Issue |
Metall. Res. Technol.
Volume 118, Number 1, 2021
|
|
---|---|---|
Article Number | 112 | |
Number of page(s) | 10 | |
DOI | https://doi.org/10.1051/metal/2020094 | |
Published online | 26 January 2021 |
Regular Article
Effect of different lapping orders on mechanical performance and nugget forming process for three-sheet dissimilar resistance spot welding joints between DC06 and unequal-thickness hot-stamped B1500HS steel sheets
1
School of Materials Science and Engineering, Shanghai University,
Shanghai, PR China
2
Saic commercial vehicle technology centre,
Shanghai, PR China
3
State Key Laboratory of Advanced Special Steel, Shanghai University,
Shanghai, PR China
* e-mail: wrwang@shu.edu.cn
Received:
10
October
2020
Accepted:
22
December
2020
In this study, the mechanical properties of two welded joints under different lapping orders (B1500HS-1.4 mm/B1500HS-1.6 mm/DC06, denoted as type I; B1500HS-1.4 mm/DC06/B1500HS-1.6 mm, denoted type II) were compared. The nugget formation mechanism was analysed by a coupled electrical-thermal finite element model (FEM). It is found that different lapping orders significantly affect the mechanical properties of three-sheet RSW joints. All RSW joints tend to fail in the pull-out or tearing failure mode. The peak load of the two interfaces of type II RSW joint is more balanced, and the failure load of which is much higher than that of the type I RSW joint; The warpage was observed at type I welded joint. Considered the load-carrying capacity, type II was excellent. The simulation results indicate that the diameter of the weld nugget at the upper interface of the type I RSW joint was larger than that on the other interfaces, which agree well with the experimental results. The nugget formation mechanism of dissimilar high strength steel three-sheet RSW joint was obtained that forming the nugget firstly from two interfaces and final formed nuggets were asymmetric.
Key words: resistance spot welding / three-sheet spot welding joint / dissimilar high-strength steel / mechanical properties / nugget formation / FEM
© EDP Sciences, 2021
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.