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Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075

This project is to study the effects of welding parameters for aluminium alloy 7075 towards the material characterization. The welding process used is Gas Metal Arc Welding (GMAW). The raw material used in this project is Aluminium Alloy (AA) 7075 and welded by using the KUKA robotic welding machine...

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Main Author: Yomli, Sofia Mulyani
Format: Thesis
Language:English
English
Published: 2019
Subjects:
T Technology (General)
TS Manufactures
Online Access:http://eprints.utem.edu.my/id/eprint/25588/1/Optimization%20Of%20Welding%20Parameters%20On%20Mechanical%20Properties%20Of%20Aluminium%20Alloy%207075.pdf
http://eprints.utem.edu.my/id/eprint/25588/2/Optimization%20Of%20Welding%20Parameters%20On%20Mechanical%20Properties%20Of%20Aluminium%20Alloy%207075.pdf
http://eprints.utem.edu.my/id/eprint/25588/
https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=117964
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spelling my.utem.eprints.255882022-01-06T14:36:58Z http://eprints.utem.edu.my/id/eprint/25588/ Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075 Yomli, Sofia Mulyani T Technology (General) TS Manufactures This project is to study the effects of welding parameters for aluminium alloy 7075 towards the material characterization. The welding process used is Gas Metal Arc Welding (GMAW). The raw material used in this project is Aluminium Alloy (AA) 7075 and welded by using the KUKA robotic welding machine. The AA7075 was butt jointed with constant bevel angle which is 60°. There are three most important parameters of GMAW process that have been identified, which are current (A), voltage (V) and travel speed (S). The experiment is designed by using Design of Experiment (DOE) which is Response Surface Methodology (RSM) method. RSM method and Analysis of Variance (ANOVA) are used to optimize and validate the welding parameters. After that, the workpiece was cut into 11 samples with required dimensions in a dumbbell shape specimen by using wire EDM machine. Then the tensile test is conducted to observe the ultimate tensile strength (UTS), tensile modulus and also percentage elongation. The highest value of UTS obtained is 185.989 N/mm?. While the highest value of tensile modulus obtained is 20.44 N/mm?. For percentage elongation, the highest value obtained is 6%. Next, the Vickers hardness test is conducted to observe the hardness value which is measured to organize the revolution of mechanical property of weldment area. The highest value of hardness obtained is 89.3 HV. In addition, the microstructure of the sample is observed by using an optical microscope. It is to observe the length of the Heat Affected Zone (HAZ), grain size of weldment area and base metal. Multi-objective result shows that welding current at 143.7855 A and welding speed at 0.5329 m/min which 183.2128 MPa for UTS, 20.4992 MPa for tensile modulus, 6.3539% for percentage elongation and 88.7604 HV for hardness. Multi objective result shows that output of responses become slightly lower than single objective. This due to the multi-objective takes consideration all target. 2019 Thesis NonPeerReviewed text en http://eprints.utem.edu.my/id/eprint/25588/1/Optimization%20Of%20Welding%20Parameters%20On%20Mechanical%20Properties%20Of%20Aluminium%20Alloy%207075.pdf text en http://eprints.utem.edu.my/id/eprint/25588/2/Optimization%20Of%20Welding%20Parameters%20On%20Mechanical%20Properties%20Of%20Aluminium%20Alloy%207075.pdf Yomli, Sofia Mulyani (2019) Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075. Masters thesis, Universiti Teknikal Malaysia Melaka. https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=117964
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
English
topic T Technology (General)
TS Manufactures
spellingShingle T Technology (General)
TS Manufactures
Yomli, Sofia Mulyani
Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075
description This project is to study the effects of welding parameters for aluminium alloy 7075 towards the material characterization. The welding process used is Gas Metal Arc Welding (GMAW). The raw material used in this project is Aluminium Alloy (AA) 7075 and welded by using the KUKA robotic welding machine. The AA7075 was butt jointed with constant bevel angle which is 60°. There are three most important parameters of GMAW process that have been identified, which are current (A), voltage (V) and travel speed (S). The experiment is designed by using Design of Experiment (DOE) which is Response Surface Methodology (RSM) method. RSM method and Analysis of Variance (ANOVA) are used to optimize and validate the welding parameters. After that, the workpiece was cut into 11 samples with required dimensions in a dumbbell shape specimen by using wire EDM machine. Then the tensile test is conducted to observe the ultimate tensile strength (UTS), tensile modulus and also percentage elongation. The highest value of UTS obtained is 185.989 N/mm?. While the highest value of tensile modulus obtained is 20.44 N/mm?. For percentage elongation, the highest value obtained is 6%. Next, the Vickers hardness test is conducted to observe the hardness value which is measured to organize the revolution of mechanical property of weldment area. The highest value of hardness obtained is 89.3 HV. In addition, the microstructure of the sample is observed by using an optical microscope. It is to observe the length of the Heat Affected Zone (HAZ), grain size of weldment area and base metal. Multi-objective result shows that welding current at 143.7855 A and welding speed at 0.5329 m/min which 183.2128 MPa for UTS, 20.4992 MPa for tensile modulus, 6.3539% for percentage elongation and 88.7604 HV for hardness. Multi objective result shows that output of responses become slightly lower than single objective. This due to the multi-objective takes consideration all target.
format Thesis
author Yomli, Sofia Mulyani
author_facet Yomli, Sofia Mulyani
author_sort Yomli, Sofia Mulyani
title Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075
title_short Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075
title_full Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075
title_fullStr Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075
title_full_unstemmed Optimization Of Welding Parameters On Mechanical Properties Of Aluminium Alloy 7075
title_sort optimization of welding parameters on mechanical properties of aluminium alloy 7075
publishDate 2019
url http://eprints.utem.edu.my/id/eprint/25588/1/Optimization%20Of%20Welding%20Parameters%20On%20Mechanical%20Properties%20Of%20Aluminium%20Alloy%207075.pdf
http://eprints.utem.edu.my/id/eprint/25588/2/Optimization%20Of%20Welding%20Parameters%20On%20Mechanical%20Properties%20Of%20Aluminium%20Alloy%207075.pdf
http://eprints.utem.edu.my/id/eprint/25588/
https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=117964
_version_ 1724077904350937088
score 13.211869

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