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On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures
7xxx aluminium series reach exceptional strength compared to other industrial aluminium alloys. However, 7xxx aluminium series usually exhibit Precipitate-Free Zones (PFZs) along grain boundaries, which favour intergranular fracture and low ductility. In this study, the competition between intergran...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10221252/ https://www.ncbi.nlm.nih.gov/pubmed/37241397 http://dx.doi.org/10.3390/ma16103770 |
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author | Han, Sutao Lezaack, Matthieu B. Pyka, Grzegorz Netto, Nelson Simar, Aude Wahab, Magd Abdel Hannard, Florent |
author_facet | Han, Sutao Lezaack, Matthieu B. Pyka, Grzegorz Netto, Nelson Simar, Aude Wahab, Magd Abdel Hannard, Florent |
author_sort | Han, Sutao |
collection | PubMed |
description | 7xxx aluminium series reach exceptional strength compared to other industrial aluminium alloys. However, 7xxx aluminium series usually exhibit Precipitate-Free Zones (PFZs) along grain boundaries, which favour intergranular fracture and low ductility. In this study, the competition between intergranular and transgranular fracture is experimentally investigated in the 7075 Al alloy. This is of critical importance since it directly affects the formability and crashworthiness of thin Al sheets. Using Friction Stir Processing (FSP), microstructures with similar hardening precipitates and PFZs, but with very different grain structures and intermetallic (IM) particle size distribution, were generated and studied. Experimental results showed that the effect of microstructure on the failure mode was significantly different for tensile ductility compared to bending formability. While the tensile ductility was significantly improved for the microstructure with equiaxed grains and smaller IM particles (compared to elongated grains and larger particles), the opposite trend was observed in terms of formability. |
format | Online Article Text |
id | pubmed-10221252 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102212522023-05-28 On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures Han, Sutao Lezaack, Matthieu B. Pyka, Grzegorz Netto, Nelson Simar, Aude Wahab, Magd Abdel Hannard, Florent Materials (Basel) Article 7xxx aluminium series reach exceptional strength compared to other industrial aluminium alloys. However, 7xxx aluminium series usually exhibit Precipitate-Free Zones (PFZs) along grain boundaries, which favour intergranular fracture and low ductility. In this study, the competition between intergranular and transgranular fracture is experimentally investigated in the 7075 Al alloy. This is of critical importance since it directly affects the formability and crashworthiness of thin Al sheets. Using Friction Stir Processing (FSP), microstructures with similar hardening precipitates and PFZs, but with very different grain structures and intermetallic (IM) particle size distribution, were generated and studied. Experimental results showed that the effect of microstructure on the failure mode was significantly different for tensile ductility compared to bending formability. While the tensile ductility was significantly improved for the microstructure with equiaxed grains and smaller IM particles (compared to elongated grains and larger particles), the opposite trend was observed in terms of formability. MDPI 2023-05-16 /pmc/articles/PMC10221252/ /pubmed/37241397 http://dx.doi.org/10.3390/ma16103770 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Han, Sutao Lezaack, Matthieu B. Pyka, Grzegorz Netto, Nelson Simar, Aude Wahab, Magd Abdel Hannard, Florent On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures |
title | On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures |
title_full | On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures |
title_fullStr | On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures |
title_full_unstemmed | On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures |
title_short | On the Competition between Intergranular and Transgranular Failure within 7xxx Al Alloys with Tailored Microstructures |
title_sort | on the competition between intergranular and transgranular failure within 7xxx al alloys with tailored microstructures |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10221252/ https://www.ncbi.nlm.nih.gov/pubmed/37241397 http://dx.doi.org/10.3390/ma16103770 |
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