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Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys

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Main Authors: Mazlee, Mohd. Noor, Shamsul Baharin, Jamaludin, Kamarudin, Hussin
Other Authors: mazlee@unimap.edu.my
Format: Article
Language:English
Published: Slovak Academy of Sciences 2010
Subjects:
A357
Melt superheat treatment
Grain boundary damping
Dynamic mechanical analyzer (DMA)
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/8065
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spelling my.unimap-80652014-03-23T05:48:40Z Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys Mazlee, Mohd. Noor Shamsul Baharin, Jamaludin Kamarudin, Hussin mazlee@unimap.edu.my A357 Melt superheat treatment Grain boundary damping Dynamic mechanical analyzer (DMA) Link to publisher's homepage at http://kovmat.sav.sk/covers.php The influence of superheat treatment on the microstructure and dynamic mechanical properties of A357 alloys has been investigated. The study of microstructure was performed by optical microscope. Dynamic mechanical properties (storage modulus, loss modulus and damping capacity) were measured by the dynamic mechanical analyzer (DMA). Microstructure showed coarser and angular eutectic Si particles with larger α-Al dendrites in non-superheated A357 alloy. In contrast, finer and rounded eutectic Si particles together with smaller and preferably oriented α-Al dendrites have been observed in superheated A357 alloy. Dynamic mechanical properties showed an increasing trend of loss modulus and damping capacity, meanwhile a decreasing trend of storage modulus at elevated temperatures for superheated and nonsuperheated A357 alloys. The significant improvement of damping capacities has been observed at lower temperatures range (50 to 277◦C) and higher temperatures range (278 to 380◦C) in non-superheated A357 alloy and superheated A357 alloy, respectively. The high damping capacity of superheated A357 alloy has been ascribed to the grain boundary damping at elevated temperatures. 2010-06-02T03:28:43Z 2010-06-02T03:28:43Z 2010-03-01 Article Kovové materiály/Metallic Materials, vol. 48, 2010, pages 1-6 0023-432X http://kovmat.sav.sk/search4.php http://hdl.handle.net/123456789/8065 en Slovak Academy of Sciences
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic A357
Melt superheat treatment
Grain boundary damping
Dynamic mechanical analyzer (DMA)
spellingShingle A357
Melt superheat treatment
Grain boundary damping
Dynamic mechanical analyzer (DMA)
Mazlee, Mohd. Noor
Shamsul Baharin, Jamaludin
Kamarudin, Hussin
Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys
description Link to publisher's homepage at http://kovmat.sav.sk/covers.php
author2 mazlee@unimap.edu.my
author_facet mazlee@unimap.edu.my
Mazlee, Mohd. Noor
Shamsul Baharin, Jamaludin
Kamarudin, Hussin
format Article
author Mazlee, Mohd. Noor
Shamsul Baharin, Jamaludin
Kamarudin, Hussin
author_sort Mazlee, Mohd. Noor
title Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys
title_short Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys
title_full Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys
title_fullStr Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys
title_full_unstemmed Comparison of dynamic mechanical properties of non-superheated and superheated A357 alloys
title_sort comparison of dynamic mechanical properties of non-superheated and superheated a357 alloys
publisher Slovak Academy of Sciences
publishDate 2010
url http://dspace.unimap.edu.my/xmlui/handle/123456789/8065
_version_ 1643789041250861056
score 13.214268

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