The role of β-titanium ligaments in the deformation of dual phase
titanium alloys
titanium alloys
Author(s)
Type
Journal Article
Abstract
Multiphase titanium alloys are critical materials in high value engineering
components, for instance in aero engines. Microstructural complexity is
exploited through interface engineering during mechanical processing to realise
significant improvements in fatigue and fracture resistance and strength. In
this work, we explore the role of select interfaces using in-situ
micromechanical testing with concurrent observations from high angular
resolution electron backscatter diffraction (HR-EBSD). Our results are
supported with post mortem transmission electron microscopy (TEM). Using
micro-pillar compression, we performed in-depth analysis of the role of select
{\beta}-titanium (body centred cubic) ligaments which separate neighbouring
{\alpha}-titanium (hexagonal close packed) regions and inhibit the dislocation
motion and impact strength during mechanical deformation. These results shed
light on the strengthening mechanisms and those that can lead to strain
localisation during fatigue and failure.
components, for instance in aero engines. Microstructural complexity is
exploited through interface engineering during mechanical processing to realise
significant improvements in fatigue and fracture resistance and strength. In
this work, we explore the role of select interfaces using in-situ
micromechanical testing with concurrent observations from high angular
resolution electron backscatter diffraction (HR-EBSD). Our results are
supported with post mortem transmission electron microscopy (TEM). Using
micro-pillar compression, we performed in-depth analysis of the role of select
{\beta}-titanium (body centred cubic) ligaments which separate neighbouring
{\alpha}-titanium (hexagonal close packed) regions and inhibit the dislocation
motion and impact strength during mechanical deformation. These results shed
light on the strengthening mechanisms and those that can lead to strain
localisation during fatigue and failure.
Date Issued
2019-02-11
Date Acceptance
2019-01-09
Citation
Materials Science and Engineering: A, 2019, 746, pp.394-405
ISSN
0921-5093
Publisher
Elsevier
Start Page
394
End Page
405
Journal / Book Title
Materials Science and Engineering: A
Volume
746
Copyright Statement
© 2019 Elsevier B.V. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/
Sponsor
Engineering & Physical Science Research Council (EPSRC)
Royal Academy Of Engineering
Identifier
http://arxiv.org/abs/1812.07250v1
Grant Number
EP/K034332/1
RF/129
Subjects
cond-mat.mtrl-sci
cond-mat.mtrl-sci
Notes
as submitted version
Publication Status
Published
Date Publish Online
2019-01-11