Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates

Composite is a material system composed of a mixture or combination of two or more constituents that differ in form and chemical composition and which are essentially insoluble in each other. Metal matrix composites (MMC) are engineered materials composed of an elemental or alloy as a matrix in whic...

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Main Author:	Fatchurrohman, Nanang
Format:	Thesis
Language:	English
Published:	2009
Subjects:	Solidification Silicon Alloy Aluminum
Online Access:	http://psasir.upm.edu.my/id/eprint/77592/1/FK%202009%20110%20ir.pdf
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id	my-upm-ir.77592
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spelling	my-upm-ir.775922022-01-26T08:06:36Z Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates 2009-10 Fatchurrohman, Nanang Composite is a material system composed of a mixture or combination of two or more constituents that differ in form and chemical composition and which are essentially insoluble in each other. Metal matrix composites (MMC) are engineered materials composed of an elemental or alloy as a matrix in which an insoluble second phase reinforcer is embedded and distributed to achieve property improvement. Application of MMC comprises a broad range in aircraft, automotive, defence technology and astronautics components. The performance during its work life of MMC is determined by the mechanical properties. The mechanical properties of MMC are linked to microconstituents formed and its characteristics. For MMC processed by casting method, the solidification behaviour will determine the type of microconstituents formed and its properties. In this study, casting via vortex mixing method is employed to produce MMC aluminium-ll.8% silicon alloy (LM6) reinforced with different volume percentages (0,5,10,15,20,25%) of titanium particulates (TiCp) cast using sand and copper moulds. Temperature measurements during cooling and solidification are used as the main source to analyse solidification properties (fraction solid and latent heat generation) using Fourier thermal analysis method. A metallographic study is performed to observe the particulates distribution and microconstituents present. A hardness test is carried out, the results show that 25% volume addition ofTiCp cast using copper mould has the best result. This result correspond to the improved microstructure as particulates are well distributed in the matrix which can be seen on the photomicrographs. From the visual observation of photomicrographs, the increment addition of particulates will promote more nucleation sites and grain size is reduced due to faster solidification of casting using copper mould (high heat extraction capacity). For production using sand mould the maximum mean value of hardness 54.38 Rockwell number is reached by addition of 25% volume content TiCp , solidification time (fraction solid equals to 1) at 195 seconds and volumetric latent heat generated 245.63 103kJ/m3. The best result is obtained by fabrication of LM6- TiCp MMC using copper mould (permanent die), the maximum mean value of hardness 76.82 Rockwell number is reached by addition of 25% TiCp volume content, solidification time (fraction equals to 1) at 5 seconds (fastest) and volumetric latent heat generated 100.77 kJ/m3. From the results, it is concluded that casting of LM6- TiCp MMC is successfully achieved using vortex mixing technique and that addition of particulates influence solidification characteristics which in turn affect the properties of the MMC. Solidification Silicon Alloy Aluminum 2009-10 Thesis http://psasir.upm.edu.my/id/eprint/77592/ http://psasir.upm.edu.my/id/eprint/77592/1/FK%202009%20110%20ir.pdf text en public masters Universiti Putra Malaysia Solidification Silicon Alloy Aluminum Sulaiman, Shamsuddin
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English
advisor	Sulaiman, Shamsuddin
topic	Solidification Silicon Alloy Aluminum
spellingShingle	Solidification Silicon Alloy Aluminum Fatchurrohman, Nanang Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
description	Composite is a material system composed of a mixture or combination of two or more constituents that differ in form and chemical composition and which are essentially insoluble in each other. Metal matrix composites (MMC) are engineered materials composed of an elemental or alloy as a matrix in which an insoluble second phase reinforcer is embedded and distributed to achieve property improvement. Application of MMC comprises a broad range in aircraft, automotive, defence technology and astronautics components. The performance during its work life of MMC is determined by the mechanical properties. The mechanical properties of MMC are linked to microconstituents formed and its characteristics. For MMC processed by casting method, the solidification behaviour will determine the type of microconstituents formed and its properties. In this study, casting via vortex mixing method is employed to produce MMC aluminium-ll.8% silicon alloy (LM6) reinforced with different volume percentages (0,5,10,15,20,25%) of titanium particulates (TiCp) cast using sand and copper moulds. Temperature measurements during cooling and solidification are used as the main source to analyse solidification properties (fraction solid and latent heat generation) using Fourier thermal analysis method. A metallographic study is performed to observe the particulates distribution and microconstituents present. A hardness test is carried out, the results show that 25% volume addition ofTiCp cast using copper mould has the best result. This result correspond to the improved microstructure as particulates are well distributed in the matrix which can be seen on the photomicrographs. From the visual observation of photomicrographs, the increment addition of particulates will promote more nucleation sites and grain size is reduced due to faster solidification of casting using copper mould (high heat extraction capacity). For production using sand mould the maximum mean value of hardness 54.38 Rockwell number is reached by addition of 25% volume content TiCp , solidification time (fraction solid equals to 1) at 195 seconds and volumetric latent heat generated 245.63 103kJ/m3. The best result is obtained by fabrication of LM6- TiCp MMC using copper mould (permanent die), the maximum mean value of hardness 76.82 Rockwell number is reached by addition of 25% TiCp volume content, solidification time (fraction equals to 1) at 5 seconds (fastest) and volumetric latent heat generated 100.77 kJ/m3. From the results, it is concluded that casting of LM6- TiCp MMC is successfully achieved using vortex mixing technique and that addition of particulates influence solidification characteristics which in turn affect the properties of the MMC.
format	Thesis
qualification_level	Master's degree
author	Fatchurrohman, Nanang
author_facet	Fatchurrohman, Nanang
author_sort	Fatchurrohman, Nanang
title	Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
title_short	Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
title_full	Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
title_fullStr	Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
title_full_unstemmed	Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
title_sort	solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates
granting_institution	Universiti Putra Malaysia
publishDate	2009
url	http://psasir.upm.edu.my/id/eprint/77592/1/FK%202009%20110%20ir.pdf
_version_	1747813234990120960

Solidification analysis of metal matrix composites aluminium 11.8% silicon alloy reinforced with titanium carbide particulates

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