Synergistic Effect of B and Y Micro-alloying on Oxide-Layer Formation on the Super-austenitic S31254 Stainless Steel

• DOI: 10.1007/s11085-024-10236-z
• Publication Date: 2024-03-21T13:01:36Z
• Authors: Wenjun Wang; Junyu Ren; Jinyao Ma; Caili Zhang; Zheng Li; Yuping Li; Nan Dong; Peide Han
• Keywords: Austenitic stainless steel

Aiming to address the Mo volatilization problem of super-austenitic stainless steel at high temperature, S31254 containing B and rare earth element Y with oxidation resistance was designed. It observed that a synergy + can promote formation dense Cr2O3 layer 1050 1100 °C, making MoO3 difficult. While oxide layers 0B sample from top bottom were divided into four layers: Fe-rich layer, Cr–Mn–Ni spinel (loose porous), thus undense in hardly inhibit volatilization, especially °C. In addition, synergistic effect on diffusion Cr surface calculated using first-principles calculations. The results demonstrated both addition enhance surface, while specifically combination O. Consequently, combined presence exhibits more favorable for improving density effectively inhibiting thereby enhancing S31254.