Modelling and design of stress-induced martensite formation in metastable β Ti alloys
Modelling and design of stress-induced martensite formation in metastable β Ti alloys
The temperature dependence of the stress-induced martensite (SIM) formation in a Ti-10V-2Fe-3Al (Ti-1023) alloy under compressive loading has been studied. At low temperatures, the stress level at which martensite starts to form increases linearly with the deformation temperature, while the stress at which the deformation switches to regular plastic deformation is roughly temperature independent. A thermostatistical model for dislocation evolution is employed to describe deformation twinning in martensite. Combined effects of twinning induced plasticity and solid solution strengthening are considered in terms of temperature variations. The SIM effect disappears on deformation at temperatures beyond ~ 233 ° C, which is close to the predicted Ms temperature of 240°C. The thermostatistical model predicts a transition from twinned martensite to pure slip at 250°C. By providing a model to predict the martensite formation, and by describing deformation twinning, the present work provides a number of tools that may be employed to conceive new titanium alloys combining improved strength and ductility.
Dislocations, High temperature deformation, Stress-induced martensite, Titanium alloys, Twinning
140-146
Neelakantan, Suresh
54f12c77-36a8-4bd0-8940-eb3657a5f750
Galindo-Nava, E.I.
55a2bf00-0903-414e-8ab6-e26d143a9af3
San Martin, David
3cb4e081-1f6f-4f63-a25f-30613c3288a1
Chao, Jesus
4d3ea93b-9085-45e6-81e1-f0f77ad8b2cd
Rivera-Díaz-del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
10 January 2014
Neelakantan, Suresh
54f12c77-36a8-4bd0-8940-eb3657a5f750
Galindo-Nava, E.I.
55a2bf00-0903-414e-8ab6-e26d143a9af3
San Martin, David
3cb4e081-1f6f-4f63-a25f-30613c3288a1
Chao, Jesus
4d3ea93b-9085-45e6-81e1-f0f77ad8b2cd
Rivera-Díaz-del-Castillo, P.E.J.
6e0abc1c-2aee-4a18-badc-bac28e7831e2
Neelakantan, Suresh, Galindo-Nava, E.I., San Martin, David, Chao, Jesus and Rivera-Díaz-del-Castillo, P.E.J.
(2014)
Modelling and design of stress-induced martensite formation in metastable β Ti alloys.
Materials Science and Engineering: A, 590, .
(doi:10.1016/j.msea.2013.10.003).
Abstract
The temperature dependence of the stress-induced martensite (SIM) formation in a Ti-10V-2Fe-3Al (Ti-1023) alloy under compressive loading has been studied. At low temperatures, the stress level at which martensite starts to form increases linearly with the deformation temperature, while the stress at which the deformation switches to regular plastic deformation is roughly temperature independent. A thermostatistical model for dislocation evolution is employed to describe deformation twinning in martensite. Combined effects of twinning induced plasticity and solid solution strengthening are considered in terms of temperature variations. The SIM effect disappears on deformation at temperatures beyond ~ 233 ° C, which is close to the predicted Ms temperature of 240°C. The thermostatistical model predicts a transition from twinned martensite to pure slip at 250°C. By providing a model to predict the martensite formation, and by describing deformation twinning, the present work provides a number of tools that may be employed to conceive new titanium alloys combining improved strength and ductility.
This record has no associated files available for download.
More information
Accepted/In Press date: 1 October 2013
e-pub ahead of print date: 11 October 2013
Published date: 10 January 2014
Keywords:
Dislocations, High temperature deformation, Stress-induced martensite, Titanium alloys, Twinning
Identifiers
Local EPrints ID: 492478
URI: http://eprints.soton.ac.uk/id/eprint/492478
ISSN: 0921-5093
PURE UUID: f318e262-0ad7-4a6c-b378-d1805febdb16
Catalogue record
Date deposited: 29 Jul 2024 17:00
Last modified: 30 Jul 2024 02:06
Export record
Altmetrics
Contributors
Author:
Suresh Neelakantan
Author:
E.I. Galindo-Nava
Author:
David San Martin
Author:
Jesus Chao
Author:
P.E.J. Rivera-Díaz-del-Castillo
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