About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Surface Engineering V
|
Presentation Title |
N-32: Evaluation of LME Susceptibility of Al-Zn-Si Coated TRIP Steel |
Author(s) |
Daehoon Jeong, Seok-Hyun Hong, Suk-Kyu Lee, Sung-Joon Kim |
On-Site Speaker (Planned) |
Daehoon Jeong |
Abstract Scope |
Although Zn-coated advanced high strength steels (AHSS) are widely used in the automotive industry, Zn-assisted liquid metal embrittlement (LME) is one of the critical problems to overcome. In this respect, the development of Al-Zn-Si ternary coating system is drawing attention to replace Zn coating. In this study, Al-Zn-Si coated TRIP steel has been selected, and the susceptibility to LME is assessed with hot tensile tests using the Gleeble 3500 which can closely simulate the resistance spot welding (RSW) process. The microstructural changes of the coating layer during the hot tensile testing is analyzed with the scanning electron microscopy (SEM) and its effect on LME is discussed. In addition, a possible mechanism of base metal exposure, liquid metal penetration, and fracture in the coated steel is explained as well. |
Proceedings Inclusion? |
Planned: |
Keywords |
Surface Modification and Coatings, Iron and Steel, |