| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Metallic Coated Advanced Steels
|
| Presentation Title |
On the Effect of Chemical Composition on the Liquid Metal Embrittlement Susceptibility of Advanced High Strength Steels |
| Author(s) |
Fateme Abdiyan, Joseph McDermid , Hatem Zurob, Andrew Macwan, Mirnaly Saenz de Miera, Bita Pourbahari, Brian Langelier |
| On-Site Speaker (Planned) |
Fateme Abdiyan |
| Abstract Scope |
Due to their exceptional strength, ductility, and ability to absorb energy at a reduced weight, advanced high-strength steels are widely used in automotive body structures. However, a drawback of these steels is their susceptibility to liquid metal embrittlement (LME) during resistance spot welding (RSW) due to the presence of liquid from the melting of zinc coating. This study aims to evaluate the impact of alloying elements, such as Si and Mo, on the LME susceptibility of advanced steels during hot tensile testing and/or the shoulder region of resistance spot welds. Optical microscopy was used to measure LME cracking in samples subjected to hot tensile testing and RSW, while atom probe tomography revealed elemental segregation at crack tips. Scanning and transmission electron microscopes were employed to analyze alloying element distribution in regions subjected to LME. The findings of this study indicated that Si promotes LME cracking, whereas Mo enhances LME resistance. |