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Softening Behavior of Ti6Al4V Alloy during Hot Deformation

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Abstract:

The effect of strain rate and strain on the hot compression behaviour of Ti6Al4V has been analysed to understand the microstructural evolution and restoration behaviour. Cylindrical samples with partially equiaxed grains were deformed in the α+β region at different thermo-mechanical conditions. EBSD has been used to study the microstructural behaviour and the restoration mechanisms. The microstructural evolution showed a complex restoration behaviour, where both fragmentation and nucleation of new grains have been observed. The volume fraction of the equiaxed grains increased with an increase in the strain, but oppositely decreased with the strain rate. At the same time the average grain size of the equiaxed grains decreased with an increase in both the strain and strain rate. The measured activation energy for deformation revealed a good agreement with reported values in the literature.

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Info:

Periodical:

Materials Science Forum (Volumes 828-829)

Pages:

407-412

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.828-829.407

Citation:

Cite this paper

Online since:

August 2015

Authors:

Paul Micheal Souza*, Hossein Beladi, Bernard F. Rolfe, Rajkumar Prasad Singh, Peter Hodgson

Keywords:

DRX, Flow Behavior, Hot Deformation, Ti6Al4V, Titanium

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* - Corresponding Author

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