| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Thin Films and Coatings: Properties, Processing and Applications
|
| Presentation Title |
Role of the Si Content in the LME Susceptibility of the Zn-Coated QP980 Advanced High Strength Steel |
| Author(s) |
Rongxun Hu, Jiayi Zhou, Yu Sun, Bolong Li, Yulai Gao |
| On-Site Speaker (Planned) |
Rongxun Hu |
| Abstract Scope |
QP980 steel is widely used attributing to its excellent mechanical property. However, liquid metal embrittlement (LME) also becomes a challenge for the Zn-coated QP980 steel during the resistance spot welding (RSW) process. Generally, the chemical composition of the advanced high strength steels (AHSSs) is considered to be one of the important factors to affect the LME susceptibility. In the present study, the LME susceptibility of the RSW galvanized QP980 steels with various Si content was comparatively investigated. The results revealed that more severe LME cracks could be observed in both the specimens with increasing the welding current. In particular, the length of LME cracks in the specimen with 0.849 wt.% Si was much shorter than those of the specimen with 1.79 wt.% Si. The comparative results reflected that lower LME susceptibility could be anticipated in the galvanized QP980 steel by reducing the Si content. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Surface Modification and Coatings, Mechanical Properties |