Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy

Conventional arc welding processes are difficult to use to join thin sheet magnesium alloy because of the necessity of high energy input, which in turn leads to various problems such as burn through and distortion. Alternatively, laser welding can resolve these problems because of lower heat input a...

Full description

Bibliographic Details
Main Authors:	M., Ishak, Yamasaki, Kazuhiko, Maekawa, Katsuhiro
Other Authors:	Andreas, Öchsner
Format:	Book Section
Language:	English
Published:	Springer International Publishing 2013
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/3867/ http://umpir.ump.edu.my/id/eprint/3867/ http://umpir.ump.edu.my/id/eprint/3867/ http://umpir.ump.edu.my/id/eprint/3867/1/FKM-2013-Mahadzir-characteristics_of_welded.pdf

id	ump-3867
recordtype	eprints
spelling	ump-38672015-06-23T07:15:55Z http://umpir.ump.edu.my/id/eprint/3867/ Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy M., Ishak Yamasaki, Kazuhiko Maekawa, Katsuhiro TJ Mechanical engineering and machinery Conventional arc welding processes are difficult to use to join thin sheet magnesium alloy because of the necessity of high energy input, which in turn leads to various problems such as burn through and distortion. Alternatively, laser welding can resolve these problems because of lower heat input and smaller spot size compared to conventional welding. Even when using laser welding, it is difficult to weld thin magnesium sheets with a thickness of less than 1 mm; cut, melt through and cracks tend to occur due to the evaporation of molten metal and high solidification rate. In this study, an attempt has been made to lap fillet welding of thin sheet magnesium alloy AZ31B with a thickness of 0.3 mm using a pulsed Nd:YAG laser beam in a conduction mode. This paper investigates the occurrence of defects in the lap fillet joint of AZ31B magnesium alloys. Defects such as void and cracks were observed at the weld root. A void at the root occurred because of lack of fusion due to insufficient melting of the lower sheet. The void was reduced by grinding the metal surface to eliminate the oxide layer. Cracks generated in large grain areas initiated from the void at the root. A higher scan speed significantly improves the defect behaviour because of generating a narrow large grain area and wider fine grain area. Macropore-free weld was obtained in this laser welding research, and smaller amount of micropores than the base metal can be attained. Springer International Publishing Andreas, Öchsner Altenbach, Holm 2013 Book Section PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/3867/1/FKM-2013-Mahadzir-characteristics_of_welded.pdf M., Ishak and Yamasaki, Kazuhiko and Maekawa, Katsuhiro (2013) Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy. In: Experimental and Numerical Investigation of Advanced Materials and Structures. Advanced Structured Materials, 41 . Springer International Publishing, pp. 147-160. ISBN 978-3-319-00505-8 (print), 978-3-319-00506-5 (online) http://dx.doi.org/10.1007/978-3-319-00506-5_9 DOI: 10.1007/978-3-319-00506-5_9
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery M., Ishak Yamasaki, Kazuhiko Maekawa, Katsuhiro Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy
description	Conventional arc welding processes are difficult to use to join thin sheet magnesium alloy because of the necessity of high energy input, which in turn leads to various problems such as burn through and distortion. Alternatively, laser welding can resolve these problems because of lower heat input and smaller spot size compared to conventional welding. Even when using laser welding, it is difficult to weld thin magnesium sheets with a thickness of less than 1 mm; cut, melt through and cracks tend to occur due to the evaporation of molten metal and high solidification rate. In this study, an attempt has been made to lap fillet welding of thin sheet magnesium alloy AZ31B with a thickness of 0.3 mm using a pulsed Nd:YAG laser beam in a conduction mode. This paper investigates the occurrence of defects in the lap fillet joint of AZ31B magnesium alloys. Defects such as void and cracks were observed at the weld root. A void at the root occurred because of lack of fusion due to insufficient melting of the lower sheet. The void was reduced by grinding the metal surface to eliminate the oxide layer. Cracks generated in large grain areas initiated from the void at the root. A higher scan speed significantly improves the defect behaviour because of generating a narrow large grain area and wider fine grain area. Macropore-free weld was obtained in this laser welding research, and smaller amount of micropores than the base metal can be attained.
author2	Andreas, Öchsner
author_facet	Andreas, Öchsner M., Ishak Yamasaki, Kazuhiko Maekawa, Katsuhiro
format	Book Section
author	M., Ishak Yamasaki, Kazuhiko Maekawa, Katsuhiro
author_sort	M., Ishak
title	Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy
title_short	Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy
title_full	Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy
title_fullStr	Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy
title_full_unstemmed	Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy
title_sort	characteristics of welded thin sheet az31 magnesium alloy
publisher	Springer International Publishing
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/3867/ http://umpir.ump.edu.my/id/eprint/3867/ http://umpir.ump.edu.my/id/eprint/3867/ http://umpir.ump.edu.my/id/eprint/3867/1/FKM-2013-Mahadzir-characteristics_of_welded.pdf
first_indexed	2023-09-18T21:58:26Z
last_indexed	2023-09-18T21:58:26Z
_version_	1777414235933900800

Characteristics of Welded Thin Sheet AZ31 Magnesium Alloy

Similar Items