Solidification Path of TiC-added Mo-Si-B Alloys

For TiC-added Mo-Si-B alloys, the primary phase is considerably influenced by the alloy composition. The TCS Mo-based Alloys Database (TCMO) can also predict the solidification path for these alloys. For example, in the Mo-1.7Si-3.3B-15TiC (at.%) alloy, TiC solidifies first, followed by the BCC+TiC eutectic. By contrast, in the Mo-6.7Si-13.3B-7.5TiC (at.%) alloy, the primary solidification phase becomes T2. The predicted solidification paths and primary solidification phases are consistent with the experimental observation from [2014Miy].

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Equilibrium solidification and Scheil solidification simulations of the Mo-1.7Si-3.3B-15TiC (at.%) alloy.

Figure 1: Equilibrium solidification and Scheil solidification simulations of the Mo-1.7Si-3.3B-15TiC (at.%) alloy. The predicted solidification path and primary solidification phase are consistent with the experimental observation from [2014Miy].

Equilibrium solidification and Scheil solidification simulations of the Mo-6.7Si-13.3B-7.5TiC (at.%) alloy.

Figure 2: Equilibrium solidification and Scheil solidification simulations of the Mo-6.7Si-13.3B-7.5TiC (at.%) alloy. The predicted solidification path and primary solidification phase are consistent with the experimental observation from [2014Miy].

Reference

[2014Miy] S. Miyamoto, K. Yoshimi, S.-H. Ha, T. Kaneko, J. Nakamura, T. Sato, K. Maruyama, R. Tu, T. Goto, Phase Equilibria, Microstructure, and High-Temperature Strength of TiC-Added Mo-Si-B Alloys. Metall. Mater. Trans. A. 45, 1112–1123 (2014).