Effect of deformation temperature on the microstructure characteristics of α phase in Ti‐40Al‐8Nb‐0.5B alloys

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. (© 2020 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)