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Numerical analysis of twin thickening process in magnesium alloys
- 1.0480460 - ÚFM 2018 RIV GB eng J - Journal Article
Šiška, Filip - Stratil, Luděk - Čížek, J. - Ghaderi, A. - Barnett, M.
Numerical analysis of twin thickening process in magnesium alloys.
Acta Materialia. Roč. 124, FEB (2017), s. 9-16. ISSN 1359-6454. E-ISSN 1873-2453
R&D Projects: GA ČR GJ15-21292Y
Institutional support: RVO:68081723
Keywords : Magnesium alloy * Twinning * Crystal plasticity * FEM
OECD category: Materials engineering
Impact factor: 6.036, year: 2017
A finite element study of the stress field evolution around the {1012} 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.
Permanent Link: http://hdl.handle.net/11104/0276238
Number of the records: 1