本文研究了合金化的Ni_3Al-Fe基合金高温变形后的组织及瞬时拉伸性能和700—900℃的蠕变持久性能,结果表明,合金由γ′的β相组成,其晶粒在温度低于1000℃时保持稳定;屈服强度在<600℃时也保持稳定;合金的高温塑性好,蠕变研究表明,该合金在700—900℃蠕变由位错攀移控制,其蠕变激活能为439kJ/mol,应力敏感系数为4.
The microstructure, tensile properties at 20—950℃ and creep rupture properties at 700—900℃ in a Ni_3Al-Fe based alloy after high-temperature deformation have been studied. The results show the microstructure of the alloy is composed of γ′ and β phases. The grain size and yield strength of the alloy is stable ≤600℃. And it is ductile at high-temperature. The creep in the alloy at 700—900℃ is controlled by dislocations climb, and creep activity energy is 439 kJ / mol, stress factor is 4.
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