Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets

The success of semi-solid metal forming is dependent on a globular solid grain formation within a liquid phase. This paper presents experimental works concerning semisolid metal processing of aluminium 7075 feedstock billets which were produced by direct thermal method. The flowability of feedstock...

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Main Authors: Asnul Hadi, Ahmad, S., Naher, D., Brabazon
Format: Article
Published: Trans Tech Publications 2014
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Online Access:http://umpir.ump.edu.my/id/eprint/8228/
http://dx.doi.org/10.4028/www.scientific.net/KEM.611-612.1637
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Institution: Universiti Malaysia Pahang
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spelling my.ump.umpir.82282021-10-06T23:55:57Z http://umpir.ump.edu.my/id/eprint/8228/ Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets Asnul Hadi, Ahmad S., Naher D., Brabazon TJ Mechanical engineering and machinery The success of semi-solid metal forming is dependent on a globular solid grain formation within a liquid phase. This paper presents experimental works concerning semisolid metal processing of aluminium 7075 feedstock billets which were produced by direct thermal method. The flowability of feedstock billets was evaluated by an injection test processing unit. The feedstock billets were heated to a temperature of 620 °C by using a box furnace before transferred into a forming die. The formed feedstock billet was removed from the forming die after it was cooled to ambient temperature. Several analyses were conducted on the formed feedstock billets including dimensional measurement and microstructure analysis. The results show that the feedstock billets which contained the highest amount of free secondary phase were most successfully formed. Microstructure analysis results also revealed the formation of more globular and larger α–Al solid grains in the same feedstock billets. In this experimental work, the feedstock billets with higher amount of secondary (liquid) phase had a significant effect on formability. It is concluded that in order to achieve successful formability of the direct thermal method feedstock billets, the billets need to a have higher secondary phase content. Thus, important preparation methods of feedstock billets were characterised in order to allow for SSM processing. Trans Tech Publications 2014 Article PeerReviewed Asnul Hadi, Ahmad and S., Naher and D., Brabazon (2014) Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets. Materials Science and Engineering, 611-612. pp. 1637-1644. http://dx.doi.org/10.4028/www.scientific.net/KEM.611-612.1637 DOI: 10.4028/www.scientific.net/KEM.611-612.1637
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
topic TJ Mechanical engineering and machinery
spellingShingle TJ Mechanical engineering and machinery
Asnul Hadi, Ahmad
S., Naher
D., Brabazon
Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets
description The success of semi-solid metal forming is dependent on a globular solid grain formation within a liquid phase. This paper presents experimental works concerning semisolid metal processing of aluminium 7075 feedstock billets which were produced by direct thermal method. The flowability of feedstock billets was evaluated by an injection test processing unit. The feedstock billets were heated to a temperature of 620 °C by using a box furnace before transferred into a forming die. The formed feedstock billet was removed from the forming die after it was cooled to ambient temperature. Several analyses were conducted on the formed feedstock billets including dimensional measurement and microstructure analysis. The results show that the feedstock billets which contained the highest amount of free secondary phase were most successfully formed. Microstructure analysis results also revealed the formation of more globular and larger α–Al solid grains in the same feedstock billets. In this experimental work, the feedstock billets with higher amount of secondary (liquid) phase had a significant effect on formability. It is concluded that in order to achieve successful formability of the direct thermal method feedstock billets, the billets need to a have higher secondary phase content. Thus, important preparation methods of feedstock billets were characterised in order to allow for SSM processing.
format Article
author Asnul Hadi, Ahmad
S., Naher
D., Brabazon
author_facet Asnul Hadi, Ahmad
S., Naher
D., Brabazon
author_sort Asnul Hadi, Ahmad
title Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets
title_short Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets
title_full Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets
title_fullStr Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets
title_full_unstemmed Injection Tests and Effect On Microstructure and Properties of Aluminium 7075 Direct Thermal Method Feedstock Billets
title_sort injection tests and effect on microstructure and properties of aluminium 7075 direct thermal method feedstock billets
publisher Trans Tech Publications
publishDate 2014
url http://umpir.ump.edu.my/id/eprint/8228/
http://dx.doi.org/10.4028/www.scientific.net/KEM.611-612.1637
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