Liquid metal embrittlement susceptibility of two Zn-Coated advanced high strength steels of similar strengths
نویسندگان
چکیده
Advanced high strength steels (AHSS) exhibit an increased susceptibility to Zn-assisted liquid metal embrittlement (LME). The of AHSS is believed be one important factor controlling LME sensitivity; this study investigated the behavior two having different chemical compositions, while maintaining similar tensile at elevated temperatures. Hot tension tests were performed using simulated spot-weld thermal cycles determine critical ranges temperatures and strain rates capable triggering in these AHSS. Despite fact that had strengths, distinct differences observed their LME-associated ductility trough characteristics cracking severity. This comparison helps isolate contributions composition on Zn-LME susceptibility. Specifically, grade with higher-LME sensitivity a Si content 1 wt%, lower-LME 0.06 wt%. Three-dimensional elemental characterization time-of-flight secondary ion-mass-spectroscopy indicated Si-enrichment coating-substrate interface layers galvanized samples during cycling difference discussed context behavior, which potentially suppresses Fe–Zn alloying reactions increases likelihood direct contact between Zn steel substrate.
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ژورنال
عنوان ژورنال: Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
سال: 2021
ISSN: ['0921-5093', '1873-4936']
DOI: https://doi.org/10.1016/j.msea.2021.141569