1. Effect of pre-deformation in the β phase field on the microstructure and texture of the α phase in a boron-added β-solidifying TiAl alloy
- Author
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Chen Yi, Fengbo Han, Song Wenjie, Wei Ren, Yanhui Liu, Guang Yang, and Liang Cheng
- Subjects
010302 applied physics ,Materials science ,Morphology (linguistics) ,Mechanical Engineering ,Alloy ,Metals and Alloys ,Nucleation ,chemistry.chemical_element ,02 engineering and technology ,engineering.material ,Deformation (meteorology) ,021001 nanoscience & nanotechnology ,Microstructure ,01 natural sciences ,Crystallography ,chemistry.chemical_compound ,chemistry ,Mechanics of Materials ,Boride ,0103 physical sciences ,Materials Chemistry ,engineering ,Texture (crystalline) ,0210 nano-technology ,Boron - Abstract
In this work, the effect of pre-deformation in the β phase field on the microstructural characteristics of α phase in a Ti-40Al-8Nb-0.5B alloy (at. %) was investigated. The results showed that the morphology and crystallography of α phase were strongly influenced by the deformation. It was observed that if there was no deformation, α laths which formed strict Burgers orientation relationship with β matrix are predominant (∼81% in number fraction). In contrast, the Burgers α laths are significantly reduced after compression in the β phase field. Meanwhile, an abnormal double-fiber texture, and , is produced. After systematic analysis, we believe that the reduction of Burgers α is attributed to the heterogeneous nucleation of α phase at borides and the breakdown of the boride ribbons during deformation. Moreover, the formation of α texture is a synergetic consequence of β texture and boride texture.
- Published
- 2018