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On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification

H.R. Kotadia, M. Qian, D.G. Eskin, Amit Das Orcid Logo

Materials & Design, Volume: 132, Pages: 266 - 274

Swansea University Author: Amit Das Orcid Logo

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DOI (Published version): 10.1016/j.matdes.2017.06.065

Abstract

Physical grain refinement is examined under high-intensity ultrasonication during solidification in commercial purity Al (CP-Al) and binary Al-10 wt% Cu alloy melts cooled naturally in air and compared against chemical inoculation using Al-5Ti-1B grain refiner. The coarse dendritic unrefined base mi...

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Published in: Materials & Design
ISSN: 0264-1275
Published: 2017
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URI: https://cronfa.swan.ac.uk/Record/cronfa34522
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first_indexed 2017-06-29T14:24:50Z
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spelling 2020-12-17T16:14:15.9462181 v2 34522 2017-06-29 On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification 4d785df766daed9a857c934bb130ed8b 0000-0002-7196-6254 Amit Das Amit Das true false 2017-06-29 MTLS Physical grain refinement is examined under high-intensity ultrasonication during solidification in commercial purity Al (CP-Al) and binary Al-10 wt% Cu alloy melts cooled naturally in air and compared against chemical inoculation using Al-5Ti-1B grain refiner. The coarse dendritic unrefined base microstructure was completely replaced with a fine equiaxed grain structure in the case of either inoculation or ultrasonication. However, ultrasonication produced more effective refinement over chemical inoculation with a two-fold and eight-fold increase in the grain density in CP-Al and Al-10%Cu alloy, respectively. While combining chemical inoculation with ultrasonication produced the finest grain structure in CP-Al, no further improvement over ultrasonication was noted for the Al-10%Cu alloy. Noticeable reduction in nucleation undercooling, of similar magnitude to chemical inoculation, was observed under ultrasonication. Cooling curve observations indicate strongly enhanced heterogeneous nucleation under ultrasonication. It appears that although chemical inoculation utilises higher potency nucleants, more nucleation events are favoured under cavitation. Journal Article Materials & Design 132 266 274 0264-1275 Grain refining; Ultrasound; Cavitation; Al-Ti-B refiner; Aluminium alloys; Solidification microstructure 15 10 2017 2017-10-15 10.1016/j.matdes.2017.06.065 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-12-17T16:14:15.9462181 2017-06-29T11:53:26.2925255 Faculty of Science and Engineering School of Engineering and Applied Sciences - Materials Science and Engineering H.R. Kotadia 1 M. Qian 2 D.G. Eskin 3 Amit Das 0000-0002-7196-6254 4 0034522-29062017115524.pdf kotadia2017.pdf 2017-06-29T11:55:24.4800000 Output 2340290 application/pdf Accepted Manuscript true 2018-06-29T00:00:00.0000000 true eng
title On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
spellingShingle On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
Amit Das
title_short On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
title_full On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
title_fullStr On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
title_full_unstemmed On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
title_sort On the microstructural refinement in commercial purity Al and Al-10 wt% Cu alloy under ultrasonication during solidification
author_id_str_mv 4d785df766daed9a857c934bb130ed8b
author_id_fullname_str_mv 4d785df766daed9a857c934bb130ed8b_***_Amit Das
author Amit Das
author2 H.R. Kotadia
M. Qian
D.G. Eskin
Amit Das
format Journal article
container_title Materials & Design
container_volume 132
container_start_page 266
publishDate 2017
institution Swansea University
issn 0264-1275
doi_str_mv 10.1016/j.matdes.2017.06.065
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Materials Science and Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Materials Science and Engineering
document_store_str 1
active_str 0
description Physical grain refinement is examined under high-intensity ultrasonication during solidification in commercial purity Al (CP-Al) and binary Al-10 wt% Cu alloy melts cooled naturally in air and compared against chemical inoculation using Al-5Ti-1B grain refiner. The coarse dendritic unrefined base microstructure was completely replaced with a fine equiaxed grain structure in the case of either inoculation or ultrasonication. However, ultrasonication produced more effective refinement over chemical inoculation with a two-fold and eight-fold increase in the grain density in CP-Al and Al-10%Cu alloy, respectively. While combining chemical inoculation with ultrasonication produced the finest grain structure in CP-Al, no further improvement over ultrasonication was noted for the Al-10%Cu alloy. Noticeable reduction in nucleation undercooling, of similar magnitude to chemical inoculation, was observed under ultrasonication. Cooling curve observations indicate strongly enhanced heterogeneous nucleation under ultrasonication. It appears that although chemical inoculation utilises higher potency nucleants, more nucleation events are favoured under cavitation.
published_date 2017-10-15T03:42:50Z
_version_ 1763751987338280960
score 11.037603

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