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The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets

In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the salt spray test, produced a whole rusty surface on the tested specimens (batch 2...

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Main Author: Ahmad Azid Tahar, Ahmad Latiffi
Other Authors: Shamsul Baharin Jamaludin, Prof. Madya Dr. (Advisor)
Format: Learning Object
Language:English
Published: Universiti Malaysia Perlis 2008
Subjects:
Sheet-steel > Welding
Steel > Welding
Resistance spot welding
Strength of materials > Testing
Welded joints
Online Access:http://dspace.unimap.edu.my/xmlui/handle/123456789/3370
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spelling my.unimap-33702009-04-16T03:16:05Z The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets Ahmad Azid Tahar, Ahmad Latiffi Shamsul Baharin Jamaludin, Prof. Madya Dr. (Advisor) Sheet-steel -- Welding Steel -- Welding Resistance spot welding Strength of materials -- Testing Welded joints In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the salt spray test, produced a whole rusty surface on the tested specimens (batch 2). The welding joints were subjected to tensileshearing test in order to determine the strength of the welded joints from ambient and in corrosive environment. In addition, hardness measurement and microstructural fracture examinations were carried out in order to examine the influence of both environments to the shearing strength. Tensile-shear test showed significant differences on the failure load between these two batches where corrosion had affected the surface strength of the welded steel. Hardness measurement results indicated that welding nugget gave the highest hardness followed with the heat affected zone then the parent metal. Differences between the non-corroded and corroded hardness values are quite obvious but with slight margin. Microstructural analysis revealed that the deformations took place during tensile-shear test. Fracture path was made starting from the fracture tip where microvoid coalescence. As the strain in the material increases, the microvoids grow, coalesce, and form a continuous fracture surface. 2008-11-27T08:02:28Z 2008-11-27T08:02:28Z 2008-04 Learning Object http://hdl.handle.net/123456789/3370 en Universiti Malaysia Perlis School of Materials Engineering
institution Universiti Malaysia Perlis
building UniMAP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Perlis
content_source UniMAP Library Digital Repository
url_provider http://dspace.unimap.edu.my/
language English
topic Sheet-steel -- Welding
Steel -- Welding
Resistance spot welding
Strength of materials -- Testing
Welded joints
spellingShingle Sheet-steel -- Welding
Steel -- Welding
Resistance spot welding
Strength of materials -- Testing
Welded joints
Ahmad Azid Tahar, Ahmad Latiffi
The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
description In the present work, mild steel sheets consisting two batches were welded by resistance spot welding at different welding parameters and exposed under different environments. The 5% sodium chloride brine was used in the salt spray test, produced a whole rusty surface on the tested specimens (batch 2). The welding joints were subjected to tensileshearing test in order to determine the strength of the welded joints from ambient and in corrosive environment. In addition, hardness measurement and microstructural fracture examinations were carried out in order to examine the influence of both environments to the shearing strength. Tensile-shear test showed significant differences on the failure load between these two batches where corrosion had affected the surface strength of the welded steel. Hardness measurement results indicated that welding nugget gave the highest hardness followed with the heat affected zone then the parent metal. Differences between the non-corroded and corroded hardness values are quite obvious but with slight margin. Microstructural analysis revealed that the deformations took place during tensile-shear test. Fracture path was made starting from the fracture tip where microvoid coalescence. As the strain in the material increases, the microvoids grow, coalesce, and form a continuous fracture surface.
author2 Shamsul Baharin Jamaludin, Prof. Madya Dr. (Advisor)
author_facet Shamsul Baharin Jamaludin, Prof. Madya Dr. (Advisor)
Ahmad Azid Tahar, Ahmad Latiffi
format Learning Object
author Ahmad Azid Tahar, Ahmad Latiffi
author_sort Ahmad Azid Tahar, Ahmad Latiffi
title The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
title_short The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
title_full The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
title_fullStr The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
title_full_unstemmed The influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
title_sort influence of welding parameters and corrosive environment on the joint strength of resistance spot-welded mild steel sheets
publisher Universiti Malaysia Perlis
publishDate 2008
url http://dspace.unimap.edu.my/xmlui/handle/123456789/3370
_version_ 1643787819270799360
score 13.222552

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