Publication detail

Numerical analysis of twin thickening process in magnesium alloys

ŠIŠKA, F. STRATIL, L. ČÍŽEK, J. GHADERI, A. BARNETT, M.

English title

Numerical analysis of twin thickening process in magnesium alloys

Type

journal article in Web of Science

Language

en

Original abstract

A finite element study of the stress field evolution around the View the MathML source{101-2} tensile twin of different thickness in magnesium alloy is performed. The system is represented by the 2D models of one and three elastic elliptical inclusions with different aspect ratios surrounded by the plastic matrix. Anisotropic elasticity and crystal plasticity theory are used to describe the material behavior. Numerical results for single inclusion overestimate the initial stress for the stable twin aspect ratio by a factor of two compared to the experimental results. Multiple inclusions case obtains values closer to the experimental ones. Therefore it is concluded that the process of twin thickening cannot be solved within the analysis of the single inclusion and an interaction between twins in the same and neighboring grains plays a crucial role during the twin thickening process.

English abstract

A finite element study of the stress field evolution around the View the MathML source{101-2} tensile twin of different thickness in magnesium alloy is performed. The system is represented by the 2D models of one and three elastic elliptical inclusions with different aspect ratios surrounded by the plastic matrix. Anisotropic elasticity and crystal plasticity theory are used to describe the material behavior. Numerical results for single inclusion overestimate the initial stress for the stable twin aspect ratio by a factor of two compared to the experimental results. Multiple inclusions case obtains values closer to the experimental ones. Therefore it is concluded that the process of twin thickening cannot be solved within the analysis of the single inclusion and an interaction between twins in the same and neighboring grains plays a crucial role during the twin thickening process.

Keywords in English

Magnesium alloy; Twinning; FEM; Crystal plasticity

Released

01.02.2017

Publisher

Elsevier

Location

USA

ISSN

1359-6454

Volume

124

Number

1

Pages from–to

9–16

Pages count

8

BIBTEX


@article{BUT132336,
  author="Filip {Šiška} and Luděk {Stratil} and Jan {Čížek} and Alireza {Ghaderi} and Matthew {Barnett},
  title="Numerical analysis of twin thickening process in magnesium alloys",
  year="2017",
  volume="124",
  number="1",
  month="February",
  pages="9--16",
  publisher="Elsevier",
  address="USA",
  issn="1359-6454"
}