About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Advances in Metallic Coated Advanced Steels
|
| Presentation Title |
Grain-boundary precipitation as a mechanism of liquid-metal embrittlement in advanced high-strength steels |
| Author(s) |
Seungchang Han, Yuki Ikeda, Theophilius Wallis, Reza Darvishi Kamachali, Robert Maass |
| On-Site Speaker (Planned) |
Robert Maass |
| Abstract Scope |
Liquid-metal embrittlement (LME) by Zinc (Zn) is a prominent cause for failure of advanced high-strength steels (AHSSs). To uncover the origin of LME of AHSSs has been a long-standing challenge. In the past years, we have focused on the microstructural evolution in grain-boundary (GB) environments prior to LME-driven microcracking (Mat. Tod. Adv. 13 (2022) 100196; Acta Materialia 259 (2023) 119243). This has brought to light a possible GB segregation mechanism responsible for the formation of Fe-Zn intermetallic phases prior to microcracking (Scripta Materialia 238 (2024) 115758). Much of this this work leveraged transmission electron microscopy (TEM), which is highly local. In this talk, we will revisit our central findings related to GB precipitation as a driver for LME in advanced steels and connect our TEM observations to the bulk response. Specifically, we will focus on synchrotron diffraction experiments with the aim of identifying GB precipitation in galvanized bulk AHSSs. |