TY - GEN
T1 - Microstructure and local mechanical property evolution during high strain-rate deformation of tantalum
AU - Vachhani, Shraddha J.
AU - Mara, Nathan
AU - Livescu, Veronica
AU - Cerreta, Ellen
N1 - Publisher Copyright:
© 2015 Owned by the authors, published by EDP Sciences.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015/9/7
Y1 - 2015/9/7
N2 - Shear localization is often a failure mechanism in materials subjected to high strain rate deformation. It is generally accepted that the microstructure evolution during deformation and the resulting heterogeneities strongly influence the development of these shear bands. Information regarding the development of local mechanical heterogeneities during deformation is difficult to characterize and as such, constitute is a critical missing piece in current crystal plasticity models. With the recent advances in spherical nanoindentation data analysis, there is now an unprecedented opportunity to obtain insights into the change in local mechanical properties during deformation in materials at sub-micron length scales. In this work, we quantify the evolution of microstructure and local mechanical properties in tantalum under dynamic loading conditions (split Hopkinson pressure bar), to capture the structure-property correlations at the sub-micron length scale. Relevant information is obtained by combining local mechanical property information captured using spherical nanoindentation with complimentary structure information at the indentation site measured using EBSD. The aim is to gain insight into the role of these microstructural features during macroscopic deformation, particularly their influence on the development of mechanical heterogeneities that lead to failure.
AB - Shear localization is often a failure mechanism in materials subjected to high strain rate deformation. It is generally accepted that the microstructure evolution during deformation and the resulting heterogeneities strongly influence the development of these shear bands. Information regarding the development of local mechanical heterogeneities during deformation is difficult to characterize and as such, constitute is a critical missing piece in current crystal plasticity models. With the recent advances in spherical nanoindentation data analysis, there is now an unprecedented opportunity to obtain insights into the change in local mechanical properties during deformation in materials at sub-micron length scales. In this work, we quantify the evolution of microstructure and local mechanical properties in tantalum under dynamic loading conditions (split Hopkinson pressure bar), to capture the structure-property correlations at the sub-micron length scale. Relevant information is obtained by combining local mechanical property information captured using spherical nanoindentation with complimentary structure information at the indentation site measured using EBSD. The aim is to gain insight into the role of these microstructural features during macroscopic deformation, particularly their influence on the development of mechanical heterogeneities that lead to failure.
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U2 - 10.1051/epjconf/20159402023
DO - 10.1051/epjconf/20159402023
M3 - Conference contribution
AN - SCOPUS:84952329835
T3 - EPJ Web of Conferences
BT - DYMAT 2015 - 11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading
A2 - Cadoni, Ezio
PB - EDP Sciences
T2 - 11th International Conference on the Mechanical and Physical Behaviour of Materials Under Dynamic Loading, DYMAT 2015
Y2 - 7 September 2015 through 11 September 2015
ER -