Year: 2025
Type: article
Abstract: An optimal annealing process for enhancing the room-temperature fracture toughness of MoSiBTiC alloys was investigated in this study. The alloy with a composition of Mo–5Si–10B–10Ti–10C (at%) was subjected to three annealing conditions to control its microstructure. Quantitative microstructural analysis and mechanical testing revealed that the toughness of the MoSiBTiC alloys increased with the size of the Mo ss phase and decreased with its hardness. Annealing at 1800 °C for 24 h promoted microstructural coarsening but also led to increased solution hardening and reduced ductility of the Mo ss phase. In contrast, annealing at 1600 °C for 100 h improved the ductility of the Mo ss phase by reducing solution hardening, although the coarsening of the Mo ss phase was relatively slow. Based on these findings, a two-step annealing process that combines the benefits of lower-temperature and higher-temperature annealing conditions was proposed to effectively enhance the fracture toughness of MoSiBTiC alloys.
Source: Scientific Reports
Authors: Nobuaki Sekido, Tetsuya Saito, Kyosuke Yoshimi
Institution: Tohoku University
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
OpenAlex ID: W7116770872