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Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization

This paper employs an innovative investigation approach to study pore evolution in Al-Si-Mg-Cu alloy within aluminum foam sandwiches (AFS) by integrating data from heating–expansion ratio curves, in situ observation of synchronous radiation, and microscopic analysis of the matrix’s microstructure at...

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Detalles Bibliográficos
Autores principales: Sun, Xi, Jian, Zhiqian, Su, Xixi, Huang, Peng, Gao, Qiang, Feng, Zhanhao, Zu, Guoyin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573979/
https://www.ncbi.nlm.nih.gov/pubmed/37834616
http://dx.doi.org/10.3390/ma16196479
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author Sun, Xi
Jian, Zhiqian
Su, Xixi
Huang, Peng
Gao, Qiang
Feng, Zhanhao
Zu, Guoyin
author_facet Sun, Xi
Jian, Zhiqian
Su, Xixi
Huang, Peng
Gao, Qiang
Feng, Zhanhao
Zu, Guoyin
author_sort Sun, Xi
collection PubMed
description This paper employs an innovative investigation approach to study pore evolution in Al-Si-Mg-Cu alloy within aluminum foam sandwiches (AFS) by integrating data from heating–expansion ratio curves, in situ observation of synchronous radiation, and microscopic analysis of the matrix’s microstructure at different stages. Additionally, the cavity design and plate type control for large-scale AFS production are explored. Findings categorize the precursor heating into three stages: rapid heating, solid–liquid transition, and stable foaming. During solid–liquid transition, the expansion rate experiences a sudden drop, associated with pore nucleation and edge cracking of precursors. Pores nucleate as elongated crack-like structures along the rolling direction, guided by the Mg-enriched regions. In stable foaming, these pores evolve, become spherical, and the matrix rapidly expands. Using square tubes for sealing on the preform cavity sides creates a dense edge zone during rolling, halting crack propagation into the powder core. Adopting edge sealing during foaming mitigates boundary effects, thereby improving AFS panel flatness.
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spelling pubmed-105739792023-10-14 Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization Sun, Xi Jian, Zhiqian Su, Xixi Huang, Peng Gao, Qiang Feng, Zhanhao Zu, Guoyin Materials (Basel) Article This paper employs an innovative investigation approach to study pore evolution in Al-Si-Mg-Cu alloy within aluminum foam sandwiches (AFS) by integrating data from heating–expansion ratio curves, in situ observation of synchronous radiation, and microscopic analysis of the matrix’s microstructure at different stages. Additionally, the cavity design and plate type control for large-scale AFS production are explored. Findings categorize the precursor heating into three stages: rapid heating, solid–liquid transition, and stable foaming. During solid–liquid transition, the expansion rate experiences a sudden drop, associated with pore nucleation and edge cracking of precursors. Pores nucleate as elongated crack-like structures along the rolling direction, guided by the Mg-enriched regions. In stable foaming, these pores evolve, become spherical, and the matrix rapidly expands. Using square tubes for sealing on the preform cavity sides creates a dense edge zone during rolling, halting crack propagation into the powder core. Adopting edge sealing during foaming mitigates boundary effects, thereby improving AFS panel flatness. MDPI 2023-09-29 /pmc/articles/PMC10573979/ /pubmed/37834616 http://dx.doi.org/10.3390/ma16196479 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
Sun, Xi
Jian, Zhiqian
Su, Xixi
Huang, Peng
Gao, Qiang
Feng, Zhanhao
Zu, Guoyin
Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization
title Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization
title_full Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization
title_fullStr Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization
title_full_unstemmed Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization
title_short Aluminum Foam Sandwich: Pore Evolution Mechanism Investigation and Engineering Preparing Optimization
title_sort aluminum foam sandwich: pore evolution mechanism investigation and engineering preparing optimization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10573979/
https://www.ncbi.nlm.nih.gov/pubmed/37834616
http://dx.doi.org/10.3390/ma16196479
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