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Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite

The influence of Sr additions on the microstructure of primary and eutectic Mg2Si phases, wear and corrosion behaviour of Al–Mg2Si–Cu in-situ composite was investigated. The results showed that addition of 0.01 wt% Sr modified the primary Mg2Si morphology but exceeding this level of Sr induced a los...

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Main Authors:	Farahany, S., Ghandvar, H., Bozorg, M., Nordin, A., Ourdjini, A., Hamzah, E.
Format:	Article
Language:	English
Published:	Elsevier Ltd. 2020
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/86290/1/SaeedFarahany2020_RoleofSronMicrostructureMechanicalProperties.pdf http://eprints.utm.my/id/eprint/86290/ https://dx.doi.org/10.1016/j.matchemphys.2019.121954
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spelling	my.utm.862902020-10-13T01:44:35Z http://eprints.utm.my/id/eprint/86290/ Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite Farahany, S. Ghandvar, H. Bozorg, M. Nordin, A. Ourdjini, A. Hamzah, E. TJ Mechanical engineering and machinery The influence of Sr additions on the microstructure of primary and eutectic Mg2Si phases, wear and corrosion behaviour of Al–Mg2Si–Cu in-situ composite was investigated. The results showed that addition of 0.01 wt% Sr modified the primary Mg2Si morphology but exceeding this level of Sr induced a loss of modification as the primary phase morphology coarsened again. The Al–Mg2Si eutectic phase, on the other hand, still exhibited a refined structure even with higher levels of Sr additions. Thermal analysis results revealed that both modification of the primary Mg2Si and refinement of the eutectic Mg2Si are most likely related to nucleation and growth stages respectively. The results of 0.01 wt% Sr addition showed that the mean size and mean aspect ratio decreased by about 30% and 6% respectively, but the mean density increased by 185% respectively. The highest UTS, El%, impact toughness and hardness were measured at 101.57 MPa, 1.1%, 1.31 J and 81 VHN respectively. Fractography of tensile and impact specimens from the Sr-treated composite revealed that Mg2Si particles suffered cracking with few decohesion indicating higher ductility. The results of wear testing also showed that composites treated with Sr have higher wear resistance compared with those of without Sr. The highest resistance to wear was observed in the composite containing 0.01 wt %Sr which is likely the result of good dispersion of fine Mg2Si particles in the Al matrix. This fine morphology and uniform distribution of Mg2Si particles also contributed to better corrosion resistance by reducing the propagation of corrosion pits. Elsevier Ltd. 2020-01 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/86290/1/SaeedFarahany2020_RoleofSronMicrostructureMechanicalProperties.pdf Farahany, S. and Ghandvar, H. and Bozorg, M. and Nordin, A. and Ourdjini, A. and Hamzah, E. (2020) Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite. Materials Chemistry and Physics, 239 . ISSN 0254-0584 https://dx.doi.org/10.1016/j.matchemphys.2019.121954 DOI:10.1016/j.matchemphys.2019.121954
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Farahany, S. Ghandvar, H. Bozorg, M. Nordin, A. Ourdjini, A. Hamzah, E. Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
description	The influence of Sr additions on the microstructure of primary and eutectic Mg2Si phases, wear and corrosion behaviour of Al–Mg2Si–Cu in-situ composite was investigated. The results showed that addition of 0.01 wt% Sr modified the primary Mg2Si morphology but exceeding this level of Sr induced a loss of modification as the primary phase morphology coarsened again. The Al–Mg2Si eutectic phase, on the other hand, still exhibited a refined structure even with higher levels of Sr additions. Thermal analysis results revealed that both modification of the primary Mg2Si and refinement of the eutectic Mg2Si are most likely related to nucleation and growth stages respectively. The results of 0.01 wt% Sr addition showed that the mean size and mean aspect ratio decreased by about 30% and 6% respectively, but the mean density increased by 185% respectively. The highest UTS, El%, impact toughness and hardness were measured at 101.57 MPa, 1.1%, 1.31 J and 81 VHN respectively. Fractography of tensile and impact specimens from the Sr-treated composite revealed that Mg2Si particles suffered cracking with few decohesion indicating higher ductility. The results of wear testing also showed that composites treated with Sr have higher wear resistance compared with those of without Sr. The highest resistance to wear was observed in the composite containing 0.01 wt %Sr which is likely the result of good dispersion of fine Mg2Si particles in the Al matrix. This fine morphology and uniform distribution of Mg2Si particles also contributed to better corrosion resistance by reducing the propagation of corrosion pits.
format	Article
author	Farahany, S. Ghandvar, H. Bozorg, M. Nordin, A. Ourdjini, A. Hamzah, E.
author_facet	Farahany, S. Ghandvar, H. Bozorg, M. Nordin, A. Ourdjini, A. Hamzah, E.
author_sort	Farahany, S.
title	Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
title_short	Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
title_full	Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
title_fullStr	Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
title_full_unstemmed	Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
title_sort	role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite
publisher	Elsevier Ltd.
publishDate	2020
url	http://eprints.utm.my/id/eprint/86290/1/SaeedFarahany2020_RoleofSronMicrostructureMechanicalProperties.pdf http://eprints.utm.my/id/eprint/86290/ https://dx.doi.org/10.1016/j.matchemphys.2019.121954
_version_	1681489479297138688
score	13.211869

Role of sr on microstructure, mechanical properties, wear and corrosion behaviour of an al-mg2si-cu in-situ composite

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