延展性(地球科学)
材料科学
焓
相(物质)
合金
量子化学
蠕动
热力学
冶金
化学
物理
分子
有机化学
作者
Ouahiba Ouadah,G. Merad,H. Si Abdelkader
摘要
Abstract TiAl alloys provide a significantly higher creep resistance at high temperatures. However, the low ductility of these alloys at room temperature is considered as a drawback when used as a turbine blade coating material. One way to increase the ductility is by introducing solutes in the chemical composition of TiAl. Surprisingly, a ductility promotion can be achieved through a phase transition from L1 0 to B2 phase when the concentrations of Mo, W, and Cu are about 12, 11 and 12.5 at.%, respectively, while there is no phase transformation for TiAl with the presence of Zn. This study will tackle the reason of this behavior by analyzing the enthalpy of formation, mechanical and thermodynamic properties, and electronic structure by performing first‐principles calculations.
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