Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting

The hypereutectic AlSi alloys contain Si more than 12.3 % (eutectic point), and possesses better mechanical properties than eutectic and hypoeutectic AlSi alloys. But the higher percentage of Si in the hypereutectic AlSi alloy caused to result primary and eutectic Si in microstructure during melt...

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Main Author:	Ahmed Bhutto, Aqeel
Format:	Thesis
Language:	English English English
Published:	2021
Subjects:	TA401-492 Materials of engineering and construction Mechanics of materials
Online Access:	http://eprints.uthm.edu.my/1776/2/AQEEL%20AHMED%20BHUTTO%20-%20declaration.pdf http://eprints.uthm.edu.my/1776/1/AQEEL%20AHMED%20BHUTTO%20-%2024p.pdf http://eprints.uthm.edu.my/1776/3/AQEEL%20AHMED%20BHUTTO%20-%20fulltext.pdf
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spelling	my-uthm-ep.17762021-10-11T07:45:53Z Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting 2021-02 Ahmed Bhutto, Aqeel TA401-492 Materials of engineering and construction. Mechanics of materials The hypereutectic AlSi alloys contain Si more than 12.3 % (eutectic point), and possesses better mechanical properties than eutectic and hypoeutectic AlSi alloys. But the higher percentage of Si in the hypereutectic AlSi alloy caused to result primary and eutectic Si in microstructure during melting, which in turns to hitch the mechanical properties. The proper control of microstructure and addition of common reinforcement materials (SiC, Al2O3, TiB2) in hypereutectic AlSi alloy will improve mechanical properties. Thus, in this research work, ADC14 hypereutectic AlSi alloy based composite reinforced with SiC (5 to 20%), Al2O3 (5 to 15%) and TiB2 (2 to 8%) was developed through stir casting. The mechanical, physical and thermal properties, and microstructure were investigated for the developed composite through ASTM standards. The results showed that tensile strengths and hardness of all the three composites were increased by increasing the weight percentage of all three reinforcements. The maximum values of ultimate tensile strength and hardness were obtained as 115.81 MPa and 69 HV for 20% of SiC and 8% of TiB2 reinforcements respectively. For physical properties, the optimum values were obtained as 2.67 g/cm3 and 0.023% for 8% of TiB2 and 5% of SiC respectively. For thermal properties, the optimum values were obtained as 178 W/mK and 10.7 1/ºC x 10−6 for 20% of SiC and 15% of Al2O3 respectively. Furthermore, the addition of Al2O3 improved the microstructure of ADC14 hypereutectic alloy based composite. And minor porosities were observed in microscopic images. Comprehensively, all three reinforced materials improved the mechanical, physical and thermal properties of the ADC14 hypereutectic AlSi alloy based composite. The development of ADC14 composite may provide some practical knowledge in materials engineering. Also, based on the results of hardness and thermal properties, the developed composite can be applied for automotive part. 2021-02 Thesis http://eprints.uthm.edu.my/1776/ http://eprints.uthm.edu.my/1776/2/AQEEL%20AHMED%20BHUTTO%20-%20declaration.pdf text en staffonly http://eprints.uthm.edu.my/1776/1/AQEEL%20AHMED%20BHUTTO%20-%2024p.pdf text en public http://eprints.uthm.edu.my/1776/3/AQEEL%20AHMED%20BHUTTO%20-%20fulltext.pdf text en validuser phd doctoral Universiti Tun Hussein Onn Malaysia Faculty of Mechanical and Manufacturing Engineering
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TA401-492 Materials of engineering and construction Mechanics of materials
spellingShingle	TA401-492 Materials of engineering and construction Mechanics of materials Ahmed Bhutto, Aqeel Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
description	The hypereutectic AlSi alloys contain Si more than 12.3 % (eutectic point), and possesses better mechanical properties than eutectic and hypoeutectic AlSi alloys. But the higher percentage of Si in the hypereutectic AlSi alloy caused to result primary and eutectic Si in microstructure during melting, which in turns to hitch the mechanical properties. The proper control of microstructure and addition of common reinforcement materials (SiC, Al2O3, TiB2) in hypereutectic AlSi alloy will improve mechanical properties. Thus, in this research work, ADC14 hypereutectic AlSi alloy based composite reinforced with SiC (5 to 20%), Al2O3 (5 to 15%) and TiB2 (2 to 8%) was developed through stir casting. The mechanical, physical and thermal properties, and microstructure were investigated for the developed composite through ASTM standards. The results showed that tensile strengths and hardness of all the three composites were increased by increasing the weight percentage of all three reinforcements. The maximum values of ultimate tensile strength and hardness were obtained as 115.81 MPa and 69 HV for 20% of SiC and 8% of TiB2 reinforcements respectively. For physical properties, the optimum values were obtained as 2.67 g/cm3 and 0.023% for 8% of TiB2 and 5% of SiC respectively. For thermal properties, the optimum values were obtained as 178 W/mK and 10.7 1/ºC x 10−6 for 20% of SiC and 15% of Al2O3 respectively. Furthermore, the addition of Al2O3 improved the microstructure of ADC14 hypereutectic alloy based composite. And minor porosities were observed in microscopic images. Comprehensively, all three reinforced materials improved the mechanical, physical and thermal properties of the ADC14 hypereutectic AlSi alloy based composite. The development of ADC14 composite may provide some practical knowledge in materials engineering. Also, based on the results of hardness and thermal properties, the developed composite can be applied for automotive part.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Ahmed Bhutto, Aqeel
author_facet	Ahmed Bhutto, Aqeel
author_sort	Ahmed Bhutto, Aqeel
title	Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
title_short	Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
title_full	Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
title_fullStr	Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
title_full_unstemmed	Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting
title_sort	development of adc14 hypereutectic alsi alloy based composite reinforced with sic , al2o3 and tib2 through stir casting
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Mechanical and Manufacturing Engineering
publishDate	2021
url	http://eprints.uthm.edu.my/1776/2/AQEEL%20AHMED%20BHUTTO%20-%20declaration.pdf http://eprints.uthm.edu.my/1776/1/AQEEL%20AHMED%20BHUTTO%20-%2024p.pdf http://eprints.uthm.edu.my/1776/3/AQEEL%20AHMED%20BHUTTO%20-%20fulltext.pdf
_version_	1747830864753983488

Development of ADC14 hypereutectic ALSi alloy based composite reinforced with SiC , Al2O3 and TiB2 through stir casting

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