| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Surface Engineering VII
|
| Presentation Title |
Effect of the Welding Current on the Liquid Metal Embrittlement of Galvanized TWIP950 Advanced High Strength Steel |
| Author(s) |
Jingyi Gu, Jiayi Zhou, Yu Sun, Rongxun Hu, Yulai Gao |
| On-Site Speaker (Planned) |
Jingyi Gu |
| Abstract Scope |
TWIP950 advanced high strength steel (AHSS) with a zinc-based coating for corrosion protection is widely utilized in the automotive industry. Nevertheless, galvanized TWIP950 steels are prone to liquid metal embrittlement (LME) during the resistance spot welding (RSW) process. In this study, the influence of welding currents on LME of galvanized TWIP950 steel was comparatively analyzed. The crack quantitative results revealed that no obvious LME cracks could be observed below expulsion. However, the LME cracks formed with the longest length of 55.0 μm at expulsion. Subsequently, numerous longer LME cracks were detected above expulsion, with the longest crack reaching as long as 1138.9 μm. It was deemed that higher welding current could bring more heat input, leading to the formation of more LME cracks during the RSW. Thus, it was anticipated that the LME susceptibility could be reduced in the TWIP950 welded joints with an appropriate control of the welding current. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Surface Modification and Coatings, Iron and Steel, Other |