Title
Dynamic shear localization in Ti6Al4V Dynamic shear localization in Ti6Al4V
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
conferenceObject
Publication
Subject
Physics
Source (journal)
Procedia Engineering
Source (book)
11th International Conference on the Mechanical Behavior of Materials, (ICM), 2011, Como, ITALY (ICM11)
Volume/pages
10(2011) , p. 1-6
ISSN
1877-7058
ISI
000300451302060
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The alloy Ti6Al4V is known to be prone to the formation of adiabatic shear bands when dynamically loaded in shear. This causes a catastrophic decrease of the load carrying capacity and is usually followed by fracture. Although, the main mechanism is recognized to be the competition between strain hardening and thermal softening, a detailed understanding of the role of microstructural plasticity mechanisms and macroscopic loading conditions does not exist yet. To study strain localization and shear fracture, different high strain rate shear tests have been carried out: compression of hat-shaped specimens, torsion of thin walled tubular specimens and in-plane shear tests. The value of the three techniques in studying shear localization is evaluated. Post-mortem analysis of the fracture surface and the materials' microstructure is performed with optical and electron microscopy. In all cases a ductile fracture is observed. SEM and TEM techniques are used to study the local microstructure and composition in the shear band and as such the driving mechanism for the ASB formation. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of ICM11
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