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Numerical analysis of twin-precipitate interactions in magnesium alloys
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SYSNO ASEP 0533803 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Numerical analysis of twin-precipitate interactions in magnesium alloys Author(s) Šiška, Filip (UFM-A) RID, ORCID
Stratil, Luděk (UFM-A) ORCID
Čížek, Jan (UFP-V) ORCID
Guo, T. (AU)
Barnett, M. (AU)Number of authors 5 Source Title Acta Materialia. - : Elsevier - ISSN 1359-6454
Roč. 202, JAN (2021), s. 80-87Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords Magnesium alloy ; Twinning ; FEM ; Crystal plasticity Subject RIV JG - Metallurgy OECD category Materials engineering Subject RIV - cooperation Institute of Plasma Physics - Metallurgy R&D Projects GA18-07140S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFM-A - RVO:68081723 ; UFP-V - RVO:61389021 UT WOS 000599842800007 EID SCOPUS 85094899272 DOI 10.1016/j.actamat.2020.10.053 Annotation The present paper performs a two-dimensional numerical study of the interactions between {10
1¯
2} tensile twin and precipitates aligned along basal planes in magnesium alloys. The model consists of an elliptical twin placed in between two rectangular precipitates. Material behavior is modeled using anisotropic elasticity and crystal plasticity. The model represents the situation at the onset of twinning when twins are small and fit in between the precipitates. The results show that precipitates influence the shear stress necessary to accommodate twin by changing the slip critical resolved shear stress (CRSS) values and by acting as obstacles. Thin twins (aspect ratio <0.05) are influenced by both effects while thick twins (aspect ratio >0.1) are influenced by slip CRSS changes. The precipitate thickness plays a crucial role in twin thickening and propagation. Increasing precipitate thickness increases shear stress necessary to accommodate twin and also decreases stress beyond the precipitate which hinders sequential twin propagation.Workplace Institute of Physics of Materials Contact Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S135964542030851X?via%3Dihub
Number of the records: 1