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R. Jafari, and B. Eghbali, Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp.1608-1617. https://dx.doi.org/10.1007/s12613-021-2263-9
R. Jafari, and B. Eghbali, Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces, Int. J. Miner. Metall. Mater., 29(2022), No. 8, pp.1608-1617. https://dx.doi.org/10.1007/s12613-021-2263-9
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多层 Ti/Al/Nb 复合界面变形后退火过程中金属间化合物的生长行为

摘要: 三金属Ti–Al–Nb复合材料通过三个程序进行加工:热压、轧制和热压,然后进行后续轧制。 然后将制造的复合材料在 600、625 和 650°C 的温度下退火不同时间。 界面处的显微组织观察表明,塑性变形应变的增加显着影响了 TiAl3金属间化合物层的演化并加速了层的生长。相反,施加的应变量不会显着影响 NbAl3 金属间化合物层厚度的演变。还发现Al和Ti原子在整个TiAl3层中发生了扩散,但只有Al原子在NbAl3层中扩散。 NbAl3 金属间化合物层生长缓慢是由于 Nb 原子缺乏扩散和 Al 原子与 Nb 原子反应的高活化能所致。

 

Intermetallic growth behavior during post deformation annealing in multilayer Ti/Al/Nb composite interfaces

Abstract: The tri-metal Ti–Al–Nb composites were processed through three procedures: hot pressing, rolling, and hot pressing, followed by subsequent rolling. The fabricated composites were then subjected to annealing at 600, 625, and 650°C temperatures at different times. Microstructure observation at the interfaces reveals that the increase in plastic deformation strain significantly affects TiAl3 intermetallic layers’ evolution and accelerates the layers’ growth. On the contrary, the amount of applied strain does not significantly affect the evolution of the NbAl3 intermetallic layer thickness. It was also found that Al and Ti atoms’ diffusion has occurred throughout the TiAl3 layer, but only Al atoms diffuse through the NbAl3 layer. The slow growth rate of the NbAl3 intermetallic layer is due to the lack of diffusion of Nb atoms and the high activation energy of Al atoms’ reaction with Nb atoms.

 

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