Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy

This study focuses on the effect of pin taper tool ratio on friction stir welding of magnesium alloy AZ31. Two pieces of AZ31 alloy with thickness of 6 mm were friction stir welded by using conventional milling machine. The shoulder diameter used in this experiment is fixed at 18mm. The taper pin ra...

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Main Authors:	Nurul Hidayah, Othman, N., Udin, M., Ishak, L. H., Shah
Format:	Article
Language:	English
Published:	World Academy of Science, Engineering and Technology 2016
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/13129/ http://umpir.ump.edu.my/id/eprint/13129/ http://umpir.ump.edu.my/id/eprint/13129/1/Effect-of-Taper-Pin-Ratio-on-Microstructure-and-Mechanical-Property-of-Friction-Stir-Welded-AZ31-Magnesium-Alloy.pdf

id	ump-13129
recordtype	eprints
spelling	ump-131292017-01-24T00:45:02Z http://umpir.ump.edu.my/id/eprint/13129/ Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy Nurul Hidayah, Othman N., Udin M., Ishak L. H., Shah TJ Mechanical engineering and machinery This study focuses on the effect of pin taper tool ratio on friction stir welding of magnesium alloy AZ31. Two pieces of AZ31 alloy with thickness of 6 mm were friction stir welded by using conventional milling machine. The shoulder diameter used in this experiment is fixed at 18mm. The taper pin ratio used are varied at 6:6, 6:5, 6:4, 6:3, 6:2 and 6:1. The rotational speeds that were used in this study were 500 rpm, 1000 rpm and 1500 rpm, respectively. The welding speeds used are 150 mm/min, 200 mm/min and 250 mm/min. Microstructure observation of welded area was studied by using optical microscope. Equiaxed grains were observed at the TMAZ and stir zone indicating fully plastic deformation. Tool pin diameter ratio 6/1 causes low heat input to the material because of small contact surface between tool surface and stirred materials compared to other tool pin diameter ratio. The grain size of stir zone increased with increasing of ratio of rotational speed to transverse speed due to higher heat input. It is observed that, worm hole is produced when excessive heat input is applied. To evaluate the mechanical properties of this specimen, tensile test was used in this study. Welded specimens using taper pin ratio 6:1 shows higher tensile strength compared to other taper pin ratio up to 204 MPa. Moreover, specimens using taper pin ratio 6:1 showed better tensile strength with 500 rpm of rotational speed and 150mm/min welding speed. World Academy of Science, Engineering and Technology 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/13129/1/Effect-of-Taper-Pin-Ratio-on-Microstructure-and-Mechanical-Property-of-Friction-Stir-Welded-AZ31-Magnesium-Alloy.pdf Nurul Hidayah, Othman and N., Udin and M., Ishak and L. H., Shah (2016) Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy. International Journal of Chemical, Molecular, Nuclear, Materials and Metallurgical Engineering, 10 (5). pp. 586-589. ISSN 1307-6892 http://www.waset.org/publications/10004560
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 Nurul Hidayah, Othman N., Udin M., Ishak L. H., Shah Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy
description	This study focuses on the effect of pin taper tool ratio on friction stir welding of magnesium alloy AZ31. Two pieces of AZ31 alloy with thickness of 6 mm were friction stir welded by using conventional milling machine. The shoulder diameter used in this experiment is fixed at 18mm. The taper pin ratio used are varied at 6:6, 6:5, 6:4, 6:3, 6:2 and 6:1. The rotational speeds that were used in this study were 500 rpm, 1000 rpm and 1500 rpm, respectively. The welding speeds used are 150 mm/min, 200 mm/min and 250 mm/min. Microstructure observation of welded area was studied by using optical microscope. Equiaxed grains were observed at the TMAZ and stir zone indicating fully plastic deformation. Tool pin diameter ratio 6/1 causes low heat input to the material because of small contact surface between tool surface and stirred materials compared to other tool pin diameter ratio. The grain size of stir zone increased with increasing of ratio of rotational speed to transverse speed due to higher heat input. It is observed that, worm hole is produced when excessive heat input is applied. To evaluate the mechanical properties of this specimen, tensile test was used in this study. Welded specimens using taper pin ratio 6:1 shows higher tensile strength compared to other taper pin ratio up to 204 MPa. Moreover, specimens using taper pin ratio 6:1 showed better tensile strength with 500 rpm of rotational speed and 150mm/min welding speed.
format	Article
author	Nurul Hidayah, Othman N., Udin M., Ishak L. H., Shah
author_facet	Nurul Hidayah, Othman N., Udin M., Ishak L. H., Shah
author_sort	Nurul Hidayah, Othman
title	Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy
title_short	Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy
title_full	Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy
title_fullStr	Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy
title_full_unstemmed	Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy
title_sort	effect of taper pin ratio on microstructure and mechanical property of friction stir welded az31 magnesium alloy
publisher	World Academy of Science, Engineering and Technology
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/13129/ http://umpir.ump.edu.my/id/eprint/13129/ http://umpir.ump.edu.my/id/eprint/13129/1/Effect-of-Taper-Pin-Ratio-on-Microstructure-and-Mechanical-Property-of-Friction-Stir-Welded-AZ31-Magnesium-Alloy.pdf
first_indexed	2023-09-18T22:15:22Z
last_indexed	2023-09-18T22:15:22Z
_version_	1777415301804064768

Effect of Taper Pin Ratio on Microstructure and Mechanical Property of Friction Stir Welded AZ31 Magnesium Alloy

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