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由于TiAl基合金具有较低的密度和很好的高温强度,作为一种新型宇航结构材料,已经引起了广泛的注意。由于这种材料在使用中要在氢气氛中工作,因而氢对其性能的影响也是一个必须研究的问题。在高温氢气氛中处理后,TiAl中将固溶进大量的氢,这些氢在随后的冷却中将以氢化物形式析出,这些氢化物会显著影响TiAl合金的力学性能和断裂行为。因而有必要对TiAl中氢化物的形成规律及结构性能进行深入的研究,但目前这方面仅有少量
Due to its low density and good high temperature strength, TiAl-based alloys have attracted a great deal of attention as a new aerospace structural material. Since this material is to be used in a hydrogen atmosphere, the effect of hydrogen on its performance is also an issue that must be studied. After being treated in a high temperature hydrogen atmosphere, a large amount of hydrogen will be dissolved into the TiAl. The hydrogen will be precipitated as a hydride during the subsequent cooling. These hydrides will significantly affect the mechanical properties and fracture behavior of the TiAl alloy. Therefore, it is necessary to study the formation and structural properties of hydride in TiAl. However, there are only a few