.1016/j.calphad.2023.102641.
APA [1] Xi Li, Ruixiang Zhu, Jinghua Xin, Minsi Luo, ShunLi Shang, ZiKui Liu, Chongshan Yin, KenIchi Funakoshi, Rian Johannes Dippenaar, Yuji Higo, Ayumi Shiro, Mark Reid, Takahisa Shobu, Koichi Akita, WeiBing Zhang, & KlausDieter Liss. (2024). Calphad(84). https://doi.org/10.1016/j.calphad.2023.102641
IEEE [1] Xi Li, Ruixiang Zhu, Jinghua Xin, Minsi Luo, ShunLi Shang, ZiKui Liu, Chongshan Yin, KenIchi Funakoshi, Rian Johannes Dippenaar, Yuji Higo, Ayumi Shiro, Mark Reid, Takahisa Shobu, Koichi Akita, WeiBing Zhang, and KlausDieter Liss, Calphad, no. 84, 2024, doi: 10.1016/j.calphad.2023.102641.