$Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites$
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Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites

This paper takes nano-SiCp/Al–7Si matrix composites prepared by powder metallurgy as the research object. With the help of advanced microstructure characterization techniques and performance analysis methods, the effect of nano-SiCp volume fraction on the microstructure and properties of composites...

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Autores principales:	Dong Xuedan, Wang Aiqin, Xie Jingpei, Wang Zhen
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	nano-sicp/al–7si composites volume fraction microstructure performance Technology T Chemical technology TP1-1185 Physical and theoretical chemistry QD450-801
Acceso en línea:	https://doaj.org/article/66d490d344224adb9df183a72ac77785
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spelling	oai:doaj.org-article:66d490d344224adb9df183a72ac777852021-12-05T14:10:58ZOptimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites2191-909710.1515/ntrev-2021-0088https://doaj.org/article/66d490d344224adb9df183a72ac777852021-09-01T00:00:00Zhttps://doi.org/10.1515/ntrev-2021-0088https://doaj.org/toc/2191-9097This paper takes nano-SiCp/Al–7Si matrix composites prepared by powder metallurgy as the research object. With the help of advanced microstructure characterization techniques and performance analysis methods, the effect of nano-SiCp volume fraction on the microstructure and properties of composites is systematically studied. Based on optimizing the volume fraction of nano-SiCp, the thermal deformation behavior of the composites is investigated. It was found that with an increase of nano-SiCp content, the distribution uniformity of nano-SiCp decreases gradually. And because the surface of nano-SiCp is easy to adsorb gas and the aggregated distribution of nano-SiCp is not conducive to the sintering process, the density of the composites shows a gradually decreasing trend. The hardness of the composites tends increasing gradually, and the increase in amplitude gradually decreases. Due to the addition of nano-SiCp, there are many interfaces between SiCp and Al matrix, and cracks are prone to initiation and expansion at the interface. Therefore, as the volume fraction of nano-SiCp increases, the elongation of nano-SiCp/Al–7Si composites gradually decreases. When the volume fraction of nano-SiCp is 2%, the strength of the composites reaches the maximum value of 217 MPa. Compared with the Al–Si alloy without adding nano-SiCp, the results increased by 37.3%. In addition, with the decrease of strain rate and the increase of deformation temperature, the dislocation density in the composites gradually decreases, and the dynamic softening progresses more fully. The dynamic recrystallization nucleation mechanism mainly includes the subcrystal merging mechanism and the grain boundary bowing mechanism.Dong XuedanWang AiqinXie JingpeiWang ZhenDe Gruyterarticlenano-sicp/al–7si compositesvolume fractionmicrostructureperformanceTechnologyTChemical technologyTP1-1185Physical and theoretical chemistryQD450-801ENNanotechnology Reviews, Vol 10, Iss 1, Pp 1306-1317 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	nano-sicp/al–7si composites volume fraction microstructure performance Technology T Chemical technology TP1-1185 Physical and theoretical chemistry QD450-801
spellingShingle	nano-sicp/al–7si composites volume fraction microstructure performance Technology T Chemical technology TP1-1185 Physical and theoretical chemistry QD450-801 Dong Xuedan Wang Aiqin Xie Jingpei Wang Zhen Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites
description	This paper takes nano-SiCp/Al–7Si matrix composites prepared by powder metallurgy as the research object. With the help of advanced microstructure characterization techniques and performance analysis methods, the effect of nano-SiCp volume fraction on the microstructure and properties of composites is systematically studied. Based on optimizing the volume fraction of nano-SiCp, the thermal deformation behavior of the composites is investigated. It was found that with an increase of nano-SiCp content, the distribution uniformity of nano-SiCp decreases gradually. And because the surface of nano-SiCp is easy to adsorb gas and the aggregated distribution of nano-SiCp is not conducive to the sintering process, the density of the composites shows a gradually decreasing trend. The hardness of the composites tends increasing gradually, and the increase in amplitude gradually decreases. Due to the addition of nano-SiCp, there are many interfaces between SiCp and Al matrix, and cracks are prone to initiation and expansion at the interface. Therefore, as the volume fraction of nano-SiCp increases, the elongation of nano-SiCp/Al–7Si composites gradually decreases. When the volume fraction of nano-SiCp is 2%, the strength of the composites reaches the maximum value of 217 MPa. Compared with the Al–Si alloy without adding nano-SiCp, the results increased by 37.3%. In addition, with the decrease of strain rate and the increase of deformation temperature, the dislocation density in the composites gradually decreases, and the dynamic softening progresses more fully. The dynamic recrystallization nucleation mechanism mainly includes the subcrystal merging mechanism and the grain boundary bowing mechanism.
format	article
author	Dong Xuedan Wang Aiqin Xie Jingpei Wang Zhen
author_facet	Dong Xuedan Wang Aiqin Xie Jingpei Wang Zhen
author_sort	Dong Xuedan
title	Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites
title_short	Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites
title_full	Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites
title_fullStr	Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites
title_full_unstemmed	Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites
title_sort	optimization of volume fraction and microstructure evolution during thermal deformation of nano-sicp/al–7si composites
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/66d490d344224adb9df183a72ac77785
work_keys_str_mv	AT dongxuedan optimizationofvolumefractionandmicrostructureevolutionduringthermaldeformationofnanosicpal7sicomposites AT wangaiqin optimizationofvolumefractionandmicrostructureevolutionduringthermaldeformationofnanosicpal7sicomposites AT xiejingpei optimizationofvolumefractionandmicrostructureevolutionduringthermaldeformationofnanosicpal7sicomposites AT wangzhen optimizationofvolumefractionandmicrostructureevolutionduringthermaldeformationofnanosicpal7sicomposites
_version_	1718371539631472640

Optimization of volume fraction and microstructure evolution during thermal deformation of nano-SiCp/Al–7Si composites

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