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Dynamic properties of an ultrafine-grained Mg-Zn-Zr alloy

Orlov, Dmitry; Hockauf, Matthias; Meyer, Lothar W. and Estrin, Yuri (2013) In Philosophical Magazine Letters 93(9). p.541-549
Abstract

The effect of ultrafine-grained structure formation in Mg-Zn-Zr alloy ZK60 on its mechanical response was investigated at strain rates ranging from quasi-static to dynamic regimes. The study demonstrated that the strength characteristics of the material rise significantly with increasing strain rate, while its ductility is reduced. These effects are particularly pronounced in the dynamic loading regime, at strain rates in the (1-5) × 102 s-1 range. In the ultrafine-grained alloy ZK60, the energy absorption per unit volume, W, is enhanced by grain refinement by a factor as high as eight for the highest strain rate of 5 × 102 s-1 investigated. The analysis is focused on the microstructure... (More)

The effect of ultrafine-grained structure formation in Mg-Zn-Zr alloy ZK60 on its mechanical response was investigated at strain rates ranging from quasi-static to dynamic regimes. The study demonstrated that the strength characteristics of the material rise significantly with increasing strain rate, while its ductility is reduced. These effects are particularly pronounced in the dynamic loading regime, at strain rates in the (1-5) × 102 s-1 range. In the ultrafine-grained alloy ZK60, the energy absorption per unit volume, W, is enhanced by grain refinement by a factor as high as eight for the highest strain rate of 5 × 102 s-1 investigated. The analysis is focused on the microstructure features that bring about the observed improvement of the tensile characteristics, as well as the deformation and fracture modes prevalent at different strain rates. The results obtained contribute to the exploration and understanding of dynamic behaviour of magnesium alloys.

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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
dynamic properties, equal-channel angular pressing, extrusion, magnesium alloys, mechanical properties
in
Philosophical Magazine Letters
volume
93
issue
9
pages
9 pages
publisher
Taylor & Francis
external identifiers
  • scopus:84883554973
ISSN
0950-0839
DOI
10.1080/09500839.2013.817690
language
English
LU publication?
no
id
eeb6d0d0-e216-4d0a-9060-ac218bd13ded
date added to LUP
2016-06-20 15:34:25
date last changed
2018-04-01 04:23:50
@article{eeb6d0d0-e216-4d0a-9060-ac218bd13ded,
  abstract     = {<p>The effect of ultrafine-grained structure formation in Mg-Zn-Zr alloy ZK60 on its mechanical response was investigated at strain rates ranging from quasi-static to dynamic regimes. The study demonstrated that the strength characteristics of the material rise significantly with increasing strain rate, while its ductility is reduced. These effects are particularly pronounced in the dynamic loading regime, at strain rates in the (1-5) × 10<sup>2</sup> s<sup>-1</sup> range. In the ultrafine-grained alloy ZK60, the energy absorption per unit volume, W, is enhanced by grain refinement by a factor as high as eight for the highest strain rate of 5 × 10<sup>2</sup> s<sup>-1</sup> investigated. The analysis is focused on the microstructure features that bring about the observed improvement of the tensile characteristics, as well as the deformation and fracture modes prevalent at different strain rates. The results obtained contribute to the exploration and understanding of dynamic behaviour of magnesium alloys.</p>},
  author       = {Orlov, Dmitry and Hockauf, Matthias and Meyer, Lothar W. and Estrin, Yuri},
  issn         = {0950-0839},
  keyword      = {dynamic properties,equal-channel angular pressing,extrusion,magnesium alloys,mechanical properties},
  language     = {eng},
  month        = {09},
  number       = {9},
  pages        = {541--549},
  publisher    = {Taylor & Francis},
  series       = {Philosophical Magazine Letters},
  title        = {Dynamic properties of an ultrafine-grained Mg-Zn-Zr alloy},
  url          = {http://dx.doi.org/10.1080/09500839.2013.817690},
  volume       = {93},
  year         = {2013},
}