The effect of hot deformation parameters on microstructure evolution of the α-Phase in Ti-6Al-4V

Bama Perumal, Jeffery Brooks, Martin A Rist, Salih Gungor, Michael E. Fitzpatrick

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Abstract

The effect of high-temperature deformation and the influence of hot working parameters on microstructure evolution during isothermal hot forging of Ti-6Al-4V in the alpha phase field were investigated. A series of hot isothermal axis-symmetric compression tests were carried out at temperatures both low and high in the alpha stability field [(1153 K and 1223 K (880 °C and 950 °C), respectively], using three strain rates (0.01, 0.1 and 1.0/s) relevant to industrial press forging. The microstructures and orientation of the alpha laths were determined using optical microscopy and electron backscatter diffraction techniques. The experimental results show that there is a change in lath morphology of the secondary α phase under the influence of the deformation parameters, and that α lath thickness appears to have little influence on flow behavior.
Original languageEnglish
Pages (from-to)4128-36
Number of pages9
JournalMetallurgical and Materials Transactions A
Volume47
Issue number8
Early online date13 May 2016
DOIs
Publication statusPublished - Aug 2016

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