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Effect of Deformation Temperature on the Microstructure Characteristics of α Phase in Ti‐40Al‐8Nb‐0.5B Alloys
Author(s) -
Yang Xiaoxiao,
Yang Guang,
Wang Yifei,
Liu Yanhui,
Li Yuzhi,
Wang Pengyi,
Ren Wei
Publication year - 2020
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201900183
Subject(s) - materials science , microstructure , equiaxed crystals , deformation (meteorology) , lath , phase (matter) , recrystallization (geology) , dynamic recrystallization , composite material , texture (cosmology) , metallurgy , martensite , hot working , geology , chemistry , paleontology , image (mathematics) , organic chemistry , artificial intelligence , computer science
In this work, microstructure characteristics of α phase in Ti‐40Al‐8Nb‐0.5B alloys (at%) after deformation in the β and (β+α) phase regions are examined. The experimental results indicate that the microstructure characteristics of the α phase are considerably affected by the deformation temperature. During the deformation in the β phase area, the β phase is not only elongated perpendicular to the compression direction, but also presents a 〈100〉‐〈111〉 double fiber texture. After the β→α transformation, a part of the α phase exhibits an equiaxed morphology and the others show lath‐like shapes. Due to the microstructural heredity, the α phase of the sample deformed in the β phase field presents a 〈11‐20〉‐〈10‐10〉 double fiber texture. In contrast, refined α phase with randomly distributed orientation is produced after the deformation in the (β+α) phase field and this is caused by the dynamic recrystallization during the deformation process.