Alloying of aluminium surface with Q-switched Nd:YAG laser

In surface modification, laser has been used as a tool to improve and enhance the surface properties of metallic alloys through laser alloying technique. Therefore, the aim of this study is to modify aluminium surface with iron (Fe) and copper (Cu) by Q-switched Nd:YAG laser. The Q-switched Nd:YAG l...

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Main Author:	Shaharin, Mohd. Shafiq
Format:	Thesis
Language:	English
Published:	2015
Subjects:	QC Physics
Online Access:	http://eprints.utm.my/id/eprint/54640/1/MohdShafiqShaharinMFS2015.pdf
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spelling	my-utm-ep.546402020-10-21T02:49:18Z Alloying of aluminium surface with Q-switched Nd:YAG laser 2015-04 Shaharin, Mohd. Shafiq QC Physics In surface modification, laser has been used as a tool to improve and enhance the surface properties of metallic alloys through laser alloying technique. Therefore, the aim of this study is to modify aluminium surface with iron (Fe) and copper (Cu) by Q-switched Nd:YAG laser. The Q-switched Nd:YAG laser is operating at a fundamental wavelength of 1064 nm with 10 ns pulse duration. The laser optimized parameters in this work are focus distance, pulse width and pulse energy. The target consists of a pure aluminium plate and the two alloying elements used are iron (Fe) and copper (Cu) powders. The alloying elements were well mixed and prepared in four different ratios (Fe:Cu) of (1:0), (1:1), (2:1), and (3:1). The surface alloying process was carried out by varying the laser output energy delivered to the targets from 67 to 331 mJ per pulse. The modified surfaces were characterized by using three types of analysis; structural elemental, and mechanical analysis. The results from field emission scanning electron microscopy (FESEM) showed that the surface microstructures change significantly compared to the untreated surface. The formation of alloyed layer due to the rapid melting and solidification processes of alloying elements with aluminium substrate was observed. In addition, all the treated surfaces show less porosity and are free from any cracks. X-ray diffraction (XRD) analysis of the treated surface showed the formation of new compounds which comprise AlCu, AlFe, CuFe and AlFeCu. The maximum hardness of the treated surfaces as measured using microhardness tester is 86.2 HV which is two times higher than that of the untreated surface. The formation of intermetallic phases and the change in the surface microstructures are responsible for the increase in the surface hardness compared to untreated one. 2015-04 Thesis http://eprints.utm.my/id/eprint/54640/ http://eprints.utm.my/id/eprint/54640/1/MohdShafiqShaharinMFS2015.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:86600 masters Universiti Teknologi Malaysia, Faculty of science Faculty of science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	QC Physics
spellingShingle	QC Physics Shaharin, Mohd. Shafiq Alloying of aluminium surface with Q-switched Nd:YAG laser
description	In surface modification, laser has been used as a tool to improve and enhance the surface properties of metallic alloys through laser alloying technique. Therefore, the aim of this study is to modify aluminium surface with iron (Fe) and copper (Cu) by Q-switched Nd:YAG laser. The Q-switched Nd:YAG laser is operating at a fundamental wavelength of 1064 nm with 10 ns pulse duration. The laser optimized parameters in this work are focus distance, pulse width and pulse energy. The target consists of a pure aluminium plate and the two alloying elements used are iron (Fe) and copper (Cu) powders. The alloying elements were well mixed and prepared in four different ratios (Fe:Cu) of (1:0), (1:1), (2:1), and (3:1). The surface alloying process was carried out by varying the laser output energy delivered to the targets from 67 to 331 mJ per pulse. The modified surfaces were characterized by using three types of analysis; structural elemental, and mechanical analysis. The results from field emission scanning electron microscopy (FESEM) showed that the surface microstructures change significantly compared to the untreated surface. The formation of alloyed layer due to the rapid melting and solidification processes of alloying elements with aluminium substrate was observed. In addition, all the treated surfaces show less porosity and are free from any cracks. X-ray diffraction (XRD) analysis of the treated surface showed the formation of new compounds which comprise AlCu, AlFe, CuFe and AlFeCu. The maximum hardness of the treated surfaces as measured using microhardness tester is 86.2 HV which is two times higher than that of the untreated surface. The formation of intermetallic phases and the change in the surface microstructures are responsible for the increase in the surface hardness compared to untreated one.
format	Thesis
qualification_level	Master's degree
author	Shaharin, Mohd. Shafiq
author_facet	Shaharin, Mohd. Shafiq
author_sort	Shaharin, Mohd. Shafiq
title	Alloying of aluminium surface with Q-switched Nd:YAG laser
title_short	Alloying of aluminium surface with Q-switched Nd:YAG laser
title_full	Alloying of aluminium surface with Q-switched Nd:YAG laser
title_fullStr	Alloying of aluminium surface with Q-switched Nd:YAG laser
title_full_unstemmed	Alloying of aluminium surface with Q-switched Nd:YAG laser
title_sort	alloying of aluminium surface with q-switched nd:yag laser
granting_institution	Universiti Teknologi Malaysia, Faculty of science
granting_department	Faculty of science
publishDate	2015
url	http://eprints.utm.my/id/eprint/54640/1/MohdShafiqShaharinMFS2015.pdf
_version_	1747817694114086912

Alloying of aluminium surface with Q-switched Nd:YAG laser

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