Slip band-grain boundary interactions in commercial-purity titanium
File(s)
Accepted version
Author(s)
Guo, Y
Britton, TB
Wilkinson, AJ
Type
Journal Article
Abstract
The interaction between slip bands and grain boundaries in commercial-purity titanium was examined using cross-correlation-based electron backscatter diffraction. At a low strain level, three types of interactions were observed: blocked slip band with stress concentration; slip transfer; and blocked slip band with no stress concentration. The stress concentration induced by the blocked slip band was fitted with Eshelby’s theoretical model, from which a Hall–Petch coefficient was deduced. It was found that the Hall–Petch coefficient varies with the individual grain boundary. We investigated the geometric alignment between the slip band and various slip systems to the neighbouring grain. Stress concentration can be induced by the blocked slip band if the slip system is poorly aligned with 〈a〉 prismatic, pyramidal or basal slip systems in the neighbouring grain. Transfer of slip across the boundary occurs when there is good alignment on 〈a〉 prismatic or 〈a〉 pyramidal slip systems. Other stress-relieving mechanisms are possible when the best alignment is not with the slip system that has the lower critical resolved shear stress.
Date Issued
2014-06-04
Date Acceptance
2014-05-06
Citation
Acta Materialia, 2014, 76, pp.1-12
ISSN
1873-2453
Publisher
Elsevier
Start Page
1
End Page
12
Journal / Book Title
Acta Materialia
Volume
76
Copyright Statement
© 2014, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Subjects
Science & Technology
Technology
Materials Science, Multidisciplinary
Metallurgy & Metallurgical Engineering
Materials Science
MATERIALS SCIENCE, MULTIDISCIPLINARY
METALLURGY & METALLURGICAL ENGINEERING
HR-EBSD
Slip transfer
Slip band
Hall-Petch coefficient
Titanium
ELECTRON BACKSCATTER DIFFRACTION
HALL-PETCH RELATION
ELASTIC STRAIN
DISLOCATION DISTRIBUTIONS
MECHANICAL-PROPERTIES
PLASTIC-DEFORMATION
INSITU DEFORMATION
LATTICE ROTATIONS
STRESS-FIELDS
METALS
Publication Status
Published