Effect of heat treatment on microstructure and microhardness evolution in a Ti–6Al–4V alloy processed by high-pressure torsion
Effect of heat treatment on microstructure and microhardness evolution in a Ti–6Al–4V alloy processed by high-pressure torsion
A Ti–6Al–4V alloy was heat-treated to give two types of microstructures with different volume fraction of equiaxed ? phase and lamellar (? + ?) microstructure. Disks were cut from the heat-treated rods and processed by quasi-constrained high-pressure torsion (HPT) at room temperature with an applied pressure of 6.0 GPa and torsional straining from 1/4 to 20 turns. The results show that there is a gradual evolution of homogeneity in microhardness and grain size with increasing numbers of revolutions in HPT such that the microhardness values attain a maximum constant value across the disk after processing by HPT for 10 turns and the measured equilibrium grain sizes after 20 turns are ~130 nm in Ti64-1 and ~70 in Ti64-2. The results show also that a larger fraction of lamellar (? + ?) in the microstructure of Ti–6Al–4V leads to a higher hardenability after processing by HPT.
4646-4652
Wang, Ying Chun
5c067a6f-de5d-4fcb-9b0d-80a42c3634b0
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
July 2013
Wang, Ying Chun
5c067a6f-de5d-4fcb-9b0d-80a42c3634b0
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Wang, Ying Chun and Langdon, Terence G.
(2013)
Effect of heat treatment on microstructure and microhardness evolution in a Ti–6Al–4V alloy processed by high-pressure torsion.
Journal of Materials Science, 48 (13), .
(doi:10.1007/s10853-012-7071-1).
Abstract
A Ti–6Al–4V alloy was heat-treated to give two types of microstructures with different volume fraction of equiaxed ? phase and lamellar (? + ?) microstructure. Disks were cut from the heat-treated rods and processed by quasi-constrained high-pressure torsion (HPT) at room temperature with an applied pressure of 6.0 GPa and torsional straining from 1/4 to 20 turns. The results show that there is a gradual evolution of homogeneity in microhardness and grain size with increasing numbers of revolutions in HPT such that the microhardness values attain a maximum constant value across the disk after processing by HPT for 10 turns and the measured equilibrium grain sizes after 20 turns are ~130 nm in Ti64-1 and ~70 in Ti64-2. The results show also that a larger fraction of lamellar (? + ?) in the microstructure of Ti–6Al–4V leads to a higher hardenability after processing by HPT.
This record has no associated files available for download.
More information
Published date: July 2013
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 351987
URI: http://eprints.soton.ac.uk/id/eprint/351987
ISSN: 0022-2461
PURE UUID: 74c7199f-8dec-412b-a0af-380affab77e6
Catalogue record
Date deposited: 01 May 2013 09:11
Last modified: 15 Mar 2024 03:13
Export record
Altmetrics
Contributors
Author:
Ying Chun Wang
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics
