About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
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| Symposium
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Cutting-Edge Characterization and Electrochemical Techniques for Unraveling Corrosion Phenomena
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| Presentation Title |
Atomic-scale Understanding of Cu Effect on Mechanical, Antibacterial, and Corrosion Properties of Ultrahigh-strength Maraging Stainless Steel |
| Author(s) |
Boxin Wei, Mengchao Niu |
| On-Site Speaker (Planned) |
Boxin Wei |
| Abstract Scope |
Ultra-high strength steels (UHSSs) with superior mechanical properties and corrosion resistance are vital for demanding applications in energy, aerospace, and biomedical sectors. In this study, we designed a novel antibacterial Fe‒Ni‒Co‒Cr‒Ti‒Mo UHSS alloyed with Cu, achieving ~1.8 GPa tensile strength. Atomic-scale analyses reveal that Cu addition promotes the co-precipitation of Cu-rich and Ni₃Ti nano-precipitates, enhancing both strength and ductility via austenite reversion and TRIP effects. Furthermore, Cu-rich precipitates exhibit strong antibacterial properties by releasing Cu ions that inhibit sulfate-reducing bacteria (SRB), mitigating SRB-induced corrosion. The presence of Cu also refines the passive layer structure by suppressing (Cr,Mo)-rich cluster formation, enhancing corrosion resistance and reducing pitting susceptibility. These findings demonstrate a promising strategy for developing next-generation UHSSs with integrated strength, antibacterial function, and corrosion resistance for use in microbial corrosion environments. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Iron and Steel, Mechanical Properties |