Cargando…
The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression
The influence of the matrix material on the deformation and failure mechanisms in metal matrix syntactic foams was investigated in this study. Samples with commercially pure Al (Al) and Al-12 wt % Si (AlSi12) eutectic aluminum matrix, reinforced by hollow ceramic spheres, were compressed at room tem...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459142/ https://www.ncbi.nlm.nih.gov/pubmed/28772556 http://dx.doi.org/10.3390/ma10020196 |
_version_ | 1783241913905709056 |
---|---|
author | Kádár, Csilla Máthis, Kristián Knapek, Michal Chmelík, František |
author_facet | Kádár, Csilla Máthis, Kristián Knapek, Michal Chmelík, František |
author_sort | Kádár, Csilla |
collection | PubMed |
description | The influence of the matrix material on the deformation and failure mechanisms in metal matrix syntactic foams was investigated in this study. Samples with commercially pure Al (Al) and Al-12 wt % Si (AlSi12) eutectic aluminum matrix, reinforced by hollow ceramic spheres, were compressed at room temperature. Concurrently, the acoustic emission response and the strain field development on the surface were monitored in-situ. The results indicate that the plastic deformation of the cell walls is the governing mechanism in the early stage of straining for both types of foams. At large stresses, deformation bands form both in the Al and AlSi12 foam. In Al foam, cell walls collapse in a large volume. In contrast, the AlSi12 foam is more brittle; therefore, the fracture of precipitates and the crushing of the matrix take place within a distinctive deformation band, along with an occurrence of a significant stress drop. The onset stress of ceramic sphere failure was shown to be not influenced by the matrix material. The in-situ methods provided complementary data which further support these results. |
format | Online Article Text |
id | pubmed-5459142 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54591422017-07-28 The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression Kádár, Csilla Máthis, Kristián Knapek, Michal Chmelík, František Materials (Basel) Article The influence of the matrix material on the deformation and failure mechanisms in metal matrix syntactic foams was investigated in this study. Samples with commercially pure Al (Al) and Al-12 wt % Si (AlSi12) eutectic aluminum matrix, reinforced by hollow ceramic spheres, were compressed at room temperature. Concurrently, the acoustic emission response and the strain field development on the surface were monitored in-situ. The results indicate that the plastic deformation of the cell walls is the governing mechanism in the early stage of straining for both types of foams. At large stresses, deformation bands form both in the Al and AlSi12 foam. In Al foam, cell walls collapse in a large volume. In contrast, the AlSi12 foam is more brittle; therefore, the fracture of precipitates and the crushing of the matrix take place within a distinctive deformation band, along with an occurrence of a significant stress drop. The onset stress of ceramic sphere failure was shown to be not influenced by the matrix material. The in-situ methods provided complementary data which further support these results. MDPI 2017-02-17 /pmc/articles/PMC5459142/ /pubmed/28772556 http://dx.doi.org/10.3390/ma10020196 Text en © 2017 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kádár, Csilla Máthis, Kristián Knapek, Michal Chmelík, František The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression |
title | The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression |
title_full | The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression |
title_fullStr | The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression |
title_full_unstemmed | The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression |
title_short | The Effect of Matrix Composition on the Deformation and Failure Mechanisms in Metal Matrix Syntactic Foams during Compression |
title_sort | effect of matrix composition on the deformation and failure mechanisms in metal matrix syntactic foams during compression |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5459142/ https://www.ncbi.nlm.nih.gov/pubmed/28772556 http://dx.doi.org/10.3390/ma10020196 |
work_keys_str_mv | AT kadarcsilla theeffectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT mathiskristian theeffectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT knapekmichal theeffectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT chmelikfrantisek theeffectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT kadarcsilla effectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT mathiskristian effectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT knapekmichal effectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression AT chmelikfrantisek effectofmatrixcompositiononthedeformationandfailuremechanismsinmetalmatrixsyntacticfoamsduringcompression |