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An ideal method has been established for calculating the precipitation ofα2 ordered phase in near-αtitanium alloys based on the theory on the critical electron concentration for the precipitation ofα2 ordered phase in near-αtitanium alloys. With complete precipitation ofα2 phase in near-αtitanium alloys, the alloys can be considered to be composed of two parts: (1) theα2 ordered phase with the stoichiometric atomic ratio of Ti3X; (2) the disorder solid solution with the critical composition in which theα2 ordered phase is just unable to precipitate. By using this method, the volume fractions ofα2 ordered phase precipitated in Ti-Al, Ti-Sn, Ti-Al-Sn-Zr alloys with various Al, Sn and/or Zr contents have been calculated. The influences of Al and Sn on the precipitation ofα2 ordered phase are discussed. The calculating results show substantial agreement with the experimental ones.
An ideal method has been established for calculating the precipitation of α2 ordered phase in near-αtitanium alloys based on the theory on the critical electron concentration for the precipitation of α2 ordered phase in near-αtitanium alloys. With complete precipitation of α2 phase in near-αtitanium alloys, the alloys can be considered as be composed of two parts: (1) the α2 ordered phase with the stoichiometric atomic ratio of Ti3X; (2) the disorder solid solution with the critical composition in which theα2 ordered phase is just unable to precipitate. This method, the volume fractions of α2 ordered phase precipitated in Ti-Al, Ti-Sn, Ti-Al-Sn-Zr alloys with various Al, Sn and / or Zr contents have been calculated. The influences of Al and Sn on the precipitation ofα2 ordered phase are discussed. The calculation results show substantial agreement with the experimental ones.