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对有序金属间化合物(Fe_(60)Ni_(40))_3(V_(98)Ti_2)的蠕变断裂行为进行了初步研究。用透射电镜观察了稳态蠕变过程中位错亚结构的变化,发现存在大量的堆垛层错和成对位错以及较高密度的位错网络。对断口及近断口剖面的扫描电镜观察指出,晶界上空洞所形成的沿晶断裂是(Fe_(60)Ni_(40))_3(V_(98)Ti_2)蠕变断裂的主要机制。
The creep rupture behavior of ordered intermetallic compound (Fe_ (60) Ni_ (40)) __3 (V_ (98) Ti_2) was studied. The changes of dislocation sub-structure during steady-state creep were observed by TEM. There were a lot of stacking faults and paired dislocations and high-density dislocation networks. Scanning electron microscopy (SEM) observations of the fracture surface and the near fracture surface point out that the intergranular fracture formed on the grain boundary is the main mechanism of (Fe_ (60) Ni_ (40)) _3 (V_ (98) Ti_2) creep rupture.