| Autor: |
Meng, Z.C., Zhang, J.H., Li, D., Guo, H., Wang, H., Xu, D.S., Zhao, Z.B., Wang, Q.J., Yang, R. |
| Předmět: |
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| Zdroj: |
Journal of Materials Science & Technology; Sep2024, Vol. 194, p138-141, 4p |
| Abstrakt: |
• The formation mechanism of high symmetry three-fold twins in titanium was investigated with molecular dynamics simulation. • The interaction energies between α variants demonstrate the three-fold twins possess the lowest elastic interaction energy by phase field method. • The substitutional energies of Al atoms near the screw dislocation elucidate the intragranular nucleation of the α phase without the generation of grain boundary α phase. The formation mechanism of three-fold twins during β to α phase transformation in titanium was investigated. Such twins were found to form by three α variants with the { 10 1 ‾ 1 } α twin relationship. Three-fold twins have the lowest elastic interaction energy and are favored by the existence of screw dislocations. The present result reveals the stress and defect origins of three-fold twins and provides theoretical support for obtaining the microstructure containing intensive three-fold twins with high symmetry through stress-induced and dislocation-mediated α phase nucleation in titanium alloys. [Display omitted] [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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