GMA Spot Welding of A7075-T651/AZ31B Dissimilar Alloys using Stainless Steel Filler
The aim of this research was to investigate the welding joint's fracture toughness and fracture surface morphologies between A7075-T651 aluminum and AZ31B magnesium dissimilar alloys welded using a new technique of gas metal arc spot lap welding with unconventional ER308L-Si stainless steel fil...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Taylor & Francis
2014
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| Subjects: | |
| Online Access: | http://umpir.ump.edu.my/id/eprint/5109/ http://umpir.ump.edu.my/id/eprint/5109/ http://umpir.ump.edu.my/id/eprint/5109/ http://umpir.ump.edu.my/id/eprint/5109/1/GMA_techniqu_AZ31B_A7075.pdf http://umpir.ump.edu.my/id/eprint/5109/4/GMA%20Spot%20Welding%20of%20A7075-T651-AZ31B%20Dissimilar%20Alloys%20Using%20Stainless%20Steel%20Filler.pdf |
| Summary: | The aim of this research was to investigate the welding joint's fracture toughness and fracture surface morphologies between A7075-T651 aluminum and AZ31B magnesium dissimilar alloys welded using a new technique of gas metal arc spot lap welding with unconventional ER308L-Si stainless steel filler. The fracture toughness of the welding joints was estimated from yield strength and absorbed charpy impact energy of the joints using Rolfe-Novak-Barsom correlation, and was compared with the fracture toughness of AZ31B parent metal. Fracture surface morphologies were investigated by scanning electron microscopy. The results showed that the joint can achieve a maximum fracture toughness of 93.08% of the AZ31B parent metal. Most of the joints failed at AZ31B
alloy, while some failed at A7075-T651 alloy and ER308L-Si nugget. Brittle fracture mechanism was observed for all the joints. It was found that the new gas metal arc spot
lap welding technique with ER308L-Si filler could offer very good mechanical properties. |
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