The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy

The direct thermal method is used for the creation of globular microstructures suitable for semi-solid metal forming. In this paper, both simulation and experimental results using direct thermal method are presented. ProCAST® software was used to estimate temperature distribution inside the aluminum...

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Main Authors:	Asnul Hadi, Ahmad, Naher, S., Brabazon, D.
Format:	Article
Published:	Taylor & Francis 2014
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/5718/ http://umpir.ump.edu.my/id/eprint/5718/ http://umpir.ump.edu.my/id/eprint/5718/

id	ump-5718
recordtype	eprints
spelling	ump-57182018-05-16T03:46:00Z http://umpir.ump.edu.my/id/eprint/5718/ The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy Asnul Hadi, Ahmad Naher, S. Brabazon, D. TJ Mechanical engineering and machinery The direct thermal method is used for the creation of globular microstructures suitable for semi-solid metal forming. In this paper, both simulation and experimental results using direct thermal method are presented. ProCAST® software was used to estimate temperature distribution inside the aluminum billet. In validation work, molten aluminum A356 was poured into metallic copper tube molds and cooled down to the semi-solid temperature before being quenched in water at room temperature. The effect of pouring temperatures of 630°C, 650°C, 665°C, 680°C and holding times of 45s and 60s on the microstructure of aluminum A356 alloy were investigated. The simulation results showed that the average temperature rate within the copper mold, from initial pouring temperature to just before quenching, was approximately 1°C/s. Examination of the solidified microstructures showed that the microstructure was more spherical when lower pouring temperatures and holding periods were used. From the micrographs it was found that the most globular and smallest structures were achieved at processing parameters of 630°C and 45s. Taylor & Francis 2014-05-13 Article PeerReviewed Asnul Hadi, Ahmad and Naher, S. and Brabazon, D. (2014) The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy. Materials and Manufacturing Processes, 29 (2). pp. 134-139. ISSN 1042-6914 (print), 1532-2475 (online) http://dx.doi.org/10.1080/10426914.2013.822980 DOI:10.1080/10426914.2013.822980
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Asnul Hadi, Ahmad Naher, S. Brabazon, D. The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy
description	The direct thermal method is used for the creation of globular microstructures suitable for semi-solid metal forming. In this paper, both simulation and experimental results using direct thermal method are presented. ProCAST® software was used to estimate temperature distribution inside the aluminum billet. In validation work, molten aluminum A356 was poured into metallic copper tube molds and cooled down to the semi-solid temperature before being quenched in water at room temperature. The effect of pouring temperatures of 630°C, 650°C, 665°C, 680°C and holding times of 45s and 60s on the microstructure of aluminum A356 alloy were investigated. The simulation results showed that the average temperature rate within the copper mold, from initial pouring temperature to just before quenching, was approximately 1°C/s. Examination of the solidified microstructures showed that the microstructure was more spherical when lower pouring temperatures and holding periods were used. From the micrographs it was found that the most globular and smallest structures were achieved at processing parameters of 630°C and 45s.
format	Article
author	Asnul Hadi, Ahmad Naher, S. Brabazon, D.
author_facet	Asnul Hadi, Ahmad Naher, S. Brabazon, D.
author_sort	Asnul Hadi, Ahmad
title	The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy
title_short	The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy
title_full	The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy
title_fullStr	The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy
title_full_unstemmed	The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy
title_sort	effect of direct thermal method, temperature and time on microstructure of a cast aluminum alloy
publisher	Taylor & Francis
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/5718/ http://umpir.ump.edu.my/id/eprint/5718/ http://umpir.ump.edu.my/id/eprint/5718/
first_indexed	2023-09-18T22:01:05Z
last_indexed	2023-09-18T22:01:05Z
_version_	1777414403212181504

The Effect of Direct Thermal Method, Temperature and Time on Microstructure of a Cast Aluminum Alloy

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