Effect of postprocessing thermal treatments on electron‐beam powder bed–fused Ti6Al4V
Effect of postprocessing thermal treatments on electron‐beam powder bed–fused Ti6Al4V
Electron-beam powder-bed-fusion additive manufacturing was used to build Ti6Al4V blocks. Postfabrication thermal treatments were applied to modify the mechanical properties. The postfabrication treatments included hot isostatic pressing and solution treatment and ageing. The microstructure and mechanical properties of the as-built and postthermally treated material were characterised. The postfabrication treatments were found to be effective in homogenising the microstructure and reducing the number of defects/pores, which improved the material Charpy impact toughness and fatigue life with some reduction in the material's strength. Based on the present results, as well as data from previous literature studies, the reduction in material strength after the postthermal treatment is likely to be caused by the combined effect of α-lath coarsening and the low oxygen content of the powder feedstock.
Soundarapandiyan, Gowtham
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Khan, Raja
77a36028-2670-4528-8beb-dbf1386068c6
Johnston, Carol
02f22821-0749-44e0-8b63-30f7a326634d
Chen, Bo
be54a9a8-da2a-4e6f-ae0e-0b076be87daf
Fitzpatrick, Michael
f0f38563-0e99-45c1-9699-e4c488d15172
3 March 2020
Soundarapandiyan, Gowtham
aabc8657-3836-4f55-a54b-353681cd3112
Khan, Raja
77a36028-2670-4528-8beb-dbf1386068c6
Johnston, Carol
02f22821-0749-44e0-8b63-30f7a326634d
Chen, Bo
be54a9a8-da2a-4e6f-ae0e-0b076be87daf
Fitzpatrick, Michael
f0f38563-0e99-45c1-9699-e4c488d15172
Soundarapandiyan, Gowtham, Khan, Raja, Johnston, Carol, Chen, Bo and Fitzpatrick, Michael
(2020)
Effect of postprocessing thermal treatments on electron‐beam powder bed–fused Ti6Al4V.
Material Design & Processing Communications, 3 (3), [e168].
(doi:10.1002/mdp2.168).
Abstract
Electron-beam powder-bed-fusion additive manufacturing was used to build Ti6Al4V blocks. Postfabrication thermal treatments were applied to modify the mechanical properties. The postfabrication treatments included hot isostatic pressing and solution treatment and ageing. The microstructure and mechanical properties of the as-built and postthermally treated material were characterised. The postfabrication treatments were found to be effective in homogenising the microstructure and reducing the number of defects/pores, which improved the material Charpy impact toughness and fatigue life with some reduction in the material's strength. Based on the present results, as well as data from previous literature studies, the reduction in material strength after the postthermal treatment is likely to be caused by the combined effect of α-lath coarsening and the low oxygen content of the powder feedstock.
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Accepted/In Press date: 24 February 2020
e-pub ahead of print date: 26 February 2020
Published date: 3 March 2020
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Local EPrints ID: 489860
URI: http://eprints.soton.ac.uk/id/eprint/489860
PURE UUID: ebdf57cf-2a0a-4c7e-8e0f-5cdff8189c39
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Date deposited: 03 May 2024 16:58
Last modified: 04 May 2024 02:09
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Author:
Gowtham Soundarapandiyan
Author:
Raja Khan
Author:
Carol Johnston
Author:
Bo Chen
Author:
Michael Fitzpatrick
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