Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431)
This study describes the role of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431). The coarse-grained microstructure formed in the alloy after extrusion was compared with the bimodal grain size distribution observed in the alloy after additional annealing. The m...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421004221 |
| _version_ | 1819071882409803776 |
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| author | Anna Dobkowska Bogusława Adamczyk – Cieślak Dariusz Kuc Eugeniusz Hadasik Tomasz Płociński Ewa Ura-Bińczyk Jarosław Mizera |
| author_facet | Anna Dobkowska Bogusława Adamczyk – Cieślak Dariusz Kuc Eugeniusz Hadasik Tomasz Płociński Ewa Ura-Bińczyk Jarosław Mizera |
| author_sort | Anna Dobkowska |
| collection | DOAJ |
| description | This study describes the role of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431). The coarse-grained microstructure formed in the alloy after extrusion was compared with the bimodal grain size distribution observed in the alloy after additional annealing. The microstructure observations show that the extruded alloy, as well as the one after subsequent annealing, were composed of α(Mg), MgZn2, coarse AlMn-rich precipitations, and nanosized AlLi, Mg17Al12 and Li2MgAl. The annealing caused microstructure transformation and triggered anomalous and inhomogeneous grain growth of the alloy, which increased the ratio of cathodic grain interiors to anodic high-angle grain boundaries. This decreased the corrosion resistance of the annealed alloy in chloride-containing solution.The results of this work also show that the precipitations play only minor role in corrosion behavior of both alloys, and the major corrosion mechanism occurred between high-angle grain boundaries and grain interiors. |
| first_indexed | 2024-12-21T17:28:53Z |
| format | Article |
| id | doaj.art-35cf85ee104d4618a9398820f0eba4f3 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-21T17:28:53Z |
| publishDate | 2021-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-35cf85ee104d4618a9398820f0eba4f32022-12-21T18:55:58ZengElsevierJournal of Materials Research and Technology2238-78542021-07-0113346358Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431)Anna Dobkowska0Bogusława Adamczyk – Cieślak1Dariusz Kuc2Eugeniusz Hadasik3Tomasz Płociński4Ewa Ura-Bińczyk5Jarosław Mizera6Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St, Warsaw, 02-507, Poland; Corresponding author.Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St, Warsaw, 02-507, PolandInstitute of Materials Engineering, Silesian University of Technology, Krasinskiego 8, Katowice, 40- 019, PolandInstitute of Materials Engineering, Silesian University of Technology, Krasinskiego 8, Katowice, 40- 019, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St, Warsaw, 02-507, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St, Warsaw, 02-507, PolandFaculty of Materials Science and Engineering, Warsaw University of Technology, 141 Woloska St, Warsaw, 02-507, PolandThis study describes the role of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431). The coarse-grained microstructure formed in the alloy after extrusion was compared with the bimodal grain size distribution observed in the alloy after additional annealing. The microstructure observations show that the extruded alloy, as well as the one after subsequent annealing, were composed of α(Mg), MgZn2, coarse AlMn-rich precipitations, and nanosized AlLi, Mg17Al12 and Li2MgAl. The annealing caused microstructure transformation and triggered anomalous and inhomogeneous grain growth of the alloy, which increased the ratio of cathodic grain interiors to anodic high-angle grain boundaries. This decreased the corrosion resistance of the annealed alloy in chloride-containing solution.The results of this work also show that the precipitations play only minor role in corrosion behavior of both alloys, and the major corrosion mechanism occurred between high-angle grain boundaries and grain interiors.http://www.sciencedirect.com/science/article/pii/S2238785421004221Magnesium-lithium alloysBimodal grain size distributionCorrosion |
| spellingShingle | Anna Dobkowska Bogusława Adamczyk – Cieślak Dariusz Kuc Eugeniusz Hadasik Tomasz Płociński Ewa Ura-Bińczyk Jarosław Mizera Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431) Journal of Materials Research and Technology Magnesium-lithium alloys Bimodal grain size distribution Corrosion |
| title | Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431) |
| title_full | Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431) |
| title_fullStr | Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431) |
| title_full_unstemmed | Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431) |
| title_short | Influence of bimodal grain size distribution on the corrosion resistance of Mg–4Li–3Al–1Zn (LAZ431) |
| title_sort | influence of bimodal grain size distribution on the corrosion resistance of mg 4li 3al 1zn laz431 |
| topic | Magnesium-lithium alloys Bimodal grain size distribution Corrosion |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421004221 |
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