마그네슘을 6 wt.% 함유한 알루미늄 합금의 저항 점용접성 평가open accessResistance Spot Weldability of Aluminum Alloy with 6 wt.% Magnesium
- Other Titles
- Resistance Spot Weldability of Aluminum Alloy with 6 wt.% Magnesium
- Authors
- 김민규; 김세현; 황인성; 김동윤; 김영민; 이승환; 유지영
- Issue Date
- Oct-2021
- Publisher
- 대한용접접합학회
- Keywords
- Resistance spot welding; Aluminum alloy; Magnesium; Weld lobe; Nugget size; Porosity ratio; Hardness; Tensile shear strength; Energy absorption
- Citation
- 대한용접접합학회지, v.39, no.5, pp.480 - 488
- Indexed
- KCI
- Journal Title
- 대한용접접합학회지
- Volume
- 39
- Number
- 5
- Start Page
- 480
- End Page
- 488
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/140733
- DOI
- 10.5781/JWJ.2021.39.5.3
- ISSN
- 2466-2232
- Abstract
- To ensure safety and reduce the weight of vehicles, studies are being actively conducted on different aluminum al- loys that have strength higher than conventional aluminum alloys. The development of high-performance aluminum alloys through magnesium content control is underway. Research on manufacturing techniques, such as, welding for application to the car body parts of these materials is required. In this study, the resistance spot weldability of an alu- minum alloy with 6 wt.% magnesium (Al-6Mg) was evaluated and compared with the commercial aluminum alloy 5052, 6061 (Al5052, Al6061). The suitable welding range of the Al-6Mg was found to have a welding current of 24 kA to 28 kA, and a similar level of Al6061. The welding heat input was almost the same for the three materials, which resulted in no difference in the diameter of the nuggets. There was no significant difference of the porosity ra- tio between Al-6Mg and Al5052; however, the porosity ratio of Al6061 was higher. The alloy with the highest tensile shear strength, hardness and energy absorption of a welded joint was Al-6Mg. The low porosity ratio and high hard- ness of the Al-6Mg alloy caused the relatively high tensile shear strength and energy absorption of the welded joint.
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