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Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium

The effects of Mg content on the microstructure and tensile properties of thixoformed A319 alloys were studied. The samples were thixoformed at 50% liquid content and some of the thixoformed samples were subjected to the T6 heat treatment. The samples were then examined by optical microscopy (OM), s...

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Main Authors:	Salleh, Mohd Shukor, Omar, Mohd Zaidi, Alhawari, Khalid Salim, Mohammed, Mohammed Naser, Md Ali, Mohd Amran, Mohamad, Effendi
Format:	Article
Language:	English
Published:	Elsevier 2016
Subjects:	TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery
Online Access:	http://eprints.utem.edu.my/id/eprint/17085/1/Microstructural%20evolution%20and%20mechanical%20properties%20of%20thixoformed%20A319%20alloys%20containing%20varaiable%20amounts%20of%20magnesium.pdf http://eprints.utem.edu.my/id/eprint/17085/
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spelling	my.utem.eprints.170852016-09-07T08:16:19Z http://eprints.utem.edu.my/id/eprint/17085/ Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium Salleh, Mohd Shukor Omar, Mohd Zaidi Alhawari, Khalid Salim Mohammed, Mohammed Naser Md Ali, Mohd Amran Mohamad, Effendi TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery The effects of Mg content on the microstructure and tensile properties of thixoformed A319 alloys were studied. The samples were thixoformed at 50% liquid content and some of the thixoformed samples were subjected to the T6 heat treatment. The samples were then examined by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy and X-ray diffraction (XRD) analysis as well as tensile tests. The results showed that magnesium was able to refine the eutectic silicon in the samples. It was also observed that a compact Al9FeMg3Si5 phase was formed when the magnesium content was 1.0% and 1.5%. The results also revealed that as the magnesium content in the alloy increases, the tensile strengths of the thixoformed alloys also increase. The ultimate tensile strength, yield strength and elongation to fracture of the thixoformed A319 heat treated alloy were 298 MPa, 201 MPa and 4.5%, respectively, whereas the values of the thixoformed heat treated alloy with 1.5% Mg content were 325 MPa, 251 MPa and 1.4%, respectively. Thixoformed A319 alloy showed a dimple fracture behaviour, while thixoformed A319 alloys with 1.5% Mg showed a mixed mode fracture behaviour, where dimple and cleavage ruptures were seen on the fracture surface of the samples. Elsevier 2016-09-01 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/17085/1/Microstructural%20evolution%20and%20mechanical%20properties%20of%20thixoformed%20A319%20alloys%20containing%20varaiable%20amounts%20of%20magnesium.pdf Salleh, Mohd Shukor and Omar, Mohd Zaidi and Alhawari, Khalid Salim and Mohammed, Mohammed Naser and Md Ali, Mohd Amran and Mohamad, Effendi (2016) Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium. Transactions of Nonferrous Metals Society of China, 26. pp. 2029-2042. ISSN 1003-6326
institution	Universiti Teknikal Malaysia Melaka
building	UTEM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknikal Malaysia Melaka
content_source	UTEM Institutional Repository
url_provider	http://eprints.utem.edu.my/
language	English
topic	TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery
spellingShingle	TA Engineering (General). Civil engineering (General) TJ Mechanical engineering and machinery Salleh, Mohd Shukor Omar, Mohd Zaidi Alhawari, Khalid Salim Mohammed, Mohammed Naser Md Ali, Mohd Amran Mohamad, Effendi Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium
description	The effects of Mg content on the microstructure and tensile properties of thixoformed A319 alloys were studied. The samples were thixoformed at 50% liquid content and some of the thixoformed samples were subjected to the T6 heat treatment. The samples were then examined by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) spectroscopy and X-ray diffraction (XRD) analysis as well as tensile tests. The results showed that magnesium was able to refine the eutectic silicon in the samples. It was also observed that a compact Al9FeMg3Si5 phase was formed when the magnesium content was 1.0% and 1.5%. The results also revealed that as the magnesium content in the alloy increases, the tensile strengths of the thixoformed alloys also increase. The ultimate tensile strength, yield strength and elongation to fracture of the thixoformed A319 heat treated alloy were 298 MPa, 201 MPa and 4.5%, respectively, whereas the values of the thixoformed heat treated alloy with 1.5% Mg content were 325 MPa, 251 MPa and 1.4%, respectively. Thixoformed A319 alloy showed a dimple fracture behaviour, while thixoformed A319 alloys with 1.5% Mg showed a mixed mode fracture behaviour, where dimple and cleavage ruptures were seen on the fracture surface of the samples.
format	Article
author	Salleh, Mohd Shukor Omar, Mohd Zaidi Alhawari, Khalid Salim Mohammed, Mohammed Naser Md Ali, Mohd Amran Mohamad, Effendi
author_facet	Salleh, Mohd Shukor Omar, Mohd Zaidi Alhawari, Khalid Salim Mohammed, Mohammed Naser Md Ali, Mohd Amran Mohamad, Effendi
author_sort	Salleh, Mohd Shukor
title	Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium
title_short	Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium
title_full	Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium
title_fullStr	Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium
title_full_unstemmed	Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium
title_sort	microstructural evolution and mechanical properties of thixoformed a319 alloys containing variable amounts of magnesium
publisher	Elsevier
publishDate	2016
url	http://eprints.utem.edu.my/id/eprint/17085/1/Microstructural%20evolution%20and%20mechanical%20properties%20of%20thixoformed%20A319%20alloys%20containing%20varaiable%20amounts%20of%20magnesium.pdf http://eprints.utem.edu.my/id/eprint/17085/
_version_	1665905670625427456
score	13.211869

Microstructural evolution and mechanical properties of thixoformed A319 alloys containing variable amounts of magnesium

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