Parent beta grain reconstruction of globularized Ti-6Al-4V alloy
In this study, a denoising method of smoothing spline is proposed to reconstruct parent β grain of titanium alloys as a supplement to the past literatures. The β mean orientation of the sample with bimodal microstructure can be well reconstructed with similar grain size and negligible misorientation...
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| Autores principales: | , , , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
Elsevier
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/ca7817fcb1644705a6e6274cc5a31419 |
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| Sumario: | In this study, a denoising method of smoothing spline is proposed to reconstruct parent β grain of titanium alloys as a supplement to the past literatures. The β mean orientation of the sample with bimodal microstructure can be well reconstructed with similar grain size and negligible misorientation (<1°) compared with traditional reconstruction result. The second test case deals with globularized α grains after multi-axial hot compression. Obvious β recrystallization happens inside the large prior β grain during deformation, which can facilitate the homogeneous globularization process. The mean orientation reconstruction of recrystallized β grain by smoothing spline is performed and further compared with the orientation calculated from one α colony by orientation-trace method. The maximum 20° misorientation exists due to the local orientation deviation inside both α and β grains during globularization processing. In addition, the globularization mechanism under multi-axial hot compression is analyzed. Despite the appearance of local heterogeneity between different α colonies, high globularized efficiency around 71.2% can be easily achieved by the multi-directional deformation. |
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