Effect Of Resistance Spot Welding Parameters On Copper And Brass

Resistance spot welding is the most commonly used method for joining sheet metals. Most studies in this technique were focus on selected materials and little information is available regarding the response and behaviour of copper and copper alloy. Thus, in this research is purposed to study the eff...

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Main Author:	Mat Saad, Nurihal Hanim
Format:	Thesis
Language:	English
Published:	2012
Subjects:	TN Mining Engineering Metallurgy
Online Access:	http://eprints.usm.my/40909/1/NURIHAL_HANIM_BT_MAT_SAAD_24_pages.pdf
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id	my-usm-ep.40909
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spelling	my-usm-ep.409092018-07-05T03:39:15Z Effect Of Resistance Spot Welding Parameters On Copper And Brass 2012 Mat Saad, Nurihal Hanim TN Mining Engineering. Metallurgy Resistance spot welding is the most commonly used method for joining sheet metals. Most studies in this technique were focus on selected materials and little information is available regarding the response and behaviour of copper and copper alloy. Thus, in this research is purposed to study the effect of resistance spot welding parameters on copper and brass alloy. The copper and brass welded by resistance spot welding technique under varied welding currents and applied loads has been investigated. A nugget measurement looked at the influence of loads (60 N, 65 N, 70 N and 75 N) and weld currents (5.50 kA, 6.00 kA and 6.50 kA) on both fusion area and internal porosity. Nugget diameter increased at low and high-level of welding current, but significantly restricted to a maximum value at intermediate level of welding. Furthermore, copper joints revealed more oxide formation and crack development, while brass joints revealed some pores and excess penetration in the fusion area. Thus, the weld currents were increased up to 8.00 kA, 8.50 kA and 8.90 kA, while applied load parameters were kept constant at 60 N, 65 N, 70 N and 75 N to which taken as optimised values to improve the weld joined. The mechanical properties and microstructure of these welded copper and brass was detailed. Specimens joined at higher welding current yielded higher tensile-shear strength results than those joined at lowest welding current. Failure modes are detailed by observing weld fracture surfaces. A correlation between base metal and fusion zone hardness is produced. The hardness of brass joints gave the highest hardness values due to grains refinement resulted from the weld nugget zone and this was followed by HAZ and original base metal. While copper joints revealed the weld nugget by HAZ and original base metal. While copper joints revealed the weld nugget gives the lowest hardness values than the original base metal due to annealing softeningwas dominant caused coarsening grain structures. 2012 Thesis http://eprints.usm.my/40909/ http://eprints.usm.my/40909/1/NURIHAL_HANIM_BT_MAT_SAAD_24_pages.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TN Mining Engineering Metallurgy
spellingShingle	TN Mining Engineering Metallurgy Mat Saad, Nurihal Hanim Effect Of Resistance Spot Welding Parameters On Copper And Brass
description	Resistance spot welding is the most commonly used method for joining sheet metals. Most studies in this technique were focus on selected materials and little information is available regarding the response and behaviour of copper and copper alloy. Thus, in this research is purposed to study the effect of resistance spot welding parameters on copper and brass alloy. The copper and brass welded by resistance spot welding technique under varied welding currents and applied loads has been investigated. A nugget measurement looked at the influence of loads (60 N, 65 N, 70 N and 75 N) and weld currents (5.50 kA, 6.00 kA and 6.50 kA) on both fusion area and internal porosity. Nugget diameter increased at low and high-level of welding current, but significantly restricted to a maximum value at intermediate level of welding. Furthermore, copper joints revealed more oxide formation and crack development, while brass joints revealed some pores and excess penetration in the fusion area. Thus, the weld currents were increased up to 8.00 kA, 8.50 kA and 8.90 kA, while applied load parameters were kept constant at 60 N, 65 N, 70 N and 75 N to which taken as optimised values to improve the weld joined. The mechanical properties and microstructure of these welded copper and brass was detailed. Specimens joined at higher welding current yielded higher tensile-shear strength results than those joined at lowest welding current. Failure modes are detailed by observing weld fracture surfaces. A correlation between base metal and fusion zone hardness is produced. The hardness of brass joints gave the highest hardness values due to grains refinement resulted from the weld nugget zone and this was followed by HAZ and original base metal. While copper joints revealed the weld nugget by HAZ and original base metal. While copper joints revealed the weld nugget gives the lowest hardness values than the original base metal due to annealing softeningwas dominant caused coarsening grain structures.
format	Thesis
qualification_level	Master's degree
author	Mat Saad, Nurihal Hanim
author_facet	Mat Saad, Nurihal Hanim
author_sort	Mat Saad, Nurihal Hanim
title	Effect Of Resistance Spot Welding Parameters On Copper And Brass
title_short	Effect Of Resistance Spot Welding Parameters On Copper And Brass
title_full	Effect Of Resistance Spot Welding Parameters On Copper And Brass
title_fullStr	Effect Of Resistance Spot Welding Parameters On Copper And Brass
title_full_unstemmed	Effect Of Resistance Spot Welding Parameters On Copper And Brass
title_sort	effect of resistance spot welding parameters on copper and brass
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2012
url	http://eprints.usm.my/40909/1/NURIHAL_HANIM_BT_MAT_SAAD_24_pages.pdf
_version_	1747820837348573184

Effect Of Resistance Spot Welding Parameters On Copper And Brass

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