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- Title
Effect of Prior Deformation on the Formation of the Martensite Phase in Ti-6Al-4V Alloy.
- Authors
Chaithanya Kumar, K. N.; Babu, R. Prasath; Suresh, K. S.
- Abstract
The effect of prior deformation on the evolution of the martensite phase in Ti-6Al-4V alloy is reported by varying the hot-rolling temperature to have different stored energies. While the morphology of the martensite phase is greatly influenced by the prior deformation, the phase fraction is primarily dependent on the quenching temperature. The compositional deviation from the equilibrium condition, emerging from the differences in the diffusion of elements at different rolling temperatures, govern the nucleation and aspect ratio of the martensite laths. Higher stored energy in the deformed samples, calculated as the dislocation density, is found to derive the formation of a twinned plate martensite. Martensitic transformation, irrespective of the prior deformation condition, induces a strong variant selection based on the minimization of the transformation strain energy. However, a strong correlation between the morphology and the character of the intervariant boundaries of the martensite phase is established. The intervariant boundary distribution in martensite showed three major angle–axis pairs associated with the Burgers orientation relationship. The hardness of the martensite phase is determined by the solid solution strengthening, martensite morphology, and microstrain present in the sample.
- Subjects
MARTENSITE; MARTENSITIC transformations; SOLUTION strengthening; TITANIUM alloys; DEFORMATIONS (Mechanics); DISLOCATION density
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2022, Vol 74, Issue 11, p4081
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-022-05476-w